/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-bad/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 18:16:56,548 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 18:16:56,550 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 18:16:56,580 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 18:16:56,627 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-07-09 18:16:56,665 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 18:16:56,666 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 18:16:56,666 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 18:16:56,666 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 18:16:56,668 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 18:16:56,668 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 18:16:56,669 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 18:16:56,669 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 18:16:56,669 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 18:16:56,669 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 18:16:56,670 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 18:16:56,670 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 18:16:56,670 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 18:16:56,670 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 18:16:56,670 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 18:16:56,670 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 18:16:56,670 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 18:16:56,670 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 18:16:56,670 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 18:16:56,671 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 18:16:56,671 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 18:16:56,671 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 18:16:56,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 18:16:56,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:16:56,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 18:16:56,672 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 18:16:56,672 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 18:16:56,672 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 18:16:56,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 18:16:56,672 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 18:16:56,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 18:16:56,672 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 18:16:56,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 18:16:56,950 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 18:16:56,953 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 18:16:56,953 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 18:16:56,954 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 18:16:56,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2021-07-09 18:16:56,955 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2021-07-09 18:16:56,988 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 18:16:56,990 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 18:16:56,990 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 18:16:56,991 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 18:16:56,991 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 18:16:56,999 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/1) ... [2021-07-09 18:16:57,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/1) ... [2021-07-09 18:16:57,011 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 18:16:57,012 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 18:16:57,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 18:16:57,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 18:16:57,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/1) ... [2021-07-09 18:16:57,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/1) ... [2021-07-09 18:16:57,019 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/1) ... [2021-07-09 18:16:57,019 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/1) ... [2021-07-09 18:16:57,020 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/1) ... [2021-07-09 18:16:57,023 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/1) ... [2021-07-09 18:16:57,023 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/1) ... [2021-07-09 18:16:57,024 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 18:16:57,025 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 18:16:57,025 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 18:16:57,025 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 18:16:57,027 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 18:16:57,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 18:16:57,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 18:16:57,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 18:16:57,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 18:16:57,072 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 18:16:57,072 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 18:16:57,072 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 18:16:57,072 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 18:16:57,073 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 18:16:57,073 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 18:16:57,176 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 18:16:57,176 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 18:16:57,177 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:16:57 BoogieIcfgContainer [2021-07-09 18:16:57,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 18:16:57,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 18:16:57,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 18:16:57,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 18:16:57,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 06:16:56" (1/2) ... [2021-07-09 18:16:57,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c558e9b and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 06:16:57, skipping insertion in model container [2021-07-09 18:16:57,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 06:16:57" (2/2) ... [2021-07-09 18:16:57,182 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2021-07-09 18:16:57,185 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 18:16:57,185 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 18:16:57,185 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 18:16:57,186 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 18:16:57,204 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 18:16:57,218 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 18:16:57,231 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 18:16:57,231 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 18:16:57,231 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 18:16:57,231 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 18:16:57,232 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 18:16:57,232 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 18:16:57,232 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 18:16:57,232 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 18:16:57,238 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-07-09 18:16:57,248 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,249 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 18:16:57,254 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:57,254 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:57,254 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1635099045, now seen corresponding path program 1 times [2021-07-09 18:16:57,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:57,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606310022] [2021-07-09 18:16:57,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:57,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:57,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606310022] [2021-07-09 18:16:57,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606310022] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:57,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:57,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 18:16:57,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058796126] [2021-07-09 18:16:57,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 18:16:57,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:57,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 18:16:57,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:57,371 INFO L87 Difference]: Start difference. First operand has 32 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:57,389 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2021-07-09 18:16:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 18:16:57,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 18:16:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:57,396 INFO L225 Difference]: With dead ends: 57 [2021-07-09 18:16:57,396 INFO L226 Difference]: Without dead ends: 50 [2021-07-09 18:16:57,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 18:16:57,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-07-09 18:16:57,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-07-09 18:16:57,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2021-07-09 18:16:57,445 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2021-07-09 18:16:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:57,446 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2021-07-09 18:16:57,446 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,447 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2021-07-09 18:16:57,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:16:57,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:57,448 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:57,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 18:16:57,449 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:57,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:57,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2119693475, now seen corresponding path program 1 times [2021-07-09 18:16:57,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:57,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100225648] [2021-07-09 18:16:57,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:57,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,582 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:57,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100225648] [2021-07-09 18:16:57,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100225648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:57,582 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204148675] [2021-07-09 18:16:57,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:57,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 18:16:57,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:57,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:57,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204148675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:57,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:57,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-07-09 18:16:57,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769778143] [2021-07-09 18:16:57,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 18:16:57,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:57,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 18:16:57,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:16:57,780 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:57,912 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-07-09 18:16:57,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 18:16:57,912 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 18:16:57,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:57,913 INFO L225 Difference]: With dead ends: 68 [2021-07-09 18:16:57,913 INFO L226 Difference]: Without dead ends: 68 [2021-07-09 18:16:57,914 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:16:57,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-07-09 18:16:57,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-07-09 18:16:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-07-09 18:16:57,918 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2021-07-09 18:16:57,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:57,919 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-07-09 18:16:57,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-07-09 18:16:57,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:16:57,919 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:57,919 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:58,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-09 18:16:58,137 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:58,137 INFO L82 PathProgramCache]: Analyzing trace with hash 831812391, now seen corresponding path program 1 times [2021-07-09 18:16:58,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:58,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375038859] [2021-07-09 18:16:58,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:58,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:58,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:58,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:58,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375038859] [2021-07-09 18:16:58,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375038859] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:58,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:58,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:16:58,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406298452] [2021-07-09 18:16:58,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:16:58,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:58,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:16:58,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:16:58,189 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:58,257 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2021-07-09 18:16:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:16:58,258 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 18:16:58,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:58,259 INFO L225 Difference]: With dead ends: 71 [2021-07-09 18:16:58,259 INFO L226 Difference]: Without dead ends: 66 [2021-07-09 18:16:58,259 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:16:58,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-07-09 18:16:58,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2021-07-09 18:16:58,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2021-07-09 18:16:58,270 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2021-07-09 18:16:58,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:58,270 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2021-07-09 18:16:58,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,270 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2021-07-09 18:16:58,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:16:58,270 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:58,271 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:58,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 18:16:58,271 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:58,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:58,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1002480409, now seen corresponding path program 2 times [2021-07-09 18:16:58,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:58,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326236265] [2021-07-09 18:16:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:58,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:58,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:58,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:58,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326236265] [2021-07-09 18:16:58,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326236265] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:58,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:58,308 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:16:58,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933367163] [2021-07-09 18:16:58,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:16:58,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:58,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:16:58,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:16:58,310 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:58,349 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2021-07-09 18:16:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 18:16:58,350 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 18:16:58,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:58,353 INFO L225 Difference]: With dead ends: 51 [2021-07-09 18:16:58,353 INFO L226 Difference]: Without dead ends: 51 [2021-07-09 18:16:58,353 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 32.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:16:58,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-07-09 18:16:58,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-07-09 18:16:58,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2021-07-09 18:16:58,365 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2021-07-09 18:16:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:58,366 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2021-07-09 18:16:58,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,366 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2021-07-09 18:16:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-07-09 18:16:58,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:58,366 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:58,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-09 18:16:58,367 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:58,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:58,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1334159197, now seen corresponding path program 2 times [2021-07-09 18:16:58,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:58,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306592074] [2021-07-09 18:16:58,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:58,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:58,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:58,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:58,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306592074] [2021-07-09 18:16:58,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306592074] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 18:16:58,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 18:16:58,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-09 18:16:58,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470012579] [2021-07-09 18:16:58,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 18:16:58,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:58,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 18:16:58,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-07-09 18:16:58,406 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:58,459 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-07-09 18:16:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:16:58,460 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-07-09 18:16:58,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:58,460 INFO L225 Difference]: With dead ends: 51 [2021-07-09 18:16:58,460 INFO L226 Difference]: Without dead ends: 49 [2021-07-09 18:16:58,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 18:16:58,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-07-09 18:16:58,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-07-09 18:16:58,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-07-09 18:16:58,469 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-07-09 18:16:58,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:58,469 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-07-09 18:16:58,469 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,469 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-07-09 18:16:58,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:16:58,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:58,470 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:58,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 18:16:58,470 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:58,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:58,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1624375643, now seen corresponding path program 1 times [2021-07-09 18:16:58,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:58,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766839396] [2021-07-09 18:16:58,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:58,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:58,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:58,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766839396] [2021-07-09 18:16:58,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766839396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:58,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810565631] [2021-07-09 18:16:58,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:58,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:58,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:16:58,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:58,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:58,818 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 19 treesize of output 7 [2021-07-09 18:16:58,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:58,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:58,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:58,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-07-09 18:16:58,846 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:58,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810565631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:58,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:58,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:16:58,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558113043] [2021-07-09 18:16:58,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:16:58,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:58,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:16:58,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:16:58,847 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:58,884 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-07-09 18:16:58,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:16:58,884 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:16:58,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:58,885 INFO L225 Difference]: With dead ends: 86 [2021-07-09 18:16:58,885 INFO L226 Difference]: Without dead ends: 79 [2021-07-09 18:16:58,885 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 88.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:16:58,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-07-09 18:16:58,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-07-09 18:16:58,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-07-09 18:16:58,888 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2021-07-09 18:16:58,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:58,888 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-07-09 18:16:58,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-07-09 18:16:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-09 18:16:58,888 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:58,889 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:59,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:59,105 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:59,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:59,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1933122355, now seen corresponding path program 2 times [2021-07-09 18:16:59,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:59,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218164054] [2021-07-09 18:16:59,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:59,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:59,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:59,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218164054] [2021-07-09 18:16:59,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218164054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:59,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760932858] [2021-07-09 18:16:59,170 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:59,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:16:59,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:16:59,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:59,327 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:16:59,328 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 19 treesize of output 7 [2021-07-09 18:16:59,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:16:59,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:16:59,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:16:59,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-07-09 18:16:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:59,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760932858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:59,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:59,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 18:16:59,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428178184] [2021-07-09 18:16:59,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 18:16:59,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:59,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 18:16:59,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:16:59,355 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:59,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:16:59,390 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2021-07-09 18:16:59,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 18:16:59,391 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-09 18:16:59,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:16:59,391 INFO L225 Difference]: With dead ends: 94 [2021-07-09 18:16:59,391 INFO L226 Difference]: Without dead ends: 87 [2021-07-09 18:16:59,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 18:16:59,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-07-09 18:16:59,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-07-09 18:16:59,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-07-09 18:16:59,396 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2021-07-09 18:16:59,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:16:59,397 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-07-09 18:16:59,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:16:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-07-09 18:16:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:16:59,398 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:16:59,398 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:16:59,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:59,613 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:16:59,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:16:59,613 INFO L82 PathProgramCache]: Analyzing trace with hash 210936483, now seen corresponding path program 3 times [2021-07-09 18:16:59,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:16:59,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913735431] [2021-07-09 18:16:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:16:59,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:16:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:59,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:16:59,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913735431] [2021-07-09 18:16:59,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913735431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:59,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194982829] [2021-07-09 18:16:59,661 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:16:59,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:16:59,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:16:59,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:16:59,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:16:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:16:59,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194982829] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:16:59,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:16:59,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-07-09 18:16:59,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145734160] [2021-07-09 18:16:59,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 18:16:59,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:16:59,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 18:16:59,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:16:59,814 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:00,082 INFO L93 Difference]: Finished difference Result 176 states and 326 transitions. [2021-07-09 18:17:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:17:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 20 [2021-07-09 18:17:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:00,083 INFO L225 Difference]: With dead ends: 176 [2021-07-09 18:17:00,083 INFO L226 Difference]: Without dead ends: 176 [2021-07-09 18:17:00,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 248.2ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:17:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-07-09 18:17:00,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 73. [2021-07-09 18:17:00,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-07-09 18:17:00,087 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2021-07-09 18:17:00,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:00,087 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-07-09 18:17:00,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,087 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-07-09 18:17:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:00,087 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:00,088 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:00,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:00,289 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:00,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:00,289 INFO L82 PathProgramCache]: Analyzing trace with hash -492203993, now seen corresponding path program 4 times [2021-07-09 18:17:00,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:00,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597250222] [2021-07-09 18:17:00,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:00,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:00,326 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:00,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:00,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597250222] [2021-07-09 18:17:00,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597250222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:00,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415741346] [2021-07-09 18:17:00,327 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:00,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:00,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:00,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:17:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:00,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:00,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415741346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:00,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:00,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:17:00,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322554165] [2021-07-09 18:17:00,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:00,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:00,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:00,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:00,427 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:00,707 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2021-07-09 18:17:00,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 18:17:00,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 20 [2021-07-09 18:17:00,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:00,708 INFO L225 Difference]: With dead ends: 219 [2021-07-09 18:17:00,708 INFO L226 Difference]: Without dead ends: 205 [2021-07-09 18:17:00,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 232.0ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:17:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-07-09 18:17:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2021-07-09 18:17:00,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-07-09 18:17:00,712 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2021-07-09 18:17:00,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:00,712 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-07-09 18:17:00,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:00,712 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-07-09 18:17:00,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:00,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:00,713 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:00,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:00,914 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:00,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:00,914 INFO L82 PathProgramCache]: Analyzing trace with hash 97165543, now seen corresponding path program 5 times [2021-07-09 18:17:00,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:00,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060902398] [2021-07-09 18:17:00,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:00,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:00,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:00,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060902398] [2021-07-09 18:17:00,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060902398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:00,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690370134] [2021-07-09 18:17:00,958 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:17:01,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:17:01,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:01,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:01,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:01,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690370134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:01,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:01,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 18:17:01,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453821593] [2021-07-09 18:17:01,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:17:01,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:01,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:17:01,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:17:01,120 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:01,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:01,342 INFO L93 Difference]: Finished difference Result 208 states and 404 transitions. [2021-07-09 18:17:01,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:17:01,342 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:17:01,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:01,343 INFO L225 Difference]: With dead ends: 208 [2021-07-09 18:17:01,343 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 18:17:01,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:17:01,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 18:17:01,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-07-09 18:17:01,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:01,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2021-07-09 18:17:01,348 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2021-07-09 18:17:01,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:01,348 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2021-07-09 18:17:01,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:01,348 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2021-07-09 18:17:01,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:01,349 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:01,349 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:01,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:01,565 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:01,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:01,566 INFO L82 PathProgramCache]: Analyzing trace with hash -234513245, now seen corresponding path program 6 times [2021-07-09 18:17:01,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:01,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134083468] [2021-07-09 18:17:01,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:01,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:01,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134083468] [2021-07-09 18:17:01,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134083468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:01,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141026800] [2021-07-09 18:17:01,603 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:01,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:17:01,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:01,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:17:01,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:01,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:01,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141026800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:01,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:01,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 18:17:01,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464927405] [2021-07-09 18:17:01,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:17:01,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:01,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:17:01,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:17:01,706 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:01,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:01,913 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2021-07-09 18:17:01,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:17:01,914 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:17:01,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:01,914 INFO L225 Difference]: With dead ends: 205 [2021-07-09 18:17:01,914 INFO L226 Difference]: Without dead ends: 203 [2021-07-09 18:17:01,915 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 186.6ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:17:01,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-07-09 18:17:01,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2021-07-09 18:17:01,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:01,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-07-09 18:17:01,919 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2021-07-09 18:17:01,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:01,919 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-07-09 18:17:01,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:01,919 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-07-09 18:17:01,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:01,920 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:01,920 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:02,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:02,136 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:02,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:02,137 INFO L82 PathProgramCache]: Analyzing trace with hash -2122602315, now seen corresponding path program 7 times [2021-07-09 18:17:02,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:02,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289379228] [2021-07-09 18:17:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:02,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:02,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:02,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289379228] [2021-07-09 18:17:02,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289379228] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:02,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525001945] [2021-07-09 18:17:02,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:02,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:02,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:17:02,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:02,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:02,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525001945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:02,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:02,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:17:02,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643392913] [2021-07-09 18:17:02,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:02,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:02,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:02,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:02,268 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:02,527 INFO L93 Difference]: Finished difference Result 300 states and 609 transitions. [2021-07-09 18:17:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:17:02,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 20 [2021-07-09 18:17:02,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:02,547 INFO L225 Difference]: With dead ends: 300 [2021-07-09 18:17:02,547 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 18:17:02,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 201.1ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:17:02,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 18:17:02,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 165. [2021-07-09 18:17:02,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:02,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2021-07-09 18:17:02,553 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2021-07-09 18:17:02,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:02,553 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2021-07-09 18:17:02,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:02,554 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2021-07-09 18:17:02,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:02,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:02,554 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:02,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-07-09 18:17:02,758 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:02,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:02,759 INFO L82 PathProgramCache]: Analyzing trace with hash -530595531, now seen corresponding path program 8 times [2021-07-09 18:17:02,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:02,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630288602] [2021-07-09 18:17:02,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:02,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:02,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:02,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:02,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630288602] [2021-07-09 18:17:02,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630288602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:02,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72464559] [2021-07-09 18:17:02,826 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:02,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:02,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:02,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:17:02,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:02,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:02,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72464559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:02,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:02,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 18:17:02,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947320059] [2021-07-09 18:17:02,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:17:02,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:02,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:17:02,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:17:02,957 INFO L87 Difference]: Start difference. First operand 165 states and 376 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) [2021-07-09 18:17:03,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:03,157 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-07-09 18:17:03,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 18:17:03,158 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 20 [2021-07-09 18:17:03,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:03,159 INFO L225 Difference]: With dead ends: 238 [2021-07-09 18:17:03,159 INFO L226 Difference]: Without dead ends: 235 [2021-07-09 18:17:03,159 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 179.7ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:17:03,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-07-09 18:17:03,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2021-07-09 18:17:03,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2021-07-09 18:17:03,163 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2021-07-09 18:17:03,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:03,163 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2021-07-09 18:17:03,163 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) [2021-07-09 18:17:03,163 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2021-07-09 18:17:03,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:03,164 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:03,164 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:03,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:03,380 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:03,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:03,381 INFO L82 PathProgramCache]: Analyzing trace with hash 420283757, now seen corresponding path program 9 times [2021-07-09 18:17:03,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:03,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107965297] [2021-07-09 18:17:03,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:03,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:03,425 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:03,425 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:03,425 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107965297] [2021-07-09 18:17:03,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107965297] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:03,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260953407] [2021-07-09 18:17:03,426 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:03,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 18:17:03,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:03,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:17:03,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:03,565 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:03,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260953407] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:03,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:03,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-07-09 18:17:03,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433016334] [2021-07-09 18:17:03,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 18:17:03,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:03,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 18:17:03,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-09 18:17:03,566 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:03,765 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2021-07-09 18:17:03,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 18:17:03,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:17:03,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:03,767 INFO L225 Difference]: With dead ends: 302 [2021-07-09 18:17:03,767 INFO L226 Difference]: Without dead ends: 300 [2021-07-09 18:17:03,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 221.3ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:17:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-07-09 18:17:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2021-07-09 18:17:03,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2021-07-09 18:17:03,772 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2021-07-09 18:17:03,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:03,772 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2021-07-09 18:17:03,772 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:03,772 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2021-07-09 18:17:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 18:17:03,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:03,773 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:03,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:03,988 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:03,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:03,989 INFO L82 PathProgramCache]: Analyzing trace with hash -86062509, now seen corresponding path program 10 times [2021-07-09 18:17:03,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:03,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796332953] [2021-07-09 18:17:03,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:03,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:04,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:04,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:04,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796332953] [2021-07-09 18:17:04,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796332953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:04,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862120162] [2021-07-09 18:17:04,044 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:04,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:04,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:04,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 18:17:04,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:04,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:04,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862120162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:04,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:04,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-09 18:17:04,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514033305] [2021-07-09 18:17:04,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:04,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:04,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:04,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:04,158 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:04,376 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2021-07-09 18:17:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 18:17:04,376 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 18:17:04,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:04,377 INFO L225 Difference]: With dead ends: 302 [2021-07-09 18:17:04,377 INFO L226 Difference]: Without dead ends: 296 [2021-07-09 18:17:04,378 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:17:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-07-09 18:17:04,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-07-09 18:17:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-07-09 18:17:04,382 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2021-07-09 18:17:04,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:04,382 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-07-09 18:17:04,383 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,383 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-07-09 18:17:04,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:04,383 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:04,383 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:04,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-09 18:17:04,599 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:04,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:04,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1988809563, now seen corresponding path program 11 times [2021-07-09 18:17:04,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:04,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515837423] [2021-07-09 18:17:04,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:04,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:04,686 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:04,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515837423] [2021-07-09 18:17:04,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515837423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:04,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841068260] [2021-07-09 18:17:04,686 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:04,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 18:17:04,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:04,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:17:04,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:04,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:04,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:04,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:04,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:04,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select 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 7 [2021-07-09 18:17:04,872 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:04,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:04,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:04,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-07-09 18:17:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:04,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841068260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:04,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:04,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:17:04,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268126185] [2021-07-09 18:17:04,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:04,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:04,894 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:04,982 INFO L93 Difference]: Finished difference Result 282 states and 622 transitions. [2021-07-09 18:17:04,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:17:04,983 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) 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 22 [2021-07-09 18:17:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:04,984 INFO L225 Difference]: With dead ends: 282 [2021-07-09 18:17:04,984 INFO L226 Difference]: Without dead ends: 257 [2021-07-09 18:17:04,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 119.7ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:04,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-07-09 18:17:04,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 214. [2021-07-09 18:17:04,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3427230046948355) internal successors, (499), 213 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 499 transitions. [2021-07-09 18:17:04,988 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 499 transitions. Word has length 22 [2021-07-09 18:17:04,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:04,988 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 499 transitions. [2021-07-09 18:17:04,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:04,988 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 499 transitions. [2021-07-09 18:17:04,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:04,989 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:04,989 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:05,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-09 18:17:05,206 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:05,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:05,206 INFO L82 PathProgramCache]: Analyzing trace with hash 197742959, now seen corresponding path program 12 times [2021-07-09 18:17:05,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:05,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611175970] [2021-07-09 18:17:05,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:05,294 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:05,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:05,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611175970] [2021-07-09 18:17:05,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611175970] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:05,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324827135] [2021-07-09 18:17:05,295 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:05,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:17:05,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:05,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:17:05,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:05,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:05,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:05,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:05,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2021-07-09 18:17:05,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:05,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:05,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-07-09 18:17:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:05,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324827135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:05,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:05,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:17:05,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956259092] [2021-07-09 18:17:05,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:05,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:05,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:05,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:05,516 INFO L87 Difference]: Start difference. First operand 214 states and 499 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:05,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:05,614 INFO L93 Difference]: Finished difference Result 256 states and 583 transitions. [2021-07-09 18:17:05,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:17:05,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) 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 22 [2021-07-09 18:17:05,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:05,616 INFO L225 Difference]: With dead ends: 256 [2021-07-09 18:17:05,616 INFO L226 Difference]: Without dead ends: 247 [2021-07-09 18:17:05,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-09 18:17:05,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-07-09 18:17:05,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-07-09 18:17:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3529411764705883) internal successors, (520), 221 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:05,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 520 transitions. [2021-07-09 18:17:05,620 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 520 transitions. Word has length 22 [2021-07-09 18:17:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:05,620 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 520 transitions. [2021-07-09 18:17:05,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 520 transitions. [2021-07-09 18:17:05,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:05,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:05,621 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:05,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 18:17:05,837 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:05,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:05,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1748301367, now seen corresponding path program 13 times [2021-07-09 18:17:05,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:05,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188414537] [2021-07-09 18:17:05,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:05,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:05,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188414537] [2021-07-09 18:17:05,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188414537] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:05,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999561279] [2021-07-09 18:17:05,929 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:17:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:05,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:17:05,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:06,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:06,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:06,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:06,082 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:06,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2021-07-09 18:17:06,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:06,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:06,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:06,089 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-07-09 18:17:06,104 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:06,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999561279] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:06,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:06,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:17:06,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633516617] [2021-07-09 18:17:06,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:06,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:06,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:06,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:06,105 INFO L87 Difference]: Start difference. First operand 222 states and 520 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:06,232 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-07-09 18:17:06,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 18:17:06,232 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) 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 22 [2021-07-09 18:17:06,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:06,233 INFO L225 Difference]: With dead ends: 301 [2021-07-09 18:17:06,233 INFO L226 Difference]: Without dead ends: 278 [2021-07-09 18:17:06,233 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:06,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-07-09 18:17:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2021-07-09 18:17:06,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.3584070796460175) internal successors, (533), 226 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 533 transitions. [2021-07-09 18:17:06,237 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 533 transitions. Word has length 22 [2021-07-09 18:17:06,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:06,238 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 533 transitions. [2021-07-09 18:17:06,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,238 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 533 transitions. [2021-07-09 18:17:06,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-07-09 18:17:06,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:06,238 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:06,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:06,453 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:06,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:06,454 INFO L82 PathProgramCache]: Analyzing trace with hash 343984883, now seen corresponding path program 14 times [2021-07-09 18:17:06,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:06,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200820105] [2021-07-09 18:17:06,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:06,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:06,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:06,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:06,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200820105] [2021-07-09 18:17:06,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200820105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:06,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337535688] [2021-07-09 18:17:06,526 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:06,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:06,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:06,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 18:17:06,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:06,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:06,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:06,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:06,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:06,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 7 [2021-07-09 18:17:06,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:06,648 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:06,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:06,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-07-09 18:17:06,666 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:06,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337535688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:06,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:06,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-09 18:17:06,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315048346] [2021-07-09 18:17:06,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 18:17:06,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:06,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 18:17:06,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:06,667 INFO L87 Difference]: Start difference. First operand 227 states and 533 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:06,761 INFO L93 Difference]: Finished difference Result 320 states and 703 transitions. [2021-07-09 18:17:06,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 18:17:06,762 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) 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 22 [2021-07-09 18:17:06,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:06,763 INFO L225 Difference]: With dead ends: 320 [2021-07-09 18:17:06,763 INFO L226 Difference]: Without dead ends: 313 [2021-07-09 18:17:06,763 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 110.7ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-09 18:17:06,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-07-09 18:17:06,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 246. [2021-07-09 18:17:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.363265306122449) internal successors, (579), 245 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 579 transitions. [2021-07-09 18:17:06,768 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 579 transitions. Word has length 22 [2021-07-09 18:17:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:06,768 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 579 transitions. [2021-07-09 18:17:06,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:06,768 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 579 transitions. [2021-07-09 18:17:06,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:06,769 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:06,769 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:06,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:06,986 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:06,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:06,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1412718173, now seen corresponding path program 15 times [2021-07-09 18:17:06,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:06,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148012901] [2021-07-09 18:17:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:06,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:07,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:07,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148012901] [2021-07-09 18:17:07,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148012901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:07,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993435387] [2021-07-09 18:17:07,051 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:07,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:17:07,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:07,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:07,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:07,185 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:07,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993435387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:07,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:07,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-07-09 18:17:07,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757940691] [2021-07-09 18:17:07,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:17:07,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:07,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:17:07,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:07,187 INFO L87 Difference]: Start difference. First operand 246 states and 579 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:07,642 INFO L93 Difference]: Finished difference Result 495 states and 1055 transitions. [2021-07-09 18:17:07,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:17:07,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 24 [2021-07-09 18:17:07,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:07,644 INFO L225 Difference]: With dead ends: 495 [2021-07-09 18:17:07,644 INFO L226 Difference]: Without dead ends: 495 [2021-07-09 18:17:07,644 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:17:07,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-07-09 18:17:07,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 238. [2021-07-09 18:17:07,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.3628691983122363) internal successors, (560), 237 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:07,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 560 transitions. [2021-07-09 18:17:07,650 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 560 transitions. Word has length 24 [2021-07-09 18:17:07,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:07,650 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 560 transitions. [2021-07-09 18:17:07,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:07,650 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 560 transitions. [2021-07-09 18:17:07,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:07,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:07,651 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:07,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:07,870 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:07,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:07,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1474117159, now seen corresponding path program 16 times [2021-07-09 18:17:07,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:07,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394922784] [2021-07-09 18:17:07,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:07,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:07,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:07,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394922784] [2021-07-09 18:17:07,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394922784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:07,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354741897] [2021-07-09 18:17:07,914 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:07,990 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:07,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:07,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:07,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:08,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354741897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:08,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:08,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:17:08,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542439076] [2021-07-09 18:17:08,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:17:08,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:08,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:17:08,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:08,110 INFO L87 Difference]: Start difference. First operand 238 states and 560 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:08,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:08,706 INFO L93 Difference]: Finished difference Result 696 states and 1431 transitions. [2021-07-09 18:17:08,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:17:08,707 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:17:08,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:08,709 INFO L225 Difference]: With dead ends: 696 [2021-07-09 18:17:08,709 INFO L226 Difference]: Without dead ends: 652 [2021-07-09 18:17:08,709 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 535.4ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:17:08,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-07-09 18:17:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 294. [2021-07-09 18:17:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.378839590443686) internal successors, (697), 293 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 697 transitions. [2021-07-09 18:17:08,717 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 697 transitions. Word has length 24 [2021-07-09 18:17:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:08,717 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 697 transitions. [2021-07-09 18:17:08,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 697 transitions. [2021-07-09 18:17:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:08,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:08,718 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:08,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-09 18:17:08,935 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:08,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:08,935 INFO L82 PathProgramCache]: Analyzing trace with hash -964250137, now seen corresponding path program 17 times [2021-07-09 18:17:08,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:08,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753975509] [2021-07-09 18:17:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:08,977 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:08,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:08,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753975509] [2021-07-09 18:17:08,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753975509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:08,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189975590] [2021-07-09 18:17:08,978 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 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 [2021-07-09 18:17:08,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:08,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:09,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:09,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:09,105 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:09,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189975590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:09,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:09,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 18:17:09,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489411962] [2021-07-09 18:17:09,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:17:09,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:09,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:17:09,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:09,106 INFO L87 Difference]: Start difference. First operand 294 states and 697 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:09,599 INFO L93 Difference]: Finished difference Result 654 states and 1426 transitions. [2021-07-09 18:17:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:17:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) 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 24 [2021-07-09 18:17:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:09,601 INFO L225 Difference]: With dead ends: 654 [2021-07-09 18:17:09,601 INFO L226 Difference]: Without dead ends: 652 [2021-07-09 18:17:09,601 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 413.5ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:17:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-07-09 18:17:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 362. [2021-07-09 18:17:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4238227146814406) internal successors, (875), 361 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 875 transitions. [2021-07-09 18:17:09,611 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 875 transitions. Word has length 24 [2021-07-09 18:17:09,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:09,611 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 875 transitions. [2021-07-09 18:17:09,611 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:09,611 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 875 transitions. [2021-07-09 18:17:09,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:09,612 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:09,612 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:09,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-07-09 18:17:09,829 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:09,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:09,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1295928925, now seen corresponding path program 18 times [2021-07-09 18:17:09,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:09,829 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542400193] [2021-07-09 18:17:09,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:09,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:09,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:09,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542400193] [2021-07-09 18:17:09,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542400193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:09,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467615324] [2021-07-09 18:17:09,867 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:09,891 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:17:09,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:09,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:10,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467615324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:10,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:10,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 18:17:10,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078119252] [2021-07-09 18:17:10,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:17:10,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:10,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:17:10,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:10,020 INFO L87 Difference]: Start difference. First operand 362 states and 875 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:10,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:10,439 INFO L93 Difference]: Finished difference Result 539 states and 1206 transitions. [2021-07-09 18:17:10,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:17:10,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) 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 24 [2021-07-09 18:17:10,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:10,441 INFO L225 Difference]: With dead ends: 539 [2021-07-09 18:17:10,441 INFO L226 Difference]: Without dead ends: 535 [2021-07-09 18:17:10,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 388.7ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:17:10,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-07-09 18:17:10,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 362. [2021-07-09 18:17:10,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4210526315789473) internal successors, (874), 361 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 874 transitions. [2021-07-09 18:17:10,461 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 874 transitions. Word has length 24 [2021-07-09 18:17:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:10,462 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 874 transitions. [2021-07-09 18:17:10,462 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 874 transitions. [2021-07-09 18:17:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:10,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:10,462 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:10,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 18:17:10,663 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:10,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1782884239, now seen corresponding path program 19 times [2021-07-09 18:17:10,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:10,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546794591] [2021-07-09 18:17:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:10,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:10,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:10,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546794591] [2021-07-09 18:17:10,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546794591] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:10,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415323976] [2021-07-09 18:17:10,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:10,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:10,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:10,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415323976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:10,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:10,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 18:17:10,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508005990] [2021-07-09 18:17:10,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:17:10,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:10,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:17:10,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:10,835 INFO L87 Difference]: Start difference. First operand 362 states and 874 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:11,172 INFO L93 Difference]: Finished difference Result 593 states and 1318 transitions. [2021-07-09 18:17:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:17:11,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) 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 24 [2021-07-09 18:17:11,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:11,174 INFO L225 Difference]: With dead ends: 593 [2021-07-09 18:17:11,174 INFO L226 Difference]: Without dead ends: 584 [2021-07-09 18:17:11,174 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 285.7ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:17:11,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-07-09 18:17:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 383. [2021-07-09 18:17:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.4424083769633507) internal successors, (933), 382 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 933 transitions. [2021-07-09 18:17:11,182 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 933 transitions. Word has length 24 [2021-07-09 18:17:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:11,182 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 933 transitions. [2021-07-09 18:17:11,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 933 transitions. [2021-07-09 18:17:11,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:11,183 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:11,183 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:11,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-09 18:17:11,399 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:11,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:11,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1338351217, now seen corresponding path program 20 times [2021-07-09 18:17:11,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:11,400 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116484657] [2021-07-09 18:17:11,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:11,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:11,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116484657] [2021-07-09 18:17:11,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116484657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:11,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344395455] [2021-07-09 18:17:11,444 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:11,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:11,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:11,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:11,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:11,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344395455] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:11,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:11,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:17:11,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399620170] [2021-07-09 18:17:11,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:11,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:11,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:11,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:11,581 INFO L87 Difference]: Start difference. First operand 383 states and 933 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:12,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:12,054 INFO L93 Difference]: Finished difference Result 701 states and 1556 transitions. [2021-07-09 18:17:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:17:12,054 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 24 [2021-07-09 18:17:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:12,056 INFO L225 Difference]: With dead ends: 701 [2021-07-09 18:17:12,056 INFO L226 Difference]: Without dead ends: 687 [2021-07-09 18:17:12,057 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 400.3ms TimeCoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:17:12,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-07-09 18:17:12,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 386. [2021-07-09 18:17:12,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.4363636363636365) internal successors, (938), 385 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 938 transitions. [2021-07-09 18:17:12,065 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 938 transitions. Word has length 24 [2021-07-09 18:17:12,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:12,065 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 938 transitions. [2021-07-09 18:17:12,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:12,065 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 938 transitions. [2021-07-09 18:17:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:12,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:12,066 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:12,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-09 18:17:12,282 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:12,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:12,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1334899385, now seen corresponding path program 21 times [2021-07-09 18:17:12,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:12,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082499831] [2021-07-09 18:17:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:12,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:12,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:12,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:12,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082499831] [2021-07-09 18:17:12,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082499831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:12,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719556075] [2021-07-09 18:17:12,341 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:12,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:17:12,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:12,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:12,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:12,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719556075] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:12,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:12,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:17:12,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290562652] [2021-07-09 18:17:12,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:17:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:12,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:17:12,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:12,481 INFO L87 Difference]: Start difference. First operand 386 states and 938 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:12,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:12,887 INFO L93 Difference]: Finished difference Result 817 states and 1787 transitions. [2021-07-09 18:17:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 18:17:12,908 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-07-09 18:17:12,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:12,911 INFO L225 Difference]: With dead ends: 817 [2021-07-09 18:17:12,911 INFO L226 Difference]: Without dead ends: 817 [2021-07-09 18:17:12,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:17:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-07-09 18:17:12,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 408. [2021-07-09 18:17:12,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.407862407862408) internal successors, (980), 407 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:12,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 980 transitions. [2021-07-09 18:17:12,920 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 980 transitions. Word has length 24 [2021-07-09 18:17:12,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:12,920 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 980 transitions. [2021-07-09 18:17:12,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:12,920 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 980 transitions. [2021-07-09 18:17:12,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:12,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:12,921 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:13,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:13,139 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2049905863, now seen corresponding path program 22 times [2021-07-09 18:17:13,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:13,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139055182] [2021-07-09 18:17:13,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:13,178 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:13,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:13,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139055182] [2021-07-09 18:17:13,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139055182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:13,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897842169] [2021-07-09 18:17:13,178 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:13,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:13,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:13,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:13,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:13,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897842169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:13,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:13,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:17:13,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271657481] [2021-07-09 18:17:13,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:13,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:13,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:13,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:13,297 INFO L87 Difference]: Start difference. First operand 408 states and 980 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:13,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:13,659 INFO L93 Difference]: Finished difference Result 578 states and 1266 transitions. [2021-07-09 18:17:13,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 18:17:13,659 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 24 [2021-07-09 18:17:13,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:13,661 INFO L225 Difference]: With dead ends: 578 [2021-07-09 18:17:13,661 INFO L226 Difference]: Without dead ends: 560 [2021-07-09 18:17:13,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:17:13,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-07-09 18:17:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-07-09 18:17:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.398034398034398) internal successors, (976), 407 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 976 transitions. [2021-07-09 18:17:13,668 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 976 transitions. Word has length 24 [2021-07-09 18:17:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:13,668 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 976 transitions. [2021-07-09 18:17:13,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:13,668 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 976 transitions. [2021-07-09 18:17:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:13,669 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:13,669 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:13,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 18:17:13,884 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:13,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:13,885 INFO L82 PathProgramCache]: Analyzing trace with hash -275355531, now seen corresponding path program 23 times [2021-07-09 18:17:13,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:13,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401984274] [2021-07-09 18:17:13,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:13,932 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:13,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:13,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401984274] [2021-07-09 18:17:13,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401984274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:13,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868352403] [2021-07-09 18:17:13,933 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:13,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:13,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:13,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:13,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:14,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868352403] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:14,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:14,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:17:14,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539139180] [2021-07-09 18:17:14,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:14,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:14,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:14,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:14,082 INFO L87 Difference]: Start difference. First operand 408 states and 976 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:14,596 INFO L93 Difference]: Finished difference Result 943 states and 2146 transitions. [2021-07-09 18:17:14,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:17:14,596 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 24 [2021-07-09 18:17:14,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:14,602 INFO L225 Difference]: With dead ends: 943 [2021-07-09 18:17:14,602 INFO L226 Difference]: Without dead ends: 943 [2021-07-09 18:17:14,603 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:17:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-07-09 18:17:14,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 633. [2021-07-09 18:17:14,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.4857594936708862) internal successors, (1571), 632 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1571 transitions. [2021-07-09 18:17:14,628 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1571 transitions. Word has length 24 [2021-07-09 18:17:14,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:14,628 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1571 transitions. [2021-07-09 18:17:14,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:14,628 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1571 transitions. [2021-07-09 18:17:14,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:14,629 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:14,629 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:14,845 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:14,845 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:14,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:14,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2027436755, now seen corresponding path program 24 times [2021-07-09 18:17:14,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:14,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930123292] [2021-07-09 18:17:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:14,885 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:14,885 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:14,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930123292] [2021-07-09 18:17:14,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930123292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:14,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133697380] [2021-07-09 18:17:14,885 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:14,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:17:14,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:14,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:14,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:15,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133697380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:15,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:15,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-07-09 18:17:15,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224483225] [2021-07-09 18:17:15,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 18:17:15,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:15,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 18:17:15,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-07-09 18:17:15,013 INFO L87 Difference]: Start difference. First operand 633 states and 1571 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:15,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:15,392 INFO L93 Difference]: Finished difference Result 910 states and 2079 transitions. [2021-07-09 18:17:15,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 18:17:15,393 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) 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 24 [2021-07-09 18:17:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:15,395 INFO L225 Difference]: With dead ends: 910 [2021-07-09 18:17:15,396 INFO L226 Difference]: Without dead ends: 906 [2021-07-09 18:17:15,397 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 336.4ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 18:17:15,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-07-09 18:17:15,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 633. [2021-07-09 18:17:15,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.481012658227848) internal successors, (1568), 632 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:15,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1568 transitions. [2021-07-09 18:17:15,423 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1568 transitions. Word has length 24 [2021-07-09 18:17:15,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:15,424 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1568 transitions. [2021-07-09 18:17:15,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:15,424 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1568 transitions. [2021-07-09 18:17:15,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:15,425 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:15,425 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:15,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 18:17:15,641 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:15,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1761184275, now seen corresponding path program 25 times [2021-07-09 18:17:15,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:15,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693766444] [2021-07-09 18:17:15,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:15,701 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:15,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:15,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693766444] [2021-07-09 18:17:15,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693766444] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:15,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941259289] [2021-07-09 18:17:15,701 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:15,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:15,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:15,846 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:15,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941259289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:15,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:15,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-07-09 18:17:15,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163316840] [2021-07-09 18:17:15,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 18:17:15,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:15,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 18:17:15,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-07-09 18:17:15,848 INFO L87 Difference]: Start difference. First operand 633 states and 1568 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:16,200 INFO L93 Difference]: Finished difference Result 997 states and 2276 transitions. [2021-07-09 18:17:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 18:17:16,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 24 [2021-07-09 18:17:16,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:16,203 INFO L225 Difference]: With dead ends: 997 [2021-07-09 18:17:16,204 INFO L226 Difference]: Without dead ends: 985 [2021-07-09 18:17:16,204 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 349.8ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 18:17:16,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-07-09 18:17:16,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 684. [2021-07-09 18:17:16,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4963396778916547) internal successors, (1705), 683 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:16,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1705 transitions. [2021-07-09 18:17:16,216 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1705 transitions. Word has length 24 [2021-07-09 18:17:16,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:16,216 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1705 transitions. [2021-07-09 18:17:16,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:16,216 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1705 transitions. [2021-07-09 18:17:16,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-09 18:17:16,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:16,217 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:16,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:16,433 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:16,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1533962895, now seen corresponding path program 26 times [2021-07-09 18:17:16,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:16,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111484000] [2021-07-09 18:17:16,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:16,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:16,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111484000] [2021-07-09 18:17:16,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111484000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:16,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582256065] [2021-07-09 18:17:16,482 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:16,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:16,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:16,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 18:17:16,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:16,611 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:16,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582256065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:16,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:16,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-07-09 18:17:16,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569148322] [2021-07-09 18:17:16,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 18:17:16,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:16,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 18:17:16,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-07-09 18:17:16,612 INFO L87 Difference]: Start difference. First operand 684 states and 1705 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:17,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:17,055 INFO L93 Difference]: Finished difference Result 1028 states and 2383 transitions. [2021-07-09 18:17:17,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:17:17,055 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 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 24 [2021-07-09 18:17:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:17,058 INFO L225 Difference]: With dead ends: 1028 [2021-07-09 18:17:17,058 INFO L226 Difference]: Without dead ends: 1008 [2021-07-09 18:17:17,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:17:17,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-07-09 18:17:17,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 740. [2021-07-09 18:17:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.5087956698240865) internal successors, (1854), 739 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1854 transitions. [2021-07-09 18:17:17,070 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1854 transitions. Word has length 24 [2021-07-09 18:17:17,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:17,070 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1854 transitions. [2021-07-09 18:17:17,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:17,070 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1854 transitions. [2021-07-09 18:17:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:17,071 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:17,071 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:17,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-09 18:17:17,287 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1047161765, now seen corresponding path program 27 times [2021-07-09 18:17:17,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:17,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888965589] [2021-07-09 18:17:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:17,511 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:17,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:17,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888965589] [2021-07-09 18:17:17,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888965589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:17,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983002761] [2021-07-09 18:17:17,511 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:17,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 18:17:17,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:17,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:17:17,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:17,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:17,962 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:17,963 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:17,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:17,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-07-09 18:17:18,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:17:18,035 INFO L628 ElimStorePlain]: treesize reduction 52, result has 40.2 percent of original size [2021-07-09 18:17:18,042 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:17:18,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-07-09 18:17:18,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:18,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983002761] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:18,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:18,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-07-09 18:17:18,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508874090] [2021-07-09 18:17:18,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:17:18,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:17:18,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:17:18,089 INFO L87 Difference]: Start difference. First operand 740 states and 1854 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:19,142 INFO L93 Difference]: Finished difference Result 1044 states and 2520 transitions. [2021-07-09 18:17:19,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:17:19,143 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:19,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:19,146 INFO L225 Difference]: With dead ends: 1044 [2021-07-09 18:17:19,146 INFO L226 Difference]: Without dead ends: 1030 [2021-07-09 18:17:19,146 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1150.5ms TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2021-07-09 18:17:19,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-07-09 18:17:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 756. [2021-07-09 18:17:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.508609271523179) internal successors, (1894), 755 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1894 transitions. [2021-07-09 18:17:19,157 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1894 transitions. Word has length 26 [2021-07-09 18:17:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:19,157 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1894 transitions. [2021-07-09 18:17:19,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:19,157 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1894 transitions. [2021-07-09 18:17:19,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:19,159 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:19,159 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:19,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:19,375 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:19,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:19,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1487367885, now seen corresponding path program 28 times [2021-07-09 18:17:19,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:19,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031751733] [2021-07-09 18:17:19,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:19,679 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:19,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:19,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031751733] [2021-07-09 18:17:19,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031751733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:19,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858877084] [2021-07-09 18:17:19,680 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 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 [2021-07-09 18:17:19,702 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:19,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:19,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:17:19,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:19,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:19,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-09 18:17:19,894 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:19,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:19,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:19,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-09 18:17:19,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:19,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858877084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:19,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:19,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-09 18:17:19,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311501447] [2021-07-09 18:17:19,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:19,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:19,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:19,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:19,920 INFO L87 Difference]: Start difference. First operand 756 states and 1894 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:20,937 INFO L93 Difference]: Finished difference Result 1114 states and 2686 transitions. [2021-07-09 18:17:20,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:17:20,937 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:20,941 INFO L225 Difference]: With dead ends: 1114 [2021-07-09 18:17:20,941 INFO L226 Difference]: Without dead ends: 1066 [2021-07-09 18:17:20,942 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1027.9ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:17:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-07-09 18:17:20,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 785. [2021-07-09 18:17:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.489795918367347) internal successors, (1952), 784 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:20,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1952 transitions. [2021-07-09 18:17:20,953 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1952 transitions. Word has length 26 [2021-07-09 18:17:20,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:20,954 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1952 transitions. [2021-07-09 18:17:20,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:20,954 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1952 transitions. [2021-07-09 18:17:20,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:20,955 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:20,955 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:21,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 18:17:21,171 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:21,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:21,172 INFO L82 PathProgramCache]: Analyzing trace with hash 15104427, now seen corresponding path program 29 times [2021-07-09 18:17:21,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:21,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297609265] [2021-07-09 18:17:21,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:21,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:21,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:21,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:21,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297609265] [2021-07-09 18:17:21,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297609265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:21,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008829303] [2021-07-09 18:17:21,441 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:21,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:17:21,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:21,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:17:21,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:21,637 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:21,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:21,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:21,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:21,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-09 18:17:21,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:21,649 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:21,649 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-09 18:17:21,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:21,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008829303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:21,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:21,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-09 18:17:21,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752802712] [2021-07-09 18:17:21,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:21,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:21,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:21,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:21,671 INFO L87 Difference]: Start difference. First operand 785 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:23,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:23,045 INFO L93 Difference]: Finished difference Result 1322 states and 3150 transitions. [2021-07-09 18:17:23,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:17:23,045 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:23,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:23,049 INFO L225 Difference]: With dead ends: 1322 [2021-07-09 18:17:23,049 INFO L226 Difference]: Without dead ends: 1313 [2021-07-09 18:17:23,049 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1342.8ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:17:23,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-07-09 18:17:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 825. [2021-07-09 18:17:23,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.491504854368932) internal successors, (2053), 824 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2053 transitions. [2021-07-09 18:17:23,078 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2053 transitions. Word has length 26 [2021-07-09 18:17:23,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:23,078 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2053 transitions. [2021-07-09 18:17:23,079 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2053 transitions. [2021-07-09 18:17:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:23,080 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:23,080 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:23,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:23,296 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:23,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:23,297 INFO L82 PathProgramCache]: Analyzing trace with hash 889695859, now seen corresponding path program 30 times [2021-07-09 18:17:23,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:23,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831929975] [2021-07-09 18:17:23,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:23,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:23,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:23,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831929975] [2021-07-09 18:17:23,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831929975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:23,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545942858] [2021-07-09 18:17:23,498 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:23,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:23,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:23,557 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 18:17:23,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:23,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:23,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:23,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:23,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:23,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:23,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:23,852 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:23,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 7 [2021-07-09 18:17:23,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:23,867 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.5 percent of original size [2021-07-09 18:17:23,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:23,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:7 [2021-07-09 18:17:23,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:23,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545942858] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:23,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:23,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:17:23,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782109271] [2021-07-09 18:17:23,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:17:23,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:23,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:17:23,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:17:23,885 INFO L87 Difference]: Start difference. First operand 825 states and 2053 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:24,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:24,686 INFO L93 Difference]: Finished difference Result 1058 states and 2506 transitions. [2021-07-09 18:17:24,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 18:17:24,687 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:24,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:24,690 INFO L225 Difference]: With dead ends: 1058 [2021-07-09 18:17:24,690 INFO L226 Difference]: Without dead ends: 1026 [2021-07-09 18:17:24,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 838.4ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:17:24,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-07-09 18:17:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 871. [2021-07-09 18:17:24,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 2.5068965517241377) internal successors, (2181), 870 states have internal predecessors, (2181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:24,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2181 transitions. [2021-07-09 18:17:24,704 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2181 transitions. Word has length 26 [2021-07-09 18:17:24,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:24,704 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2181 transitions. [2021-07-09 18:17:24,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:24,704 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2181 transitions. [2021-07-09 18:17:24,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:24,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:24,705 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:24,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:24,913 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:24,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2122713361, now seen corresponding path program 31 times [2021-07-09 18:17:24,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:24,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965552498] [2021-07-09 18:17:24,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:25,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:25,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965552498] [2021-07-09 18:17:25,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965552498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:25,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736557582] [2021-07-09 18:17:25,137 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 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 [2021-07-09 18:17:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:25,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:17:25,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:25,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:25,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:25,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:25,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:25,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:25,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-09 18:17:25,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:25,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:25,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:25,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-09 18:17:25,374 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:25,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736557582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:25,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:25,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 18:17:25,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643815162] [2021-07-09 18:17:25,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:25,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:25,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:25,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:25,375 INFO L87 Difference]: Start difference. First operand 871 states and 2181 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:26,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:26,219 INFO L93 Difference]: Finished difference Result 1083 states and 2599 transitions. [2021-07-09 18:17:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:17:26,220 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:26,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:26,223 INFO L225 Difference]: With dead ends: 1083 [2021-07-09 18:17:26,223 INFO L226 Difference]: Without dead ends: 1052 [2021-07-09 18:17:26,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 832.2ms TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 18:17:26,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-07-09 18:17:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 900. [2021-07-09 18:17:26,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 2.50055617352614) internal successors, (2248), 899 states have internal predecessors, (2248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2248 transitions. [2021-07-09 18:17:26,237 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2248 transitions. Word has length 26 [2021-07-09 18:17:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:26,237 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2248 transitions. [2021-07-09 18:17:26,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2248 transitions. [2021-07-09 18:17:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:26,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:26,238 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:26,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-09 18:17:26,453 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:26,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:26,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1180327377, now seen corresponding path program 32 times [2021-07-09 18:17:26,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:26,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922791822] [2021-07-09 18:17:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:26,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:26,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:26,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922791822] [2021-07-09 18:17:26,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922791822] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:26,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019360634] [2021-07-09 18:17:26,713 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:26,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:26,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:26,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:17:26,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:26,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:26,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:26,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:26,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:26,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:26,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:26,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:26,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-09 18:17:26,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:26,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:26,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:26,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-09 18:17:26,929 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:26,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019360634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:26,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:26,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 18:17:26,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913283870] [2021-07-09 18:17:26,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:26,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:26,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:26,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:26,930 INFO L87 Difference]: Start difference. First operand 900 states and 2248 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:28,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:28,095 INFO L93 Difference]: Finished difference Result 1238 states and 2925 transitions. [2021-07-09 18:17:28,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:17:28,096 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:28,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:28,100 INFO L225 Difference]: With dead ends: 1238 [2021-07-09 18:17:28,100 INFO L226 Difference]: Without dead ends: 1186 [2021-07-09 18:17:28,100 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1144.6ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 18:17:28,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-07-09 18:17:28,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 957. [2021-07-09 18:17:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.5) internal successors, (2390), 956 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2390 transitions. [2021-07-09 18:17:28,114 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2390 transitions. Word has length 26 [2021-07-09 18:17:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:28,114 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 2390 transitions. [2021-07-09 18:17:28,114 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:28,114 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2390 transitions. [2021-07-09 18:17:28,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:28,116 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:28,116 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:28,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:28,322 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:28,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:28,322 INFO L82 PathProgramCache]: Analyzing trace with hash -514620625, now seen corresponding path program 33 times [2021-07-09 18:17:28,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:28,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278373930] [2021-07-09 18:17:28,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:28,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:28,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:28,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:28,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278373930] [2021-07-09 18:17:28,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278373930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:28,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231672159] [2021-07-09 18:17:28,516 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:28,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:17:28,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:28,544 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2021-07-09 18:17:28,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:28,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:28,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:28,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:28,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:28,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:28,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:28,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:28,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:28,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:28,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 47 [2021-07-09 18:17:28,855 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:17:28,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:28,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:17:28,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:27 [2021-07-09 18:17:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:28,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231672159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:28,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:28,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-07-09 18:17:28,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725925315] [2021-07-09 18:17:28,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:17:28,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:28,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:17:28,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:17:28,959 INFO L87 Difference]: Start difference. First operand 957 states and 2390 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:30,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:30,649 INFO L93 Difference]: Finished difference Result 1077 states and 2608 transitions. [2021-07-09 18:17:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:17:30,650 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:30,652 INFO L225 Difference]: With dead ends: 1077 [2021-07-09 18:17:30,652 INFO L226 Difference]: Without dead ends: 1042 [2021-07-09 18:17:30,653 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1544.6ms TimeCoverageRelationStatistics Valid=309, Invalid=2343, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:17:30,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-07-09 18:17:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 964. [2021-07-09 18:17:30,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 964 states, 963 states have (on average 2.4942886812045693) internal successors, (2402), 963 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:30,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2402 transitions. [2021-07-09 18:17:30,665 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2402 transitions. Word has length 26 [2021-07-09 18:17:30,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:30,665 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 2402 transitions. [2021-07-09 18:17:30,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 22 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:30,665 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2402 transitions. [2021-07-09 18:17:30,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:30,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:30,667 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:30,881 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-07-09 18:17:30,881 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:30,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:30,881 INFO L82 PathProgramCache]: Analyzing trace with hash 102747963, now seen corresponding path program 34 times [2021-07-09 18:17:30,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:30,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481083127] [2021-07-09 18:17:30,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:31,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:31,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481083127] [2021-07-09 18:17:31,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481083127] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:31,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621390770] [2021-07-09 18:17:31,120 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:31,147 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:31,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:31,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:17:31,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:31,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:31,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:31,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:31,373 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:31,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:31,374 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:31,375 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:31,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-09 18:17:31,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:31,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:31,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:31,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-09 18:17:31,398 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:31,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621390770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:31,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:31,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-07-09 18:17:31,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369779544] [2021-07-09 18:17:31,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:31,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:31,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:31,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:31,410 INFO L87 Difference]: Start difference. First operand 964 states and 2402 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:32,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:32,407 INFO L93 Difference]: Finished difference Result 1320 states and 3177 transitions. [2021-07-09 18:17:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 18:17:32,407 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:32,411 INFO L225 Difference]: With dead ends: 1320 [2021-07-09 18:17:32,412 INFO L226 Difference]: Without dead ends: 1283 [2021-07-09 18:17:32,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 982.7ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:17:32,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-07-09 18:17:32,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 995. [2021-07-09 18:17:32,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.4989939637826963) internal successors, (2484), 994 states have internal predecessors, (2484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:32,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2484 transitions. [2021-07-09 18:17:32,426 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2484 transitions. Word has length 26 [2021-07-09 18:17:32,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:32,426 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2484 transitions. [2021-07-09 18:17:32,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2484 transitions. [2021-07-09 18:17:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:32,428 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:32,428 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:32,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:32,644 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:32,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:32,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1163999753, now seen corresponding path program 35 times [2021-07-09 18:17:32,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:32,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816652468] [2021-07-09 18:17:32,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:32,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:32,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:32,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816652468] [2021-07-09 18:17:32,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816652468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:32,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085828694] [2021-07-09 18:17:32,855 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:32,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:32,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:17:32,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:33,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:33,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:33,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:33,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:33,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:33,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:33,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-09 18:17:33,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:33,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:33,069 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:33,069 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-09 18:17:33,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:33,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085828694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:33,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:33,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 18:17:33,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074095359] [2021-07-09 18:17:33,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:33,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:33,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:33,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:33,086 INFO L87 Difference]: Start difference. First operand 995 states and 2484 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:33,930 INFO L93 Difference]: Finished difference Result 1297 states and 3058 transitions. [2021-07-09 18:17:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 18:17:33,931 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:33,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:33,933 INFO L225 Difference]: With dead ends: 1297 [2021-07-09 18:17:33,933 INFO L226 Difference]: Without dead ends: 1263 [2021-07-09 18:17:33,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 738.9ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 18:17:33,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-07-09 18:17:33,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1043. [2021-07-09 18:17:33,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 1042 states have (on average 2.513435700575816) internal successors, (2619), 1042 states have internal predecessors, (2619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 2619 transitions. [2021-07-09 18:17:33,948 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 2619 transitions. Word has length 26 [2021-07-09 18:17:33,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:33,948 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 2619 transitions. [2021-07-09 18:17:33,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:33,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 2619 transitions. [2021-07-09 18:17:33,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:33,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:33,951 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:34,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-07-09 18:17:34,168 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:34,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:34,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1726651059, now seen corresponding path program 36 times [2021-07-09 18:17:34,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:34,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031818945] [2021-07-09 18:17:34,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:34,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:34,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:34,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031818945] [2021-07-09 18:17:34,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031818945] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:34,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431772874] [2021-07-09 18:17:34,348 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:34,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 18:17:34,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:34,372 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 18:17:34,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:34,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:34,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:34,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:34,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:34,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-07-09 18:17:34,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:17:34,689 INFO L628 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2021-07-09 18:17:34,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:34,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:50 [2021-07-09 18:17:34,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:34,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431772874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:34,801 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:34,801 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-07-09 18:17:34,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508387138] [2021-07-09 18:17:34,802 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:17:34,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:34,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:17:34,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:17:34,802 INFO L87 Difference]: Start difference. First operand 1043 states and 2619 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:36,647 INFO L93 Difference]: Finished difference Result 1498 states and 3593 transitions. [2021-07-09 18:17:36,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:17:36,647 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:36,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:36,653 INFO L225 Difference]: With dead ends: 1498 [2021-07-09 18:17:36,653 INFO L226 Difference]: Without dead ends: 1436 [2021-07-09 18:17:36,654 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1753.3ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:17:36,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-07-09 18:17:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1086. [2021-07-09 18:17:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1086 states, 1085 states have (on average 2.511520737327189) internal successors, (2725), 1085 states have internal predecessors, (2725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2725 transitions. [2021-07-09 18:17:36,669 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2725 transitions. Word has length 26 [2021-07-09 18:17:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:36,669 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 2725 transitions. [2021-07-09 18:17:36,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2725 transitions. [2021-07-09 18:17:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:36,670 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:36,670 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:36,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 18:17:36,886 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:36,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:36,887 INFO L82 PathProgramCache]: Analyzing trace with hash 609282159, now seen corresponding path program 37 times [2021-07-09 18:17:36,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:36,887 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532778399] [2021-07-09 18:17:36,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:37,094 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:37,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:37,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532778399] [2021-07-09 18:17:37,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532778399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:37,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656812186] [2021-07-09 18:17:37,095 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:37,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:37,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:17:37,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:37,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:37,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:37,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:37,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:37,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:37,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-09 18:17:37,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:37,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:37,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:37,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-09 18:17:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:37,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656812186] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:37,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:37,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 18:17:37,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132428919] [2021-07-09 18:17:37,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:37,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:37,308 INFO L87 Difference]: Start difference. First operand 1086 states and 2725 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:38,393 INFO L93 Difference]: Finished difference Result 1318 states and 3210 transitions. [2021-07-09 18:17:38,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:17:38,394 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:38,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:38,396 INFO L225 Difference]: With dead ends: 1318 [2021-07-09 18:17:38,396 INFO L226 Difference]: Without dead ends: 1276 [2021-07-09 18:17:38,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1064.8ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:17:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-07-09 18:17:38,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1112. [2021-07-09 18:17:38,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.5013501350135012) internal successors, (2779), 1111 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 2779 transitions. [2021-07-09 18:17:38,410 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 2779 transitions. Word has length 26 [2021-07-09 18:17:38,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:38,410 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 2779 transitions. [2021-07-09 18:17:38,410 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:38,410 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 2779 transitions. [2021-07-09 18:17:38,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 18:17:38,411 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:38,411 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:38,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:38,627 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:38,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:38,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712627, now seen corresponding path program 38 times [2021-07-09 18:17:38,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:38,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920062167] [2021-07-09 18:17:38,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:38,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:38,850 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:38,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920062167] [2021-07-09 18:17:38,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920062167] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:38,850 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058504688] [2021-07-09 18:17:38,850 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:38,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:38,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:38,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 18:17:38,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:39,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,036 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,036 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:39,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:17:39,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:39,039 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:17:39,039 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-07-09 18:17:39,040 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,045 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:17:39,046 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:17:39,046 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-07-09 18:17:39,067 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:39,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058504688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:39,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:39,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-07-09 18:17:39,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693072249] [2021-07-09 18:17:39,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:39,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:39,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:39,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:39,068 INFO L87 Difference]: Start difference. First operand 1112 states and 2779 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:40,152 INFO L93 Difference]: Finished difference Result 1252 states and 3057 transitions. [2021-07-09 18:17:40,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:17:40,153 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 18:17:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:40,155 INFO L225 Difference]: With dead ends: 1252 [2021-07-09 18:17:40,155 INFO L226 Difference]: Without dead ends: 1245 [2021-07-09 18:17:40,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1099.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:17:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-07-09 18:17:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1121. [2021-07-09 18:17:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.500892857142857) internal successors, (2801), 1120 states have internal predecessors, (2801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:40,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 2801 transitions. [2021-07-09 18:17:40,169 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 2801 transitions. Word has length 26 [2021-07-09 18:17:40,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:40,170 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 2801 transitions. [2021-07-09 18:17:40,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:40,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 2801 transitions. [2021-07-09 18:17:40,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:40,172 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:40,172 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:40,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:40,385 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:40,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:40,385 INFO L82 PathProgramCache]: Analyzing trace with hash -197112851, now seen corresponding path program 39 times [2021-07-09 18:17:40,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:40,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863616422] [2021-07-09 18:17:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:40,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:40,492 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:40,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:40,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863616422] [2021-07-09 18:17:40,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863616422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:40,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343269355] [2021-07-09 18:17:40,492 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:40,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:17:40,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:40,654 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:40,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343269355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:40,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:40,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-07-09 18:17:40,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514270386] [2021-07-09 18:17:40,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:17:40,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:40,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:17:40,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:17:40,656 INFO L87 Difference]: Start difference. First operand 1121 states and 2801 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:41,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:41,420 INFO L93 Difference]: Finished difference Result 1649 states and 3850 transitions. [2021-07-09 18:17:41,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:17:41,420 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 28 [2021-07-09 18:17:41,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:41,423 INFO L225 Difference]: With dead ends: 1649 [2021-07-09 18:17:41,423 INFO L226 Difference]: Without dead ends: 1649 [2021-07-09 18:17:41,424 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 697.8ms TimeCoverageRelationStatistics Valid=772, Invalid=2090, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:17:41,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-07-09 18:17:41,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1078. [2021-07-09 18:17:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1078 states, 1077 states have (on average 2.503249767873723) internal successors, (2696), 1077 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2696 transitions. [2021-07-09 18:17:41,438 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2696 transitions. Word has length 28 [2021-07-09 18:17:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:41,438 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 2696 transitions. [2021-07-09 18:17:41,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:41,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2696 transitions. [2021-07-09 18:17:41,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:41,439 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:41,439 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:41,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:41,655 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:41,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1535197913, now seen corresponding path program 40 times [2021-07-09 18:17:41,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:41,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846401031] [2021-07-09 18:17:41,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:41,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:41,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:41,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846401031] [2021-07-09 18:17:41,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846401031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:41,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102574267] [2021-07-09 18:17:41,711 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:41,733 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:41,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:41,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:41,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:41,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:41,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102574267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:41,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:41,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:17:41,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52651577] [2021-07-09 18:17:41,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:41,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:41,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:41,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:41,869 INFO L87 Difference]: Start difference. First operand 1078 states and 2696 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:42,884 INFO L93 Difference]: Finished difference Result 2079 states and 4782 transitions. [2021-07-09 18:17:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:17:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:42,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:42,887 INFO L225 Difference]: With dead ends: 2079 [2021-07-09 18:17:42,887 INFO L226 Difference]: Without dead ends: 2008 [2021-07-09 18:17:42,888 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 934.6ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:17:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-07-09 18:17:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1257. [2021-07-09 18:17:42,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1257 states, 1256 states have (on average 2.519904458598726) internal successors, (3165), 1256 states have internal predecessors, (3165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:42,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3165 transitions. [2021-07-09 18:17:42,908 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3165 transitions. Word has length 28 [2021-07-09 18:17:42,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:42,908 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3165 transitions. [2021-07-09 18:17:42,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3165 transitions. [2021-07-09 18:17:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:42,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:42,910 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:43,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-07-09 18:17:43,126 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:43,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1640834073, now seen corresponding path program 41 times [2021-07-09 18:17:43,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:43,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616136916] [2021-07-09 18:17:43,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:43,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:43,167 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:43,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:43,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616136916] [2021-07-09 18:17:43,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616136916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:43,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383427995] [2021-07-09 18:17:43,168 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:43,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:17:43,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:43,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:43,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:43,318 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:43,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383427995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:43,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:43,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-09 18:17:43,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405535122] [2021-07-09 18:17:43,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:17:43,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:43,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:17:43,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:43,319 INFO L87 Difference]: Start difference. First operand 1257 states and 3165 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:44,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:44,147 INFO L93 Difference]: Finished difference Result 2322 states and 5582 transitions. [2021-07-09 18:17:44,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:17:44,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:44,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:44,151 INFO L225 Difference]: With dead ends: 2322 [2021-07-09 18:17:44,151 INFO L226 Difference]: Without dead ends: 2316 [2021-07-09 18:17:44,152 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 732.7ms TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:17:44,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-07-09 18:17:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1546. [2021-07-09 18:17:44,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 2.5372168284789645) internal successors, (3920), 1545 states have internal predecessors, (3920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:44,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3920 transitions. [2021-07-09 18:17:44,175 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3920 transitions. Word has length 28 [2021-07-09 18:17:44,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:44,176 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 3920 transitions. [2021-07-09 18:17:44,176 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:44,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3920 transitions. [2021-07-09 18:17:44,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:44,177 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:44,177 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:44,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:44,393 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:44,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:44,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1972512861, now seen corresponding path program 42 times [2021-07-09 18:17:44,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:44,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155727344] [2021-07-09 18:17:44,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:44,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:44,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155727344] [2021-07-09 18:17:44,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155727344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:44,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542525377] [2021-07-09 18:17:44,433 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:44,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:17:44,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:44,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:44,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:44,585 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:44,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542525377] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:44,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:44,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-09 18:17:44,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390935539] [2021-07-09 18:17:44,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:17:44,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:44,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:17:44,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:44,586 INFO L87 Difference]: Start difference. First operand 1546 states and 3920 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:45,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:45,275 INFO L93 Difference]: Finished difference Result 1833 states and 4458 transitions. [2021-07-09 18:17:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:17:45,275 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:45,278 INFO L225 Difference]: With dead ends: 1833 [2021-07-09 18:17:45,278 INFO L226 Difference]: Without dead ends: 1829 [2021-07-09 18:17:45,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 627.5ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:17:45,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-07-09 18:17:45,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1518. [2021-07-09 18:17:45,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 2.5392221489782467) internal successors, (3852), 1517 states have internal predecessors, (3852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:45,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 3852 transitions. [2021-07-09 18:17:45,295 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 3852 transitions. Word has length 28 [2021-07-09 18:17:45,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:45,295 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 3852 transitions. [2021-07-09 18:17:45,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:45,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 3852 transitions. [2021-07-09 18:17:45,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:45,297 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:45,297 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:45,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:45,513 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:45,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:45,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1204854355, now seen corresponding path program 43 times [2021-07-09 18:17:45,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:45,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579994000] [2021-07-09 18:17:45,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:45,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:45,554 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:45,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579994000] [2021-07-09 18:17:45,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579994000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:45,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625652165] [2021-07-09 18:17:45,554 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:45,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:45,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:45,707 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:45,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625652165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:45,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:45,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-09 18:17:45,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928070074] [2021-07-09 18:17:45,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:17:45,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:45,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:17:45,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:45,708 INFO L87 Difference]: Start difference. First operand 1518 states and 3852 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) [2021-07-09 18:17:46,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:46,261 INFO L93 Difference]: Finished difference Result 2126 states and 5176 transitions. [2021-07-09 18:17:46,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 18:17:46,261 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 28 [2021-07-09 18:17:46,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:46,264 INFO L225 Difference]: With dead ends: 2126 [2021-07-09 18:17:46,264 INFO L226 Difference]: Without dead ends: 2117 [2021-07-09 18:17:46,265 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 447.6ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 18:17:46,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-07-09 18:17:46,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1623. [2021-07-09 18:17:46,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1623 states, 1622 states have (on average 2.553020961775586) internal successors, (4141), 1622 states have internal predecessors, (4141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 4141 transitions. [2021-07-09 18:17:46,287 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 4141 transitions. Word has length 28 [2021-07-09 18:17:46,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:46,287 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 4141 transitions. [2021-07-09 18:17:46,287 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) [2021-07-09 18:17:46,287 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 4141 transitions. [2021-07-09 18:17:46,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:46,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:46,289 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:46,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-09 18:17:46,505 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:46,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:46,505 INFO L82 PathProgramCache]: Analyzing trace with hash -760321333, now seen corresponding path program 44 times [2021-07-09 18:17:46,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:46,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781510073] [2021-07-09 18:17:46,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:46,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:46,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:46,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781510073] [2021-07-09 18:17:46,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781510073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:46,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136405549] [2021-07-09 18:17:46,552 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:46,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:46,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:46,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:46,705 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:46,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136405549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:46,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:46,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-07-09 18:17:46,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051302680] [2021-07-09 18:17:46,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:46,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:46,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:46,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:46,706 INFO L87 Difference]: Start difference. First operand 1623 states and 4141 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:47,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:47,417 INFO L93 Difference]: Finished difference Result 2217 states and 5362 transitions. [2021-07-09 18:17:47,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:17:47,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:47,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:47,420 INFO L225 Difference]: With dead ends: 2217 [2021-07-09 18:17:47,420 INFO L226 Difference]: Without dead ends: 2207 [2021-07-09 18:17:47,420 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 640.1ms TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:17:47,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-07-09 18:17:47,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1676. [2021-07-09 18:17:47,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 2.5635820895522388) internal successors, (4294), 1675 states have internal predecessors, (4294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 4294 transitions. [2021-07-09 18:17:47,441 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 4294 transitions. Word has length 28 [2021-07-09 18:17:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:47,441 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 4294 transitions. [2021-07-09 18:17:47,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 4294 transitions. [2021-07-09 18:17:47,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:47,443 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:47,443 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:47,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-07-09 18:17:47,659 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:47,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:47,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1047790539, now seen corresponding path program 45 times [2021-07-09 18:17:47,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:47,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425470923] [2021-07-09 18:17:47,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:47,711 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:47,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:47,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425470923] [2021-07-09 18:17:47,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425470923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:47,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134223853] [2021-07-09 18:17:47,711 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:47,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:17:47,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:47,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:47,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:47,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134223853] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:47,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:47,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:17:47,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072397328] [2021-07-09 18:17:47,870 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:47,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:47,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:47,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:47,871 INFO L87 Difference]: Start difference. First operand 1676 states and 4294 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:48,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:48,590 INFO L93 Difference]: Finished difference Result 2439 states and 5889 transitions. [2021-07-09 18:17:48,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:17:48,590 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:48,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:48,593 INFO L225 Difference]: With dead ends: 2439 [2021-07-09 18:17:48,593 INFO L226 Difference]: Without dead ends: 2417 [2021-07-09 18:17:48,593 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=724, Invalid=2246, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:17:48,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-07-09 18:17:48,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1598. [2021-07-09 18:17:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1598 states, 1597 states have (on average 2.5510331872260488) internal successors, (4074), 1597 states have internal predecessors, (4074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:48,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 4074 transitions. [2021-07-09 18:17:48,618 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 4074 transitions. Word has length 28 [2021-07-09 18:17:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:48,618 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 4074 transitions. [2021-07-09 18:17:48,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:48,618 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 4074 transitions. [2021-07-09 18:17:48,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:48,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:48,620 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:48,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 18:17:48,836 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:48,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:48,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2093633671, now seen corresponding path program 46 times [2021-07-09 18:17:48,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:48,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285351806] [2021-07-09 18:17:48,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:48,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:48,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:48,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:48,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285351806] [2021-07-09 18:17:48,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285351806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:48,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238407836] [2021-07-09 18:17:48,896 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:48,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:48,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:48,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:48,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:49,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:49,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238407836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:49,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:49,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:17:49,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057536032] [2021-07-09 18:17:49,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:49,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:49,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:49,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:49,057 INFO L87 Difference]: Start difference. First operand 1598 states and 4074 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:49,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:49,835 INFO L93 Difference]: Finished difference Result 2405 states and 5659 transitions. [2021-07-09 18:17:49,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 18:17:49,835 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:49,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:49,838 INFO L225 Difference]: With dead ends: 2405 [2021-07-09 18:17:49,838 INFO L226 Difference]: Without dead ends: 2405 [2021-07-09 18:17:49,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 682.1ms TimeCoverageRelationStatistics Valid=765, Invalid=2097, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:17:49,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-07-09 18:17:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1388. [2021-07-09 18:17:49,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1388 states, 1387 states have (on average 2.5097332372025956) internal successors, (3481), 1387 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:49,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3481 transitions. [2021-07-09 18:17:49,858 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3481 transitions. Word has length 28 [2021-07-09 18:17:49,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:49,858 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3481 transitions. [2021-07-09 18:17:49,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:49,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3481 transitions. [2021-07-09 18:17:49,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:49,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:49,859 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:50,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:50,076 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:50,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:50,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1416205117, now seen corresponding path program 47 times [2021-07-09 18:17:50,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:50,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232532091] [2021-07-09 18:17:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:50,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:50,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:50,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232532091] [2021-07-09 18:17:50,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232532091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:50,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526191430] [2021-07-09 18:17:50,125 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:50,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 18:17:50,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:50,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:50,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:50,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526191430] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:50,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:50,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:17:50,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145247019] [2021-07-09 18:17:50,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:50,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:50,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:50,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:50,282 INFO L87 Difference]: Start difference. First operand 1388 states and 3481 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:51,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:51,000 INFO L93 Difference]: Finished difference Result 1806 states and 4238 transitions. [2021-07-09 18:17:51,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:17:51,001 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:51,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:51,003 INFO L225 Difference]: With dead ends: 1806 [2021-07-09 18:17:51,003 INFO L226 Difference]: Without dead ends: 1767 [2021-07-09 18:17:51,003 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 634.6ms TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:17:51,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-07-09 18:17:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1334. [2021-07-09 18:17:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1334 states, 1333 states have (on average 2.495873968492123) internal successors, (3327), 1333 states have internal predecessors, (3327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 3327 transitions. [2021-07-09 18:17:51,020 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 3327 transitions. Word has length 28 [2021-07-09 18:17:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:51,021 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 3327 transitions. [2021-07-09 18:17:51,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 3327 transitions. [2021-07-09 18:17:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:51,022 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:51,022 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:51,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:51,228 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1362767239, now seen corresponding path program 48 times [2021-07-09 18:17:51,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:51,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624424227] [2021-07-09 18:17:51,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:51,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:51,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:51,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624424227] [2021-07-09 18:17:51,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624424227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:51,298 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125910185] [2021-07-09 18:17:51,298 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:51,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:51,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:51,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:51,453 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:51,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1125910185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:51,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:51,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:17:51,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310904690] [2021-07-09 18:17:51,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:51,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:51,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:51,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:51,454 INFO L87 Difference]: Start difference. First operand 1334 states and 3327 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:52,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:52,288 INFO L93 Difference]: Finished difference Result 2351 states and 5515 transitions. [2021-07-09 18:17:52,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:17:52,288 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 28 [2021-07-09 18:17:52,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:52,291 INFO L225 Difference]: With dead ends: 2351 [2021-07-09 18:17:52,291 INFO L226 Difference]: Without dead ends: 2351 [2021-07-09 18:17:52,291 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 730.6ms TimeCoverageRelationStatistics Valid=892, Invalid=2300, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:17:52,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-07-09 18:17:52,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1439. [2021-07-09 18:17:52,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1438 states have (on average 2.4714881780250346) internal successors, (3554), 1438 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3554 transitions. [2021-07-09 18:17:52,314 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3554 transitions. Word has length 28 [2021-07-09 18:17:52,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:52,314 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 3554 transitions. [2021-07-09 18:17:52,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:52,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3554 transitions. [2021-07-09 18:17:52,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:52,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:52,316 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:52,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:52,532 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:52,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:52,533 INFO L82 PathProgramCache]: Analyzing trace with hash -452605191, now seen corresponding path program 49 times [2021-07-09 18:17:52,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:52,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969820408] [2021-07-09 18:17:52,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:52,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:52,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969820408] [2021-07-09 18:17:52,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969820408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:52,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921999260] [2021-07-09 18:17:52,576 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:52,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:52,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:52,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:52,727 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:52,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921999260] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:52,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:52,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-07-09 18:17:52,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487199537] [2021-07-09 18:17:52,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:52,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:52,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:52,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:52,728 INFO L87 Difference]: Start difference. First operand 1439 states and 3554 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:53,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:53,352 INFO L93 Difference]: Finished difference Result 1783 states and 4197 transitions. [2021-07-09 18:17:53,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:17:53,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:53,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:53,354 INFO L225 Difference]: With dead ends: 1783 [2021-07-09 18:17:53,354 INFO L226 Difference]: Without dead ends: 1765 [2021-07-09 18:17:53,355 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 559.0ms TimeCoverageRelationStatistics Valid=519, Invalid=1737, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:17:53,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-07-09 18:17:53,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1470. [2021-07-09 18:17:53,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.4751531654186523) internal successors, (3636), 1469 states have internal predecessors, (3636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:53,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 3636 transitions. [2021-07-09 18:17:53,374 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 3636 transitions. Word has length 28 [2021-07-09 18:17:53,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:53,374 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 3636 transitions. [2021-07-09 18:17:53,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:53,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 3636 transitions. [2021-07-09 18:17:53,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:53,376 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:53,376 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:53,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:53,592 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:53,592 INFO L82 PathProgramCache]: Analyzing trace with hash 983607605, now seen corresponding path program 50 times [2021-07-09 18:17:53,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:53,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753892269] [2021-07-09 18:17:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:53,638 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:53,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753892269] [2021-07-09 18:17:53,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753892269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:53,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205063601] [2021-07-09 18:17:53,638 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:53,662 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:17:53,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:53,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:53,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:53,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:53,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205063601] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:53,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:53,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-07-09 18:17:53,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244123928] [2021-07-09 18:17:53,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:53,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:53,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:53,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:53,796 INFO L87 Difference]: Start difference. First operand 1470 states and 3636 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:54,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:54,730 INFO L93 Difference]: Finished difference Result 2870 states and 6981 transitions. [2021-07-09 18:17:54,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:17:54,730 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 28 [2021-07-09 18:17:54,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:54,733 INFO L225 Difference]: With dead ends: 2870 [2021-07-09 18:17:54,734 INFO L226 Difference]: Without dead ends: 2870 [2021-07-09 18:17:54,734 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 793.7ms TimeCoverageRelationStatistics Valid=1080, Invalid=2580, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:17:54,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-07-09 18:17:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2266. [2021-07-09 18:17:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2266 states, 2265 states have (on average 2.5527593818984546) internal successors, (5782), 2265 states have internal predecessors, (5782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:54,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 5782 transitions. [2021-07-09 18:17:54,765 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 5782 transitions. Word has length 28 [2021-07-09 18:17:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:54,765 INFO L482 AbstractCegarLoop]: Abstraction has 2266 states and 5782 transitions. [2021-07-09 18:17:54,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 5782 transitions. [2021-07-09 18:17:54,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:54,768 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:54,768 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:54,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-07-09 18:17:54,984 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:54,984 INFO L82 PathProgramCache]: Analyzing trace with hash -768473619, now seen corresponding path program 51 times [2021-07-09 18:17:54,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:54,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489874966] [2021-07-09 18:17:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:55,022 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:55,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:55,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489874966] [2021-07-09 18:17:55,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489874966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:55,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792526998] [2021-07-09 18:17:55,023 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:55,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:17:55,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:55,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:55,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:55,193 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:55,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792526998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:55,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:55,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-07-09 18:17:55,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031270082] [2021-07-09 18:17:55,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 18:17:55,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:55,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 18:17:55,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-07-09 18:17:55,194 INFO L87 Difference]: Start difference. First operand 2266 states and 5782 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:55,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:55,798 INFO L93 Difference]: Finished difference Result 2793 states and 6806 transitions. [2021-07-09 18:17:55,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:17:55,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:55,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:55,802 INFO L225 Difference]: With dead ends: 2793 [2021-07-09 18:17:55,802 INFO L226 Difference]: Without dead ends: 2789 [2021-07-09 18:17:55,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 521.1ms TimeCoverageRelationStatistics Valid=634, Invalid=1622, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:17:55,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-07-09 18:17:55,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2240. [2021-07-09 18:17:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2240 states, 2239 states have (on average 2.5502456453774007) internal successors, (5710), 2239 states have internal predecessors, (5710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5710 transitions. [2021-07-09 18:17:55,836 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5710 transitions. Word has length 28 [2021-07-09 18:17:55,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:55,837 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5710 transitions. [2021-07-09 18:17:55,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:55,837 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5710 transitions. [2021-07-09 18:17:55,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:55,839 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:55,839 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:56,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:56,040 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:56,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:56,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1274819885, now seen corresponding path program 52 times [2021-07-09 18:17:56,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:56,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877963912] [2021-07-09 18:17:56,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:56,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:56,087 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:56,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877963912] [2021-07-09 18:17:56,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877963912] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:56,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297637145] [2021-07-09 18:17:56,087 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:56,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:17:56,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:56,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:56,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:56,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297637145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:56,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:56,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-07-09 18:17:56,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007022613] [2021-07-09 18:17:56,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 18:17:56,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:56,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 18:17:56,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-07-09 18:17:56,261 INFO L87 Difference]: Start difference. First operand 2240 states and 5710 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:56,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:56,852 INFO L93 Difference]: Finished difference Result 2987 states and 7280 transitions. [2021-07-09 18:17:56,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:17:56,852 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:56,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:56,855 INFO L225 Difference]: With dead ends: 2987 [2021-07-09 18:17:56,855 INFO L226 Difference]: Without dead ends: 2975 [2021-07-09 18:17:56,856 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 529.3ms TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:17:56,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-07-09 18:17:56,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2400. [2021-07-09 18:17:56,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2400 states, 2399 states have (on average 2.5652355147978323) internal successors, (6154), 2399 states have internal predecessors, (6154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6154 transitions. [2021-07-09 18:17:56,891 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6154 transitions. Word has length 28 [2021-07-09 18:17:56,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:56,891 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6154 transitions. [2021-07-09 18:17:56,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6154 transitions. [2021-07-09 18:17:56,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:56,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:56,893 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:57,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-09 18:17:57,109 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:57,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:57,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1502041265, now seen corresponding path program 53 times [2021-07-09 18:17:57,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:57,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455178852] [2021-07-09 18:17:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:57,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:17:57,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:57,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455178852] [2021-07-09 18:17:57,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455178852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:57,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666308788] [2021-07-09 18:17:57,159 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:57,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:17:57,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:57,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:57,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:57,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666308788] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:57,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:57,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-07-09 18:17:57,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257288227] [2021-07-09 18:17:57,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 18:17:57,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:57,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 18:17:57,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-07-09 18:17:57,342 INFO L87 Difference]: Start difference. First operand 2400 states and 6154 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:58,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:58,011 INFO L93 Difference]: Finished difference Result 3282 states and 8012 transitions. [2021-07-09 18:17:58,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:17:58,011 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-07-09 18:17:58,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:58,016 INFO L225 Difference]: With dead ends: 3282 [2021-07-09 18:17:58,016 INFO L226 Difference]: Without dead ends: 3262 [2021-07-09 18:17:58,016 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 582.5ms TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:17:58,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-07-09 18:17:58,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 2627. [2021-07-09 18:17:58,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2627 states, 2626 states have (on average 2.5788271134805787) internal successors, (6772), 2626 states have internal predecessors, (6772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:58,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 6772 transitions. [2021-07-09 18:17:58,056 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 6772 transitions. Word has length 28 [2021-07-09 18:17:58,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:58,056 INFO L482 AbstractCegarLoop]: Abstraction has 2627 states and 6772 transitions. [2021-07-09 18:17:58,056 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:58,056 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 6772 transitions. [2021-07-09 18:17:58,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-07-09 18:17:58,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:58,060 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:58,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-09 18:17:58,276 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:58,276 INFO L82 PathProgramCache]: Analyzing trace with hash -818455349, now seen corresponding path program 54 times [2021-07-09 18:17:58,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:58,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609300375] [2021-07-09 18:17:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:58,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:58,333 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:58,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:58,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609300375] [2021-07-09 18:17:58,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609300375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:58,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752970849] [2021-07-09 18:17:58,333 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:58,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:17:58,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:17:58,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 18:17:58,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:17:58,499 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:58,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752970849] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:58,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:17:58,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-07-09 18:17:58,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236668440] [2021-07-09 18:17:58,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:17:58,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:17:58,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:17:58,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:17:58,501 INFO L87 Difference]: Start difference. First operand 2627 states and 6772 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) [2021-07-09 18:17:59,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:17:59,185 INFO L93 Difference]: Finished difference Result 3390 states and 8366 transitions. [2021-07-09 18:17:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:17:59,185 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 28 [2021-07-09 18:17:59,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:17:59,190 INFO L225 Difference]: With dead ends: 3390 [2021-07-09 18:17:59,190 INFO L226 Difference]: Without dead ends: 3362 [2021-07-09 18:17:59,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 643.4ms TimeCoverageRelationStatistics Valid=778, Invalid=2414, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:17:59,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2021-07-09 18:17:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 2800. [2021-07-09 18:17:59,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2800 states, 2799 states have (on average 2.5862808145766345) internal successors, (7239), 2799 states have internal predecessors, (7239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:17:59,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 7239 transitions. [2021-07-09 18:17:59,230 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 7239 transitions. Word has length 28 [2021-07-09 18:17:59,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:17:59,230 INFO L482 AbstractCegarLoop]: Abstraction has 2800 states and 7239 transitions. [2021-07-09 18:17:59,230 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) [2021-07-09 18:17:59,230 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 7239 transitions. [2021-07-09 18:17:59,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:17:59,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:17:59,234 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:17:59,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:59,449 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:17:59,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:17:59,450 INFO L82 PathProgramCache]: Analyzing trace with hash -40043611, now seen corresponding path program 55 times [2021-07-09 18:17:59,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:17:59,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363893813] [2021-07-09 18:17:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:17:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:59,708 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:17:59,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:17:59,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363893813] [2021-07-09 18:17:59,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363893813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:17:59,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755519923] [2021-07-09 18:17:59,709 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:17:59,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:17:59,733 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:17:59,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:00,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:00,028 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:00,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:00,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:00,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:00,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:00,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:00,032 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:00,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:00,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:00,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:00,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:00,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:00,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:00,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755519923] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:00,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:00,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-09 18:18:00,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741039580] [2021-07-09 18:18:00,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:18:00,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:00,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:18:00,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:00,061 INFO L87 Difference]: Start difference. First operand 2800 states and 7239 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:01,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:01,814 INFO L93 Difference]: Finished difference Result 3814 states and 9580 transitions. [2021-07-09 18:18:01,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:18:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:01,819 INFO L225 Difference]: With dead ends: 3814 [2021-07-09 18:18:01,819 INFO L226 Difference]: Without dead ends: 3807 [2021-07-09 18:18:01,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1623.1ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:18:01,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-07-09 18:18:01,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2859. [2021-07-09 18:18:01,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.5878236529041287) internal successors, (7396), 2858 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) [2021-07-09 18:18:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 7396 transitions. [2021-07-09 18:18:01,853 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 7396 transitions. Word has length 30 [2021-07-09 18:18:01,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:01,853 INFO L482 AbstractCegarLoop]: Abstraction has 2859 states and 7396 transitions. [2021-07-09 18:18:01,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 7396 transitions. [2021-07-09 18:18:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:01,856 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:01,856 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:02,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-09 18:18:02,072 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:02,072 INFO L82 PathProgramCache]: Analyzing trace with hash -476580429, now seen corresponding path program 56 times [2021-07-09 18:18:02,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:02,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696813987] [2021-07-09 18:18:02,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:02,361 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:02,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:02,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696813987] [2021-07-09 18:18:02,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696813987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:02,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478915773] [2021-07-09 18:18:02,361 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 18:18:02,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:02,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:02,387 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:02,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:02,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:02,700 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:02,702 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:02,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:02,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:02,703 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:02,704 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:02,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:02,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:02,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:02,707 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:02,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:02,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:02,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:02,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:02,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:02,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478915773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:02,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:02,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-09 18:18:02,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49701285] [2021-07-09 18:18:02,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:18:02,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:02,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:18:02,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:02,734 INFO L87 Difference]: Start difference. First operand 2859 states and 7396 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:04,188 INFO L93 Difference]: Finished difference Result 3790 states and 9553 transitions. [2021-07-09 18:18:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:18:04,188 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:04,193 INFO L225 Difference]: With dead ends: 3790 [2021-07-09 18:18:04,194 INFO L226 Difference]: Without dead ends: 3739 [2021-07-09 18:18:04,194 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1403.4ms TimeCoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 18:18:04,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-07-09 18:18:04,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 2912. [2021-07-09 18:18:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2912 states, 2911 states have (on average 2.5774647887323945) internal successors, (7503), 2911 states have internal predecessors, (7503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 7503 transitions. [2021-07-09 18:18:04,254 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 7503 transitions. Word has length 30 [2021-07-09 18:18:04,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:04,254 INFO L482 AbstractCegarLoop]: Abstraction has 2912 states and 7503 transitions. [2021-07-09 18:18:04,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:04,255 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 7503 transitions. [2021-07-09 18:18:04,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:04,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:04,258 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:04,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:04,475 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:04,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:04,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1012771695, now seen corresponding path program 57 times [2021-07-09 18:18:04,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:04,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017902508] [2021-07-09 18:18:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:04,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:04,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:04,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017902508] [2021-07-09 18:18:04,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017902508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:04,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407936940] [2021-07-09 18:18:04,752 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:04,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:18:04,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:04,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:18:04,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:05,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:05,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:05,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:05,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:05,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:05,337 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:05,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:05,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2021-07-09 18:18:05,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-07-09 18:18:05,750 INFO L628 ElimStorePlain]: treesize reduction 286, result has 10.9 percent of original size [2021-07-09 18:18:05,756 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:18:05,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:22 [2021-07-09 18:18:05,813 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:05,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407936940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:05,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:05,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-07-09 18:18:05,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187264708] [2021-07-09 18:18:05,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:18:05,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:05,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:18:05,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:18:05,814 INFO L87 Difference]: Start difference. First operand 2912 states and 7503 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:07,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:07,661 INFO L93 Difference]: Finished difference Result 3918 states and 9829 transitions. [2021-07-09 18:18:07,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:18:07,661 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:07,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:07,666 INFO L225 Difference]: With dead ends: 3918 [2021-07-09 18:18:07,666 INFO L226 Difference]: Without dead ends: 3872 [2021-07-09 18:18:07,666 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1731.6ms TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:18:07,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2021-07-09 18:18:07,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 2956. [2021-07-09 18:18:07,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2956 states, 2955 states have (on average 2.572250423011844) internal successors, (7601), 2955 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:07,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7601 transitions. [2021-07-09 18:18:07,704 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7601 transitions. Word has length 30 [2021-07-09 18:18:07,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:07,704 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7601 transitions. [2021-07-09 18:18:07,704 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:07,704 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7601 transitions. [2021-07-09 18:18:07,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:07,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:07,708 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:07,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-07-09 18:18:07,921 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:07,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:07,921 INFO L82 PathProgramCache]: Analyzing trace with hash 290299947, now seen corresponding path program 58 times [2021-07-09 18:18:07,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:07,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [347628567] [2021-07-09 18:18:07,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:07,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:08,194 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:08,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:08,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [347628567] [2021-07-09 18:18:08,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [347628567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:08,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77140144] [2021-07-09 18:18:08,195 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:08,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:08,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:08,218 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:08,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:08,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:08,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:08,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:08,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:08,505 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:08,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:08,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:08,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:08,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:08,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:08,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:08,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:08,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:08,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:08,514 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:08,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:08,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77140144] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:08,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:08,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-09 18:18:08,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781784808] [2021-07-09 18:18:08,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:18:08,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:08,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:18:08,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:08,532 INFO L87 Difference]: Start difference. First operand 2956 states and 7601 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:09,950 INFO L93 Difference]: Finished difference Result 4132 states and 10315 transitions. [2021-07-09 18:18:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:18:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:09,956 INFO L225 Difference]: With dead ends: 4132 [2021-07-09 18:18:09,956 INFO L226 Difference]: Without dead ends: 4099 [2021-07-09 18:18:09,956 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1447.2ms TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:18:09,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-07-09 18:18:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3044. [2021-07-09 18:18:09,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3044 states, 3043 states have (on average 2.5626026947091685) internal successors, (7798), 3043 states have internal predecessors, (7798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 7798 transitions. [2021-07-09 18:18:09,995 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 7798 transitions. Word has length 30 [2021-07-09 18:18:09,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:09,995 INFO L482 AbstractCegarLoop]: Abstraction has 3044 states and 7798 transitions. [2021-07-09 18:18:09,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 7798 transitions. [2021-07-09 18:18:09,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:09,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:09,999 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:10,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:10,215 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:10,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:10,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1779723289, now seen corresponding path program 59 times [2021-07-09 18:18:10,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:10,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759756658] [2021-07-09 18:18:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:10,498 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:10,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:10,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759756658] [2021-07-09 18:18:10,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759756658] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:10,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795553546] [2021-07-09 18:18:10,499 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:10,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:18:10,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:10,524 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:10,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:10,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:10,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:10,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:10,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:10,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:10,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:10,776 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:10,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:10,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:10,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:10,778 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:10,778 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:10,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:10,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:10,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:10,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:10,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:10,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795553546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:10,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:10,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-09 18:18:10,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210131486] [2021-07-09 18:18:10,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:18:10,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:10,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:18:10,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:10,808 INFO L87 Difference]: Start difference. First operand 3044 states and 7798 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:12,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:12,741 INFO L93 Difference]: Finished difference Result 4375 states and 10858 transitions. [2021-07-09 18:18:12,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:18:12,742 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:12,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:12,747 INFO L225 Difference]: With dead ends: 4375 [2021-07-09 18:18:12,747 INFO L226 Difference]: Without dead ends: 4366 [2021-07-09 18:18:12,748 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1842.3ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:18:12,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-07-09 18:18:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3065. [2021-07-09 18:18:12,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3065 states, 3064 states have (on average 2.5682114882506526) internal successors, (7869), 3064 states have internal predecessors, (7869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7869 transitions. [2021-07-09 18:18:12,788 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7869 transitions. Word has length 30 [2021-07-09 18:18:12,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:12,788 INFO L482 AbstractCegarLoop]: Abstraction has 3065 states and 7869 transitions. [2021-07-09 18:18:12,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:12,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7869 transitions. [2021-07-09 18:18:12,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:12,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:12,791 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:13,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:13,008 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:13,008 INFO L82 PathProgramCache]: Analyzing trace with hash -110703891, now seen corresponding path program 60 times [2021-07-09 18:18:13,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:13,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025502210] [2021-07-09 18:18:13,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:13,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:13,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025502210] [2021-07-09 18:18:13,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025502210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:13,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283440693] [2021-07-09 18:18:13,224 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:13,249 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:18:13,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:13,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:13,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:13,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:13,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:13,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:13,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:13,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:13,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:13,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:13,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:13,563 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:13,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283440693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:13,563 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:13,563 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:18:13,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966594159] [2021-07-09 18:18:13,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:18:13,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:13,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:18:13,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:13,564 INFO L87 Difference]: Start difference. First operand 3065 states and 7869 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:15,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:15,126 INFO L93 Difference]: Finished difference Result 4391 states and 10936 transitions. [2021-07-09 18:18:15,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 18:18:15,126 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:15,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:15,132 INFO L225 Difference]: With dead ends: 4391 [2021-07-09 18:18:15,132 INFO L226 Difference]: Without dead ends: 4352 [2021-07-09 18:18:15,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1457.0ms TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:18:15,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-07-09 18:18:15,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3212. [2021-07-09 18:18:15,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3212 states, 3211 states have (on average 2.5580815945188413) internal successors, (8214), 3211 states have internal predecessors, (8214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 8214 transitions. [2021-07-09 18:18:15,178 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 8214 transitions. Word has length 30 [2021-07-09 18:18:15,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:15,178 INFO L482 AbstractCegarLoop]: Abstraction has 3212 states and 8214 transitions. [2021-07-09 18:18:15,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:15,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 8214 transitions. [2021-07-09 18:18:15,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:15,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:15,182 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:15,399 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:15,399 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:15,399 INFO L82 PathProgramCache]: Analyzing trace with hash -416965491, now seen corresponding path program 61 times [2021-07-09 18:18:15,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:15,399 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584407010] [2021-07-09 18:18:15,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:15,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:15,627 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:15,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:15,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584407010] [2021-07-09 18:18:15,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584407010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:15,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019517364] [2021-07-09 18:18:15,628 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:15,652 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:15,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:15,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:15,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:15,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:15,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:15,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:15,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:15,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:15,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:15,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:15,907 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:15,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:15,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:15,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:15,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:15,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:15,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:15,935 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:15,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019517364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:15,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:15,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:18:15,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729297571] [2021-07-09 18:18:15,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:15,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:15,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:15,936 INFO L87 Difference]: Start difference. First operand 3212 states and 8214 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:17,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:17,483 INFO L93 Difference]: Finished difference Result 3557 states and 8936 transitions. [2021-07-09 18:18:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:18:17,483 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:17,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:17,487 INFO L225 Difference]: With dead ends: 3557 [2021-07-09 18:18:17,487 INFO L226 Difference]: Without dead ends: 3530 [2021-07-09 18:18:17,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1464.4ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:18:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2021-07-09 18:18:17,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3247. [2021-07-09 18:18:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3247 states, 3246 states have (on average 2.5523721503388788) internal successors, (8285), 3246 states have internal predecessors, (8285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:17,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 8285 transitions. [2021-07-09 18:18:17,527 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 8285 transitions. Word has length 30 [2021-07-09 18:18:17,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:17,528 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 8285 transitions. [2021-07-09 18:18:17,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 8285 transitions. [2021-07-09 18:18:17,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:17,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:17,534 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:17,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:17,741 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:17,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:17,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1763395665, now seen corresponding path program 62 times [2021-07-09 18:18:17,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:17,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322675368] [2021-07-09 18:18:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:17,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:17,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322675368] [2021-07-09 18:18:17,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322675368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:17,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79977648] [2021-07-09 18:18:17,968 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 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 [2021-07-09 18:18:17,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:17,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:17,993 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:17,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:18,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,280 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:18,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:18,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,284 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:18,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:18,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:18,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:18,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:18,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:18,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:18,294 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:18,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79977648] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:18,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:18,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:18:18,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837320123] [2021-07-09 18:18:18,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:18:18,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:18,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:18:18,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:18,313 INFO L87 Difference]: Start difference. First operand 3247 states and 8285 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:19,723 INFO L93 Difference]: Finished difference Result 4594 states and 11363 transitions. [2021-07-09 18:18:19,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:18:19,724 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:19,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:19,730 INFO L225 Difference]: With dead ends: 4594 [2021-07-09 18:18:19,730 INFO L226 Difference]: Without dead ends: 4561 [2021-07-09 18:18:19,731 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1444.3ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:18:19,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-07-09 18:18:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3260. [2021-07-09 18:18:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3260 states, 3259 states have (on average 2.5477140227063515) internal successors, (8303), 3259 states have internal predecessors, (8303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:19,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 8303 transitions. [2021-07-09 18:18:19,780 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 8303 transitions. Word has length 30 [2021-07-09 18:18:19,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:19,780 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 8303 transitions. [2021-07-09 18:18:19,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:19,780 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 8303 transitions. [2021-07-09 18:18:19,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:19,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:19,783 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:19,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:19,994 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:19,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:19,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1372978863, now seen corresponding path program 63 times [2021-07-09 18:18:19,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:19,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133900443] [2021-07-09 18:18:19,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:19,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:18:20,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:20,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133900443] [2021-07-09 18:18:20,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133900443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:20,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973019176] [2021-07-09 18:18:20,260 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:20,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:18:20,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:20,285 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:18:20,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:20,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:20,634 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:20,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:20,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:20,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:20,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:20,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:20,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:20,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:20,695 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:20,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 151 [2021-07-09 18:18:20,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 18:18:20,865 INFO L628 ElimStorePlain]: treesize reduction 56, result has 40.4 percent of original size [2021-07-09 18:18:20,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:20,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:74 [2021-07-09 18:18:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:21,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973019176] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:21,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:21,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-07-09 18:18:21,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692473102] [2021-07-09 18:18:21,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:18:21,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:21,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:18:21,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:18:21,014 INFO L87 Difference]: Start difference. First operand 3260 states and 8303 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:24,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:24,372 INFO L93 Difference]: Finished difference Result 4752 states and 11666 transitions. [2021-07-09 18:18:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-07-09 18:18:24,373 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:24,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:24,379 INFO L225 Difference]: With dead ends: 4752 [2021-07-09 18:18:24,379 INFO L226 Difference]: Without dead ends: 4721 [2021-07-09 18:18:24,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 3180.7ms TimeCoverageRelationStatistics Valid=917, Invalid=6565, Unknown=0, NotChecked=0, Total=7482 [2021-07-09 18:18:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-07-09 18:18:24,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 3277. [2021-07-09 18:18:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3277 states, 3276 states have (on average 2.5467032967032965) internal successors, (8343), 3276 states have internal predecessors, (8343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:24,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 8343 transitions. [2021-07-09 18:18:24,430 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 8343 transitions. Word has length 30 [2021-07-09 18:18:24,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:24,430 INFO L482 AbstractCegarLoop]: Abstraction has 3277 states and 8343 transitions. [2021-07-09 18:18:24,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 28 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:24,431 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 8343 transitions. [2021-07-09 18:18:24,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:24,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:24,434 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:24,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 18:18:24,649 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:24,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:24,650 INFO L82 PathProgramCache]: Analyzing trace with hash 156127441, now seen corresponding path program 64 times [2021-07-09 18:18:24,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:24,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940775771] [2021-07-09 18:18:24,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:18:24,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:24,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940775771] [2021-07-09 18:18:24,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940775771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:24,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391249530] [2021-07-09 18:18:24,840 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:24,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:24,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:24,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:24,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:25,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:25,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:25,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:25,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:25,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:25,099 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:25,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:25,100 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:25,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:25,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:25,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:25,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:25,103 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:25,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:25,105 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:25,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:25,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:25,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:25,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391249530] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:25,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:25,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:18:25,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842042777] [2021-07-09 18:18:25,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:25,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:25,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:25,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:25,132 INFO L87 Difference]: Start difference. First operand 3277 states and 8343 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:26,811 INFO L93 Difference]: Finished difference Result 3751 states and 9329 transitions. [2021-07-09 18:18:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:18:26,812 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 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 30 [2021-07-09 18:18:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:26,816 INFO L225 Difference]: With dead ends: 3751 [2021-07-09 18:18:26,816 INFO L226 Difference]: Without dead ends: 3733 [2021-07-09 18:18:26,817 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1494.5ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:18:26,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-07-09 18:18:26,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3270. [2021-07-09 18:18:26,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3270 states, 3269 states have (on average 2.5457326399510554) internal successors, (8322), 3269 states have internal predecessors, (8322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:26,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 8322 transitions. [2021-07-09 18:18:26,851 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 8322 transitions. Word has length 30 [2021-07-09 18:18:26,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:26,852 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 8322 transitions. [2021-07-09 18:18:26,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:26,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 8322 transitions. [2021-07-09 18:18:26,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:26,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:26,854 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:27,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-07-09 18:18:27,065 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:27,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:27,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1969334097, now seen corresponding path program 65 times [2021-07-09 18:18:27,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:27,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237088932] [2021-07-09 18:18:27,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:27,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:27,294 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:27,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:27,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237088932] [2021-07-09 18:18:27,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237088932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:27,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207620863] [2021-07-09 18:18:27,294 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:27,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:18:27,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:27,332 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:27,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:27,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:27,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:27,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:27,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:27,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:27,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:27,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:27,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:27,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:27,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:27,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:27,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:27,566 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:27,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:27,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:27,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:27,573 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:27,573 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:27,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207620863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:27,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:27,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:18:27,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97807478] [2021-07-09 18:18:27,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:18:27,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:27,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:18:27,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:27,590 INFO L87 Difference]: Start difference. First operand 3270 states and 8322 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:28,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:28,333 INFO L93 Difference]: Finished difference Result 3590 states and 8850 transitions. [2021-07-09 18:18:28,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 18:18:28,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:28,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:28,338 INFO L225 Difference]: With dead ends: 3590 [2021-07-09 18:18:28,338 INFO L226 Difference]: Without dead ends: 3563 [2021-07-09 18:18:28,338 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 794.6ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 18:18:28,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-07-09 18:18:28,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3273. [2021-07-09 18:18:28,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3273 states, 3272 states have (on average 2.5403422982885084) internal successors, (8312), 3272 states have internal predecessors, (8312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:28,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 8312 transitions. [2021-07-09 18:18:28,428 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 8312 transitions. Word has length 30 [2021-07-09 18:18:28,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:28,428 INFO L482 AbstractCegarLoop]: Abstraction has 3273 states and 8312 transitions. [2021-07-09 18:18:28,428 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:28,428 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 8312 transitions. [2021-07-09 18:18:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:28,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:28,432 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:28,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:28,648 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:28,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:28,648 INFO L82 PathProgramCache]: Analyzing trace with hash 255609963, now seen corresponding path program 66 times [2021-07-09 18:18:28,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:28,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316660786] [2021-07-09 18:18:28,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:28,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:28,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316660786] [2021-07-09 18:18:28,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316660786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:28,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502160380] [2021-07-09 18:18:28,904 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 [2021-07-09 18:18:28,932 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:18:28,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:28,935 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:18:28,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:29,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:29,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:29,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:29,253 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:29,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:29,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:29,282 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:29,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-07-09 18:18:29,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:18:29,367 INFO L628 ElimStorePlain]: treesize reduction 92, result has 29.2 percent of original size [2021-07-09 18:18:29,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:29,372 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-07-09 18:18:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:29,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502160380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:29,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:29,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-07-09 18:18:29,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100346924] [2021-07-09 18:18:29,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:18:29,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:29,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:18:29,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:18:29,475 INFO L87 Difference]: Start difference. First operand 3273 states and 8312 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:32,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:32,121 INFO L93 Difference]: Finished difference Result 4934 states and 12188 transitions. [2021-07-09 18:18:32,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:18:32,121 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:32,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:32,127 INFO L225 Difference]: With dead ends: 4934 [2021-07-09 18:18:32,127 INFO L226 Difference]: Without dead ends: 4898 [2021-07-09 18:18:32,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2553.7ms TimeCoverageRelationStatistics Valid=851, Invalid=3979, Unknown=0, NotChecked=0, Total=4830 [2021-07-09 18:18:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-07-09 18:18:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 3309. [2021-07-09 18:18:32,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3309 states, 3308 states have (on average 2.557738814993954) internal successors, (8461), 3308 states have internal predecessors, (8461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 8461 transitions. [2021-07-09 18:18:32,178 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 8461 transitions. Word has length 30 [2021-07-09 18:18:32,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:32,178 INFO L482 AbstractCegarLoop]: Abstraction has 3309 states and 8461 transitions. [2021-07-09 18:18:32,178 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 8461 transitions. [2021-07-09 18:18:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:32,181 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:32,181 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:32,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:32,397 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:32,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:32,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1475159769, now seen corresponding path program 67 times [2021-07-09 18:18:32,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:32,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466507286] [2021-07-09 18:18:32,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:32,633 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:32,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:32,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466507286] [2021-07-09 18:18:32,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466507286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:32,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9799376] [2021-07-09 18:18:32,634 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 [2021-07-09 18:18:32,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:32,657 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:32,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:32,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:32,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:32,881 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:32,882 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:32,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:32,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:32,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:32,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:32,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:32,908 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:32,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9799376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:32,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:32,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:18:32,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200792751] [2021-07-09 18:18:32,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:18:32,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:32,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:18:32,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:32,909 INFO L87 Difference]: Start difference. First operand 3309 states and 8461 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:34,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:34,498 INFO L93 Difference]: Finished difference Result 3897 states and 9765 transitions. [2021-07-09 18:18:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:18:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-07-09 18:18:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:34,503 INFO L225 Difference]: With dead ends: 3897 [2021-07-09 18:18:34,503 INFO L226 Difference]: Without dead ends: 3871 [2021-07-09 18:18:34,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1424.6ms TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:18:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-07-09 18:18:34,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3131. [2021-07-09 18:18:34,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 3130 states have (on average 2.537699680511182) internal successors, (7943), 3130 states have internal predecessors, (7943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 7943 transitions. [2021-07-09 18:18:34,545 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 7943 transitions. Word has length 30 [2021-07-09 18:18:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:34,545 INFO L482 AbstractCegarLoop]: Abstraction has 3131 states and 7943 transitions. [2021-07-09 18:18:34,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 7943 transitions. [2021-07-09 18:18:34,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:34,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:34,548 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:34,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:34,764 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:34,764 INFO L82 PathProgramCache]: Analyzing trace with hash 921316715, now seen corresponding path program 68 times [2021-07-09 18:18:34,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:34,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501530112] [2021-07-09 18:18:34,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:34,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:34,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501530112] [2021-07-09 18:18:34,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501530112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:34,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538080975] [2021-07-09 18:18:34,997 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 [2021-07-09 18:18:35,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:35,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:35,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:35,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:35,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:35,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:35,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:35,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:35,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:35,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:35,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:35,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:35,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:35,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:35,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:35,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:35,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:35,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:35,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:35,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:35,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:35,283 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:35,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538080975] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:35,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:35,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:18:35,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780185451] [2021-07-09 18:18:35,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:18:35,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:35,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:18:35,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:35,284 INFO L87 Difference]: Start difference. First operand 3131 states and 7943 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:36,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:36,976 INFO L93 Difference]: Finished difference Result 3917 states and 9722 transitions. [2021-07-09 18:18:36,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:18:36,976 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-07-09 18:18:36,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:36,981 INFO L225 Difference]: With dead ends: 3917 [2021-07-09 18:18:36,981 INFO L226 Difference]: Without dead ends: 3891 [2021-07-09 18:18:36,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 1512.8ms TimeCoverageRelationStatistics Valid=494, Invalid=2698, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 18:18:36,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-07-09 18:18:37,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3229. [2021-07-09 18:18:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3229 states, 3228 states have (on average 2.537174721189591) internal successors, (8190), 3228 states have internal predecessors, (8190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:37,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 8190 transitions. [2021-07-09 18:18:37,021 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 8190 transitions. Word has length 30 [2021-07-09 18:18:37,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:37,021 INFO L482 AbstractCegarLoop]: Abstraction has 3229 states and 8190 transitions. [2021-07-09 18:18:37,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:37,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 8190 transitions. [2021-07-09 18:18:37,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:37,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:37,024 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:37,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:37,237 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:37,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:37,237 INFO L82 PathProgramCache]: Analyzing trace with hash 2116019763, now seen corresponding path program 69 times [2021-07-09 18:18:37,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:37,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102960585] [2021-07-09 18:18:37,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:37,494 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:37,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:37,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102960585] [2021-07-09 18:18:37,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102960585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:37,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841348450] [2021-07-09 18:18:37,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:37,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:18:37,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:37,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:18:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:37,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:37,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:37,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:37,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:37,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:37,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:37,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:37,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-07-09 18:18:38,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:18:38,492 INFO L628 ElimStorePlain]: treesize reduction 387, result has 8.9 percent of original size [2021-07-09 18:18:38,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:38,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-07-09 18:18:38,599 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:38,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841348450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:38,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:38,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-07-09 18:18:38,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304896689] [2021-07-09 18:18:38,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:18:38,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:38,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:18:38,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:18:38,600 INFO L87 Difference]: Start difference. First operand 3229 states and 8190 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:40,932 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2021-07-09 18:18:41,555 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-07-09 18:18:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:42,319 INFO L93 Difference]: Finished difference Result 4685 states and 11648 transitions. [2021-07-09 18:18:42,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 18:18:42,320 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:42,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:42,326 INFO L225 Difference]: With dead ends: 4685 [2021-07-09 18:18:42,326 INFO L226 Difference]: Without dead ends: 4633 [2021-07-09 18:18:42,326 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 3456.5ms TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:18:42,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-07-09 18:18:42,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 3370. [2021-07-09 18:18:42,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3370 states, 3369 states have (on average 2.553873552983081) internal successors, (8604), 3369 states have internal predecessors, (8604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:42,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 8604 transitions. [2021-07-09 18:18:42,379 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 8604 transitions. Word has length 30 [2021-07-09 18:18:42,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:42,379 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 8604 transitions. [2021-07-09 18:18:42,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:42,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 8604 transitions. [2021-07-09 18:18:42,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:42,384 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:42,384 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:42,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-07-09 18:18:42,587 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:42,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:42,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1215646195, now seen corresponding path program 70 times [2021-07-09 18:18:42,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:42,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678313175] [2021-07-09 18:18:42,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:42,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:42,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678313175] [2021-07-09 18:18:42,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678313175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:42,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242399665] [2021-07-09 18:18:42,810 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:42,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:42,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:42,833 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:42,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:43,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,075 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:43,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:43,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:43,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:43,080 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:43,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:43,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:43,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:43,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:43,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:43,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242399665] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:43,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:43,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:18:43,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723510961] [2021-07-09 18:18:43,107 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:18:43,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:43,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:18:43,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:18:43,108 INFO L87 Difference]: Start difference. First operand 3370 states and 8604 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:44,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:44,337 INFO L93 Difference]: Finished difference Result 3767 states and 9411 transitions. [2021-07-09 18:18:44,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-09 18:18:44,338 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:44,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:44,342 INFO L225 Difference]: With dead ends: 3767 [2021-07-09 18:18:44,342 INFO L226 Difference]: Without dead ends: 3736 [2021-07-09 18:18:44,343 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1134.6ms TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 18:18:44,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-07-09 18:18:44,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3431. [2021-07-09 18:18:44,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3431 states, 3430 states have (on average 2.53731778425656) internal successors, (8703), 3430 states have internal predecessors, (8703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 8703 transitions. [2021-07-09 18:18:44,395 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 8703 transitions. Word has length 30 [2021-07-09 18:18:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:44,395 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 8703 transitions. [2021-07-09 18:18:44,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 8703 transitions. [2021-07-09 18:18:44,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:44,399 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:44,399 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:44,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-07-09 18:18:44,609 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:44,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:44,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1042549111, now seen corresponding path program 71 times [2021-07-09 18:18:44,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:44,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248792920] [2021-07-09 18:18:44,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:44,895 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:44,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:44,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248792920] [2021-07-09 18:18:44,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248792920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:44,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980669618] [2021-07-09 18:18:44,896 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:44,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:18:44,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:44,920 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:44,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:45,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:45,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:45,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:45,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:45,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:45,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:45,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:45,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:45,174 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:45,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:45,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:45,176 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:45,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:45,177 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:45,178 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:45,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:45,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:45,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:45,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980669618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:45,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:45,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-09 18:18:45,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541246855] [2021-07-09 18:18:45,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:18:45,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:45,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:18:45,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:18:45,203 INFO L87 Difference]: Start difference. First operand 3431 states and 8703 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:46,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:46,579 INFO L93 Difference]: Finished difference Result 4784 states and 11766 transitions. [2021-07-09 18:18:46,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:18:46,579 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:46,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:46,586 INFO L225 Difference]: With dead ends: 4784 [2021-07-09 18:18:46,586 INFO L226 Difference]: Without dead ends: 4733 [2021-07-09 18:18:46,586 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1332.9ms TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:18:46,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-07-09 18:18:46,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 3433. [2021-07-09 18:18:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 2.5367132867132867) internal successors, (8706), 3432 states have internal predecessors, (8706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 8706 transitions. [2021-07-09 18:18:46,649 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 8706 transitions. Word has length 30 [2021-07-09 18:18:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:46,649 INFO L482 AbstractCegarLoop]: Abstraction has 3433 states and 8706 transitions. [2021-07-09 18:18:46,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 8706 transitions. [2021-07-09 18:18:46,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:46,653 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:46,653 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:46,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:46,869 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:46,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:46,869 INFO L82 PathProgramCache]: Analyzing trace with hash 190286455, now seen corresponding path program 72 times [2021-07-09 18:18:46,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:46,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696260148] [2021-07-09 18:18:46,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:47,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:47,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696260148] [2021-07-09 18:18:47,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696260148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:47,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912557420] [2021-07-09 18:18:47,127 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:47,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:18:47,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:47,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:18:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:47,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:47,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:47,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:47,525 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:47,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:47,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:47,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:47,533 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:47,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:47,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-07-09 18:18:47,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:18:47,616 INFO L628 ElimStorePlain]: treesize reduction 96, result has 28.4 percent of original size [2021-07-09 18:18:47,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:47,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-07-09 18:18:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:47,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912557420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:47,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:47,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-07-09 18:18:47,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783851929] [2021-07-09 18:18:47,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:18:47,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:47,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:18:47,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:47,699 INFO L87 Difference]: Start difference. First operand 3433 states and 8706 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:49,996 INFO L93 Difference]: Finished difference Result 4909 states and 12103 transitions. [2021-07-09 18:18:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-07-09 18:18:49,997 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:50,003 INFO L225 Difference]: With dead ends: 4909 [2021-07-09 18:18:50,003 INFO L226 Difference]: Without dead ends: 4866 [2021-07-09 18:18:50,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 2378.7ms TimeCoverageRelationStatistics Valid=894, Invalid=4508, Unknown=0, NotChecked=0, Total=5402 [2021-07-09 18:18:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-07-09 18:18:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3622. [2021-07-09 18:18:50,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3622 states, 3621 states have (on average 2.528030930682132) internal successors, (9154), 3621 states have internal predecessors, (9154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 9154 transitions. [2021-07-09 18:18:50,055 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 9154 transitions. Word has length 30 [2021-07-09 18:18:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:50,055 INFO L482 AbstractCegarLoop]: Abstraction has 3622 states and 9154 transitions. [2021-07-09 18:18:50,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 9154 transitions. [2021-07-09 18:18:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:50,059 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:50,066 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:50,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:50,281 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:50,281 INFO L82 PathProgramCache]: Analyzing trace with hash 760018863, now seen corresponding path program 73 times [2021-07-09 18:18:50,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:50,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209965397] [2021-07-09 18:18:50,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:50,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:50,518 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:50,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:50,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209965397] [2021-07-09 18:18:50,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209965397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:50,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363086333] [2021-07-09 18:18:50,519 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:50,554 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:50,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:50,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:50,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:50,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:50,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:50,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:50,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:50,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:50,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:50,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:50,848 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:50,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:50,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:50,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:50,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:50,855 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:50,856 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:50,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:50,871 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:50,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363086333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:50,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:50,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:18:50,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466245272] [2021-07-09 18:18:50,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:50,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:50,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:50,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:50,871 INFO L87 Difference]: Start difference. First operand 3622 states and 9154 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:52,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:52,205 INFO L93 Difference]: Finished difference Result 3927 states and 9781 transitions. [2021-07-09 18:18:52,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:18:52,206 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:52,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:52,211 INFO L225 Difference]: With dead ends: 3927 [2021-07-09 18:18:52,211 INFO L226 Difference]: Without dead ends: 3899 [2021-07-09 18:18:52,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1347.0ms TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:18:52,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2021-07-09 18:18:52,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3664. [2021-07-09 18:18:52,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3664 states, 3663 states have (on average 2.5263445263445266) internal successors, (9254), 3663 states have internal predecessors, (9254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:52,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 9254 transitions. [2021-07-09 18:18:52,254 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 9254 transitions. Word has length 30 [2021-07-09 18:18:52,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:52,254 INFO L482 AbstractCegarLoop]: Abstraction has 3664 states and 9254 transitions. [2021-07-09 18:18:52,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:52,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 9254 transitions. [2021-07-09 18:18:52,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:52,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:52,258 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:52,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:52,473 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:52,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:52,473 INFO L82 PathProgramCache]: Analyzing trace with hash -224198605, now seen corresponding path program 74 times [2021-07-09 18:18:52,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:52,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025199335] [2021-07-09 18:18:52,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:52,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025199335] [2021-07-09 18:18:52,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025199335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902826632] [2021-07-09 18:18:52,724 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:52,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:18:52,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:52,824 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:52,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:53,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:53,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:53,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:53,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:53,117 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:53,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:53,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:53,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:53,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:53,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:53,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:53,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:53,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:53,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:53,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:53,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:53,143 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:53,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902826632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:53,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:53,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:18:53,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497752051] [2021-07-09 18:18:53,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:53,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:53,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:53,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:53,144 INFO L87 Difference]: Start difference. First operand 3664 states and 9254 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:54,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:54,054 INFO L93 Difference]: Finished difference Result 4402 states and 10861 transitions. [2021-07-09 18:18:54,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 18:18:54,054 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:54,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:54,060 INFO L225 Difference]: With dead ends: 4402 [2021-07-09 18:18:54,060 INFO L226 Difference]: Without dead ends: 4365 [2021-07-09 18:18:54,061 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 948.9ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 18:18:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2021-07-09 18:18:54,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 3871. [2021-07-09 18:18:54,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3871 states, 3870 states have (on average 2.5322997416020674) internal successors, (9800), 3870 states have internal predecessors, (9800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:54,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 9800 transitions. [2021-07-09 18:18:54,109 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 9800 transitions. Word has length 30 [2021-07-09 18:18:54,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:54,109 INFO L482 AbstractCegarLoop]: Abstraction has 3871 states and 9800 transitions. [2021-07-09 18:18:54,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:54,110 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 9800 transitions. [2021-07-09 18:18:54,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:54,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:54,113 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:54,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:54,315 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:54,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:54,315 INFO L82 PathProgramCache]: Analyzing trace with hash 2000745455, now seen corresponding path program 75 times [2021-07-09 18:18:54,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:54,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882864037] [2021-07-09 18:18:54,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:54,561 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:54,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:54,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882864037] [2021-07-09 18:18:54,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882864037] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:54,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187163607] [2021-07-09 18:18:54,561 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:54,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:18:54,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:54,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:18:54,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:54,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:54,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:54,997 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:54,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 81 treesize of output 157 [2021-07-09 18:18:55,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:18:55,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:55,083 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:55,083 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:46 [2021-07-09 18:18:55,221 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:55,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187163607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:55,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:55,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-07-09 18:18:55,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101904819] [2021-07-09 18:18:55,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:18:55,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:55,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:18:55,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:18:55,222 INFO L87 Difference]: Start difference. First operand 3871 states and 9800 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:57,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:18:57,858 INFO L93 Difference]: Finished difference Result 4724 states and 11672 transitions. [2021-07-09 18:18:57,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:18:57,859 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:18:57,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:18:57,865 INFO L225 Difference]: With dead ends: 4724 [2021-07-09 18:18:57,865 INFO L226 Difference]: Without dead ends: 4685 [2021-07-09 18:18:57,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 2435.3ms TimeCoverageRelationStatistics Valid=538, Invalid=4154, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:18:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2021-07-09 18:18:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 4113. [2021-07-09 18:18:57,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4113 states, 4112 states have (on average 2.524805447470817) internal successors, (10382), 4112 states have internal predecessors, (10382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:57,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 10382 transitions. [2021-07-09 18:18:57,916 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 10382 transitions. Word has length 30 [2021-07-09 18:18:57,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:18:57,917 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 10382 transitions. [2021-07-09 18:18:57,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:18:57,917 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 10382 transitions. [2021-07-09 18:18:57,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:18:57,921 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:18:57,921 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:18:58,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-07-09 18:18:58,137 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:18:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:18:58,137 INFO L82 PathProgramCache]: Analyzing trace with hash 269975723, now seen corresponding path program 76 times [2021-07-09 18:18:58,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:18:58,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982970818] [2021-07-09 18:18:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:18:58,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:18:58,397 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:18:58,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:18:58,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982970818] [2021-07-09 18:18:58,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982970818] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:58,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980301802] [2021-07-09 18:18:58,398 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:18:58,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:18:58,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:18:58,428 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:18:58,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:18:58,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:58,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:58,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:58,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:58,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:58,666 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:58,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:58,667 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:58,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:58,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:18:58,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:18:58,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:18:58,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:18:58,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:18:58,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:18:58,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:18:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:18:58,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980301802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:18:58,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:18:58,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:18:58,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721046877] [2021-07-09 18:18:58,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:18:58,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:18:58,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:18:58,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:18:58,697 INFO L87 Difference]: Start difference. First operand 4113 states and 10382 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:00,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:00,700 INFO L93 Difference]: Finished difference Result 4964 states and 12268 transitions. [2021-07-09 18:19:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 18:19:00,700 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:00,706 INFO L225 Difference]: With dead ends: 4964 [2021-07-09 18:19:00,706 INFO L226 Difference]: Without dead ends: 4899 [2021-07-09 18:19:00,706 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1732.0ms TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:19:00,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-07-09 18:19:00,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4207. [2021-07-09 18:19:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 2.5202092249167856) internal successors, (10600), 4206 states have internal predecessors, (10600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:00,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 10600 transitions. [2021-07-09 18:19:00,756 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 10600 transitions. Word has length 30 [2021-07-09 18:19:00,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:00,756 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 10600 transitions. [2021-07-09 18:19:00,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:00,756 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 10600 transitions. [2021-07-09 18:19:00,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:00,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:00,760 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:00,973 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-09 18:19:00,973 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:00,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:00,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1628515089, now seen corresponding path program 77 times [2021-07-09 18:19:00,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:00,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346666722] [2021-07-09 18:19:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:00,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:01,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346666722] [2021-07-09 18:19:01,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346666722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:01,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070597693] [2021-07-09 18:19:01,216 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:01,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 18:19:01,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:01,241 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:01,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:01,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:01,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,488 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:01,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:01,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:01,490 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:01,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:01,492 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:01,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:01,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:01,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:01,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070597693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:01,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:01,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:19:01,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780906297] [2021-07-09 18:19:01,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:19:01,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:01,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:19:01,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:19:01,517 INFO L87 Difference]: Start difference. First operand 4207 states and 10600 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:03,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:03,228 INFO L93 Difference]: Finished difference Result 4760 states and 11847 transitions. [2021-07-09 18:19:03,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:19:03,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:03,235 INFO L225 Difference]: With dead ends: 4760 [2021-07-09 18:19:03,235 INFO L226 Difference]: Without dead ends: 4720 [2021-07-09 18:19:03,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1532.8ms TimeCoverageRelationStatistics Valid=360, Invalid=2396, Unknown=0, NotChecked=0, Total=2756 [2021-07-09 18:19:03,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4720 states. [2021-07-09 18:19:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4720 to 4245. [2021-07-09 18:19:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4245 states, 4244 states have (on average 2.5155513666352496) internal successors, (10676), 4244 states have internal predecessors, (10676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:03,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 10676 transitions. [2021-07-09 18:19:03,290 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 10676 transitions. Word has length 30 [2021-07-09 18:19:03,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:03,290 INFO L482 AbstractCegarLoop]: Abstraction has 4245 states and 10676 transitions. [2021-07-09 18:19:03,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:03,290 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 10676 transitions. [2021-07-09 18:19:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:03,301 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:03,301 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:03,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-09 18:19:03,518 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:03,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:03,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1834453521, now seen corresponding path program 78 times [2021-07-09 18:19:03,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:03,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171457609] [2021-07-09 18:19:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:03,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:03,793 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:03,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171457609] [2021-07-09 18:19:03,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171457609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:03,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209748071] [2021-07-09 18:19:03,794 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:03,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 18:19:03,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:03,818 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:03,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:04,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:04,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,057 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,058 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:04,059 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:04,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:04,060 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:04,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:04,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:04,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:04,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:04,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:04,090 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:04,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209748071] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:04,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:04,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:19:04,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862812687] [2021-07-09 18:19:04,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:19:04,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:04,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:19:04,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:19:04,091 INFO L87 Difference]: Start difference. First operand 4245 states and 10676 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:06,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:06,241 INFO L93 Difference]: Finished difference Result 4832 states and 11925 transitions. [2021-07-09 18:19:06,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:19:06,242 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-07-09 18:19:06,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:06,248 INFO L225 Difference]: With dead ends: 4832 [2021-07-09 18:19:06,248 INFO L226 Difference]: Without dead ends: 4777 [2021-07-09 18:19:06,248 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1874.8ms TimeCoverageRelationStatistics Valid=470, Invalid=3070, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:19:06,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-07-09 18:19:06,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4315. [2021-07-09 18:19:06,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4315 states, 4314 states have (on average 2.5127491886879927) internal successors, (10840), 4314 states have internal predecessors, (10840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4315 states to 4315 states and 10840 transitions. [2021-07-09 18:19:06,301 INFO L78 Accepts]: Start accepts. Automaton has 4315 states and 10840 transitions. Word has length 30 [2021-07-09 18:19:06,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:06,301 INFO L482 AbstractCegarLoop]: Abstraction has 4315 states and 10840 transitions. [2021-07-09 18:19:06,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:06,301 INFO L276 IsEmpty]: Start isEmpty. Operand 4315 states and 10840 transitions. [2021-07-09 18:19:06,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:06,306 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:06,306 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:06,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:06,507 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1966954945, now seen corresponding path program 79 times [2021-07-09 18:19:06,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:06,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159459314] [2021-07-09 18:19:06,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:06,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:06,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159459314] [2021-07-09 18:19:06,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159459314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:06,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732890501] [2021-07-09 18:19:06,810 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:06,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:06,840 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:06,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:07,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:07,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:07,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:07,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:07,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:07,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:07,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:07,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:07,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:07,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:07,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732890501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:07,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:07,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-09 18:19:07,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104386891] [2021-07-09 18:19:07,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:07,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:07,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:07,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:07,146 INFO L87 Difference]: Start difference. First operand 4315 states and 10840 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:08,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:08,899 INFO L93 Difference]: Finished difference Result 5809 states and 14168 transitions. [2021-07-09 18:19:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:19:08,899 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:08,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:08,906 INFO L225 Difference]: With dead ends: 5809 [2021-07-09 18:19:08,906 INFO L226 Difference]: Without dead ends: 5760 [2021-07-09 18:19:08,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1542.6ms TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:19:08,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-07-09 18:19:08,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 4424. [2021-07-09 18:19:08,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4424 states, 4423 states have (on average 2.5130002260908886) internal successors, (11115), 4423 states have internal predecessors, (11115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:08,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 11115 transitions. [2021-07-09 18:19:08,967 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 11115 transitions. Word has length 30 [2021-07-09 18:19:08,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:08,968 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 11115 transitions. [2021-07-09 18:19:08,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:08,968 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 11115 transitions. [2021-07-09 18:19:08,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:08,973 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:08,973 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:09,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-09 18:19:09,190 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:09,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:09,190 INFO L82 PathProgramCache]: Analyzing trace with hash -477602821, now seen corresponding path program 80 times [2021-07-09 18:19:09,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:09,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209352545] [2021-07-09 18:19:09,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:09,480 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:09,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:09,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209352545] [2021-07-09 18:19:09,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209352545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:09,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537206052] [2021-07-09 18:19:09,480 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:09,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:09,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:09,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:09,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:09,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:09,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:09,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:09,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:09,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:09,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:09,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:09,768 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:09,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:09,769 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:09,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:09,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:09,775 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:09,776 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:09,776 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:09,794 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:09,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537206052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:09,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:09,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-09 18:19:09,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561036532] [2021-07-09 18:19:09,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:09,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:09,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:09,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:09,795 INFO L87 Difference]: Start difference. First operand 4424 states and 11115 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:11,321 INFO L93 Difference]: Finished difference Result 5600 states and 13788 transitions. [2021-07-09 18:19:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:19:11,321 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:11,328 INFO L225 Difference]: With dead ends: 5600 [2021-07-09 18:19:11,329 INFO L226 Difference]: Without dead ends: 5549 [2021-07-09 18:19:11,329 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1387.1ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:19:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2021-07-09 18:19:11,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 4477. [2021-07-09 18:19:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4477 states, 4476 states have (on average 2.507372654155496) internal successors, (11223), 4476 states have internal predecessors, (11223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 11223 transitions. [2021-07-09 18:19:11,388 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 11223 transitions. Word has length 30 [2021-07-09 18:19:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:11,388 INFO L482 AbstractCegarLoop]: Abstraction has 4477 states and 11223 transitions. [2021-07-09 18:19:11,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 11223 transitions. [2021-07-09 18:19:11,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:11,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:11,393 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:11,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:11,602 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:11,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:11,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1462264581, now seen corresponding path program 81 times [2021-07-09 18:19:11,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:11,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577679328] [2021-07-09 18:19:11,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:11,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:11,881 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:11,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577679328] [2021-07-09 18:19:11,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577679328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:11,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416854365] [2021-07-09 18:19:11,881 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:11,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:19:11,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:11,970 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-07-09 18:19:11,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:12,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:12,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:12,367 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:12,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:12,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:12,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:12,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-07-09 18:19:12,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-07-09 18:19:13,058 INFO L628 ElimStorePlain]: treesize reduction 578, result has 6.2 percent of original size [2021-07-09 18:19:13,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:13,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-07-09 18:19:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:13,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416854365] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:13,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:13,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-07-09 18:19:13,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269046175] [2021-07-09 18:19:13,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:19:13,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:13,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:19:13,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:19:13,196 INFO L87 Difference]: Start difference. First operand 4477 states and 11223 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:15,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:15,774 INFO L93 Difference]: Finished difference Result 5628 states and 13862 transitions. [2021-07-09 18:19:15,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:19:15,774 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:15,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:15,781 INFO L225 Difference]: With dead ends: 5628 [2021-07-09 18:19:15,781 INFO L226 Difference]: Without dead ends: 5604 [2021-07-09 18:19:15,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2545.3ms TimeCoverageRelationStatistics Valid=675, Invalid=3357, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:19:15,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-07-09 18:19:15,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 4485. [2021-07-09 18:19:15,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4485 states, 4484 states have (on average 2.5064674397859052) internal successors, (11239), 4484 states have internal predecessors, (11239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:15,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 11239 transitions. [2021-07-09 18:19:15,838 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 11239 transitions. Word has length 30 [2021-07-09 18:19:15,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:15,849 INFO L482 AbstractCegarLoop]: Abstraction has 4485 states and 11239 transitions. [2021-07-09 18:19:15,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:15,849 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 11239 transitions. [2021-07-09 18:19:15,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:15,854 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:15,854 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:16,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-07-09 18:19:16,061 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:16,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:16,061 INFO L82 PathProgramCache]: Analyzing trace with hash -1668203013, now seen corresponding path program 82 times [2021-07-09 18:19:16,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:16,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433027884] [2021-07-09 18:19:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:16,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:16,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433027884] [2021-07-09 18:19:16,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433027884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:16,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383335986] [2021-07-09 18:19:16,301 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:16,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:16,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:16,325 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:16,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:16,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:16,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:16,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:16,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:16,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:16,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:16,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:16,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:16,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:16,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:16,592 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:16,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383335986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:16,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:16,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:19:16,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151652924] [2021-07-09 18:19:16,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:19:16,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:16,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:19:16,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:19:16,593 INFO L87 Difference]: Start difference. First operand 4485 states and 11239 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:18,434 INFO L93 Difference]: Finished difference Result 5013 states and 12435 transitions. [2021-07-09 18:19:18,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:19:18,434 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-07-09 18:19:18,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:18,441 INFO L225 Difference]: With dead ends: 5013 [2021-07-09 18:19:18,441 INFO L226 Difference]: Without dead ends: 4984 [2021-07-09 18:19:18,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1734.4ms TimeCoverageRelationStatistics Valid=623, Invalid=3037, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:19:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2021-07-09 18:19:18,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 4423. [2021-07-09 18:19:18,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4423 states, 4422 states have (on average 2.4972862957937583) internal successors, (11043), 4422 states have internal predecessors, (11043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11043 transitions. [2021-07-09 18:19:18,497 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11043 transitions. Word has length 30 [2021-07-09 18:19:18,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:18,498 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11043 transitions. [2021-07-09 18:19:18,498 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:18,498 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11043 transitions. [2021-07-09 18:19:18,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:18,502 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:18,502 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:18,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:18,718 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:18,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:18,718 INFO L82 PathProgramCache]: Analyzing trace with hash 475012403, now seen corresponding path program 83 times [2021-07-09 18:19:18,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:18,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400765696] [2021-07-09 18:19:18,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:18,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:18,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:18,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400765696] [2021-07-09 18:19:18,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400765696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:18,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636600511] [2021-07-09 18:19:18,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:18,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:19:18,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:18,976 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:18,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:19,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,257 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:19,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:19,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:19,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:19,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:19,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:19,264 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:19,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:19,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:19,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:19,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636600511] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:19,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:19,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:19:19,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000585412] [2021-07-09 18:19:19,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:19:19,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:19,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:19:19,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:19:19,303 INFO L87 Difference]: Start difference. First operand 4423 states and 11043 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:20,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:20,772 INFO L93 Difference]: Finished difference Result 4995 states and 12313 transitions. [2021-07-09 18:19:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:19:20,773 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:20,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:20,779 INFO L225 Difference]: With dead ends: 4995 [2021-07-09 18:19:20,779 INFO L226 Difference]: Without dead ends: 4959 [2021-07-09 18:19:20,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1229.5ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-07-09 18:19:20,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-07-09 18:19:20,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4643. [2021-07-09 18:19:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.503015941404567) internal successors, (11619), 4642 states have internal predecessors, (11619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11619 transitions. [2021-07-09 18:19:20,835 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11619 transitions. Word has length 30 [2021-07-09 18:19:20,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:20,835 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11619 transitions. [2021-07-09 18:19:20,835 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11619 transitions. [2021-07-09 18:19:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:20,840 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:20,840 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:21,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2021-07-09 18:19:21,056 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:21,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:21,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1805369083, now seen corresponding path program 84 times [2021-07-09 18:19:21,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:21,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251117390] [2021-07-09 18:19:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:21,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:21,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:21,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251117390] [2021-07-09 18:19:21,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251117390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:21,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054571827] [2021-07-09 18:19:21,297 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:21,321 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:19:21,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:21,322 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-07-09 18:19:21,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:21,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,824 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:21,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:21,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:21,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 79 [2021-07-09 18:19:21,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:19:21,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:21,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:21,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:21 [2021-07-09 18:19:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:21,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054571827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:21,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:21,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-07-09 18:19:21,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697198788] [2021-07-09 18:19:21,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 18:19:21,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:21,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 18:19:21,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-07-09 18:19:21,947 INFO L87 Difference]: Start difference. First operand 4643 states and 11619 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:23,542 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2021-07-09 18:19:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:24,008 INFO L93 Difference]: Finished difference Result 5869 states and 14309 transitions. [2021-07-09 18:19:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:19:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:24,016 INFO L225 Difference]: With dead ends: 5869 [2021-07-09 18:19:24,016 INFO L226 Difference]: Without dead ends: 5852 [2021-07-09 18:19:24,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1832.4ms TimeCoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2021-07-09 18:19:24,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-07-09 18:19:24,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4657. [2021-07-09 18:19:24,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 2.5053694158075603) internal successors, (11665), 4656 states have internal predecessors, (11665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:24,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 11665 transitions. [2021-07-09 18:19:24,100 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 11665 transitions. Word has length 30 [2021-07-09 18:19:24,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:24,100 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 11665 transitions. [2021-07-09 18:19:24,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:24,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 11665 transitions. [2021-07-09 18:19:24,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:24,106 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:24,106 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:24,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-07-09 18:19:24,321 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:24,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1082897335, now seen corresponding path program 85 times [2021-07-09 18:19:24,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:24,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997182792] [2021-07-09 18:19:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:24,623 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:24,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:24,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997182792] [2021-07-09 18:19:24,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997182792] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:24,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716893129] [2021-07-09 18:19:24,623 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:24,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:24,661 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:24,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:24,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:24,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:24,913 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:24,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:24,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:24,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:24,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:24,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:24,918 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:24,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:24,919 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:24,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:24,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:24,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:24,928 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:24,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:24,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:24,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716893129] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:24,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:24,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-07-09 18:19:24,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793588103] [2021-07-09 18:19:24,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:24,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:24,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:24,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:24,948 INFO L87 Difference]: Start difference. First operand 4657 states and 11665 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:26,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:26,169 INFO L93 Difference]: Finished difference Result 5656 states and 13885 transitions. [2021-07-09 18:19:26,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 18:19:26,169 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:26,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:26,177 INFO L225 Difference]: With dead ends: 5656 [2021-07-09 18:19:26,177 INFO L226 Difference]: Without dead ends: 5619 [2021-07-09 18:19:26,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1297.9ms TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652 [2021-07-09 18:19:26,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2021-07-09 18:19:26,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 4600. [2021-07-09 18:19:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 2.5057621222004784) internal successors, (11524), 4599 states have internal predecessors, (11524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 11524 transitions. [2021-07-09 18:19:26,252 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 11524 transitions. Word has length 30 [2021-07-09 18:19:26,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:26,252 INFO L482 AbstractCegarLoop]: Abstraction has 4600 states and 11524 transitions. [2021-07-09 18:19:26,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:26,252 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 11524 transitions. [2021-07-09 18:19:26,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:26,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:26,257 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:26,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:26,473 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1193064333, now seen corresponding path program 86 times [2021-07-09 18:19:26,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:26,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332640791] [2021-07-09 18:19:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:26,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:26,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:26,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332640791] [2021-07-09 18:19:26,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332640791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:26,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761771763] [2021-07-09 18:19:26,690 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:26,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:26,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:26,713 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:26,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:26,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:26,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:26,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:26,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:26,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:26,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:26,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:26,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:26,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:26,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:26,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:26,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:26,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:26,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:26,952 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:26,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:26,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:26,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:26,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [761771763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:26,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:26,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:19:26,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777571630] [2021-07-09 18:19:26,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:19:26,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:19:26,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:19:26,978 INFO L87 Difference]: Start difference. First operand 4600 states and 11524 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:28,365 INFO L93 Difference]: Finished difference Result 5225 states and 12941 transitions. [2021-07-09 18:19:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 18:19:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:28,372 INFO L225 Difference]: With dead ends: 5225 [2021-07-09 18:19:28,372 INFO L226 Difference]: Without dead ends: 5199 [2021-07-09 18:19:28,373 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1341.6ms TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2021-07-09 18:19:28,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2021-07-09 18:19:28,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 4667. [2021-07-09 18:19:28,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.5053579082726105) internal successors, (11690), 4666 states have internal predecessors, (11690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 11690 transitions. [2021-07-09 18:19:28,432 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 11690 transitions. Word has length 30 [2021-07-09 18:19:28,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:28,433 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 11690 transitions. [2021-07-09 18:19:28,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:28,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 11690 transitions. [2021-07-09 18:19:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:28,437 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:28,437 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:28,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-07-09 18:19:28,653 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:28,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:28,653 INFO L82 PathProgramCache]: Analyzing trace with hash -84573205, now seen corresponding path program 87 times [2021-07-09 18:19:28,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:28,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566205284] [2021-07-09 18:19:28,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:28,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:28,847 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:28,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:28,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566205284] [2021-07-09 18:19:28,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566205284] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:28,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306063482] [2021-07-09 18:19:28,847 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:28,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:19:28,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:28,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-07-09 18:19:28,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:29,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:29,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:29,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:29,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:29,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:29,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:29,304 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:29,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 69 treesize of output 141 [2021-07-09 18:19:29,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-07-09 18:19:29,468 INFO L628 ElimStorePlain]: treesize reduction 68, result has 32.7 percent of original size [2021-07-09 18:19:29,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:29,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:27 [2021-07-09 18:19:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:29,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306063482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:29,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:29,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-07-09 18:19:29,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931174108] [2021-07-09 18:19:29,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:29,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:29,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:29,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:29,555 INFO L87 Difference]: Start difference. First operand 4667 states and 11690 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:31,606 INFO L93 Difference]: Finished difference Result 5151 states and 12701 transitions. [2021-07-09 18:19:31,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:19:31,607 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:31,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:31,614 INFO L225 Difference]: With dead ends: 5151 [2021-07-09 18:19:31,615 INFO L226 Difference]: Without dead ends: 5117 [2021-07-09 18:19:31,615 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1904.8ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:19:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-07-09 18:19:31,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4671. [2021-07-09 18:19:31,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4671 states, 4670 states have (on average 2.507494646680942) internal successors, (11710), 4670 states have internal predecessors, (11710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 11710 transitions. [2021-07-09 18:19:31,673 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 11710 transitions. Word has length 30 [2021-07-09 18:19:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:31,673 INFO L482 AbstractCegarLoop]: Abstraction has 4671 states and 11710 transitions. [2021-07-09 18:19:31,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 11710 transitions. [2021-07-09 18:19:31,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:31,678 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:31,678 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:31,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:31,894 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:31,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1813763767, now seen corresponding path program 88 times [2021-07-09 18:19:31,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:31,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248752526] [2021-07-09 18:19:31,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:32,125 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:32,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:32,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248752526] [2021-07-09 18:19:32,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248752526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:32,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706554965] [2021-07-09 18:19:32,126 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:32,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:32,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:32,149 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:32,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:32,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:32,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:32,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:32,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:32,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:32,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:32,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:32,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:32,432 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:32,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:32,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:32,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706554965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:32,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:32,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:19:32,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676544081] [2021-07-09 18:19:32,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:19:32,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:32,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:19:32,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:19:32,451 INFO L87 Difference]: Start difference. First operand 4671 states and 11710 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:33,601 INFO L93 Difference]: Finished difference Result 5215 states and 12829 transitions. [2021-07-09 18:19:33,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 18:19:33,602 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:33,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:33,609 INFO L225 Difference]: With dead ends: 5215 [2021-07-09 18:19:33,609 INFO L226 Difference]: Without dead ends: 5184 [2021-07-09 18:19:33,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 915.8ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 18:19:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-07-09 18:19:33,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 4822. [2021-07-09 18:19:33,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4822 states, 4821 states have (on average 2.5177349097697572) internal successors, (12138), 4821 states have internal predecessors, (12138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:33,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 12138 transitions. [2021-07-09 18:19:33,677 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 12138 transitions. Word has length 30 [2021-07-09 18:19:33,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:33,677 INFO L482 AbstractCegarLoop]: Abstraction has 4822 states and 12138 transitions. [2021-07-09 18:19:33,677 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:33,677 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 12138 transitions. [2021-07-09 18:19:33,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:33,683 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:33,683 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:33,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:33,897 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:33,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:33,897 INFO L82 PathProgramCache]: Analyzing trace with hash 409447283, now seen corresponding path program 89 times [2021-07-09 18:19:33,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:33,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495914222] [2021-07-09 18:19:33,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:33,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:34,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:34,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:34,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495914222] [2021-07-09 18:19:34,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495914222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:34,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168310057] [2021-07-09 18:19:34,099 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:34,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:19:34,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:34,123 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:34,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:34,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:34,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:34,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:34,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:34,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:34,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:34,350 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:34,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:34,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:34,353 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:34,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:34,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:34,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:34,359 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:34,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:34,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:34,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168310057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:34,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:34,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-07-09 18:19:34,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804001927] [2021-07-09 18:19:34,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:19:34,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:34,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:19:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:19:34,379 INFO L87 Difference]: Start difference. First operand 4822 states and 12138 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:36,126 INFO L93 Difference]: Finished difference Result 5370 states and 13300 transitions. [2021-07-09 18:19:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:19:36,126 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:36,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:36,134 INFO L225 Difference]: With dead ends: 5370 [2021-07-09 18:19:36,135 INFO L226 Difference]: Without dead ends: 5304 [2021-07-09 18:19:36,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1579.1ms TimeCoverageRelationStatistics Valid=473, Invalid=2833, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:19:36,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2021-07-09 18:19:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 4896. [2021-07-09 18:19:36,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4896 states, 4895 states have (on average 2.5141981613891726) internal successors, (12307), 4895 states have internal predecessors, (12307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 12307 transitions. [2021-07-09 18:19:36,203 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 12307 transitions. Word has length 30 [2021-07-09 18:19:36,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:36,204 INFO L482 AbstractCegarLoop]: Abstraction has 4896 states and 12307 transitions. [2021-07-09 18:19:36,204 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:36,204 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 12307 transitions. [2021-07-09 18:19:36,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:36,209 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:36,209 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:36,425 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:36,425 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:36,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:36,425 INFO L82 PathProgramCache]: Analyzing trace with hash 203508851, now seen corresponding path program 90 times [2021-07-09 18:19:36,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:36,425 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032875717] [2021-07-09 18:19:36,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:36,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:36,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032875717] [2021-07-09 18:19:36,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032875717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:36,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754034660] [2021-07-09 18:19:36,745 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:36,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 18:19:36,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:36,770 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:19:36,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:37,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:37,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:37,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:37,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:37,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:37,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:37,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:37,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:37,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 65 treesize of output 133 [2021-07-09 18:19:37,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:19:37,304 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:37,306 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:37,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:88, output treesize:41 [2021-07-09 18:19:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:37,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754034660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:37,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:37,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-07-09 18:19:37,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838379946] [2021-07-09 18:19:37,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 18:19:37,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:37,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 18:19:37,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-07-09 18:19:37,433 INFO L87 Difference]: Start difference. First operand 4896 states and 12307 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:39,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:39,297 INFO L93 Difference]: Finished difference Result 5271 states and 13100 transitions. [2021-07-09 18:19:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-09 18:19:39,298 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-09 18:19:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:39,304 INFO L225 Difference]: With dead ends: 5271 [2021-07-09 18:19:39,304 INFO L226 Difference]: Without dead ends: 5223 [2021-07-09 18:19:39,305 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1827.4ms TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:19:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-07-09 18:19:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4919. [2021-07-09 18:19:39,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.5122000813338756) internal successors, (12355), 4918 states have internal predecessors, (12355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:39,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 12355 transitions. [2021-07-09 18:19:39,366 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 12355 transitions. Word has length 30 [2021-07-09 18:19:39,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:39,366 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 12355 transitions. [2021-07-09 18:19:39,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:39,366 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 12355 transitions. [2021-07-09 18:19:39,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-09 18:19:39,371 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:39,371 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:39,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-07-09 18:19:39,588 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:39,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:39,588 INFO L82 PathProgramCache]: Analyzing trace with hash -134828685, now seen corresponding path program 91 times [2021-07-09 18:19:39,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:39,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614228803] [2021-07-09 18:19:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:39,843 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:39,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:39,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614228803] [2021-07-09 18:19:39,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614228803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:39,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494989902] [2021-07-09 18:19:39,843 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:39,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:39,875 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 18:19:39,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:40,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:40,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:40,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:40,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:40,119 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:40,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:40,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:40,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:40,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:19:40,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:40,123 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:19:40,123 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-07-09 18:19:40,124 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:19:40,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:19:40,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:19:40,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-07-09 18:19:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:40,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494989902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:40,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:40,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-07-09 18:19:40,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251692432] [2021-07-09 18:19:40,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:19:40,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:40,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:19:40,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:19:40,153 INFO L87 Difference]: Start difference. First operand 4919 states and 12355 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:42,035 INFO L93 Difference]: Finished difference Result 5304 states and 13161 transitions. [2021-07-09 18:19:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 18:19:42,036 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 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 30 [2021-07-09 18:19:42,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:42,043 INFO L225 Difference]: With dead ends: 5304 [2021-07-09 18:19:42,043 INFO L226 Difference]: Without dead ends: 5284 [2021-07-09 18:19:42,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1764.1ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 18:19:42,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-07-09 18:19:42,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4960. [2021-07-09 18:19:42,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4960 states, 4959 states have (on average 2.51401492236338) internal successors, (12467), 4959 states have internal predecessors, (12467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:42,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 12467 transitions. [2021-07-09 18:19:42,112 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 12467 transitions. Word has length 30 [2021-07-09 18:19:42,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:42,112 INFO L482 AbstractCegarLoop]: Abstraction has 4960 states and 12467 transitions. [2021-07-09 18:19:42,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:42,112 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 12467 transitions. [2021-07-09 18:19:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:19:42,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:42,117 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:42,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-09 18:19:42,333 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:42,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:42,333 INFO L82 PathProgramCache]: Analyzing trace with hash -672367353, now seen corresponding path program 92 times [2021-07-09 18:19:42,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:42,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760450747] [2021-07-09 18:19:42,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:42,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:42,406 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:42,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760450747] [2021-07-09 18:19:42,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760450747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:42,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540965586] [2021-07-09 18:19:42,406 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:42,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:42,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:42,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:19:42,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:42,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540965586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:42,617 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:42,617 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:42,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662573288] [2021-07-09 18:19:42,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:42,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:42,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:42,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:42,618 INFO L87 Difference]: Start difference. First operand 4960 states and 12467 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:43,524 INFO L93 Difference]: Finished difference Result 6004 states and 14671 transitions. [2021-07-09 18:19:43,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:19:43,524 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:19:43,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:43,533 INFO L225 Difference]: With dead ends: 6004 [2021-07-09 18:19:43,533 INFO L226 Difference]: Without dead ends: 6004 [2021-07-09 18:19:43,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 809.3ms TimeCoverageRelationStatistics Valid=1225, Invalid=3467, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:19:43,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2021-07-09 18:19:43,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 4735. [2021-07-09 18:19:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4735 states, 4734 states have (on average 2.511406844106464) internal successors, (11889), 4734 states have internal predecessors, (11889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:43,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 11889 transitions. [2021-07-09 18:19:43,597 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 11889 transitions. Word has length 32 [2021-07-09 18:19:43,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:43,597 INFO L482 AbstractCegarLoop]: Abstraction has 4735 states and 11889 transitions. [2021-07-09 18:19:43,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:43,598 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 11889 transitions. [2021-07-09 18:19:43,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:19:43,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:43,603 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:43,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-07-09 18:19:43,806 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:43,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:43,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1632455975, now seen corresponding path program 93 times [2021-07-09 18:19:43,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:43,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306404202] [2021-07-09 18:19:43,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:43,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:43,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:43,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306404202] [2021-07-09 18:19:43,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306404202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:43,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054935250] [2021-07-09 18:19:43,888 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:43,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:19:43,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:43,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:19:43,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:44,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054935250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:44,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:44,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:44,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417164031] [2021-07-09 18:19:44,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:44,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:44,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:44,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:44,115 INFO L87 Difference]: Start difference. First operand 4735 states and 11889 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:45,807 INFO L93 Difference]: Finished difference Result 7971 states and 19194 transitions. [2021-07-09 18:19:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-07-09 18:19:45,807 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:19:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:45,817 INFO L225 Difference]: With dead ends: 7971 [2021-07-09 18:19:45,818 INFO L226 Difference]: Without dead ends: 7867 [2021-07-09 18:19:45,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 1554.8ms TimeCoverageRelationStatistics Valid=1727, Invalid=5929, Unknown=0, NotChecked=0, Total=7656 [2021-07-09 18:19:45,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2021-07-09 18:19:45,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 5211. [2021-07-09 18:19:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5211 states, 5210 states have (on average 2.5299424184261037) internal successors, (13181), 5210 states have internal predecessors, (13181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5211 states to 5211 states and 13181 transitions. [2021-07-09 18:19:45,905 INFO L78 Accepts]: Start accepts. Automaton has 5211 states and 13181 transitions. Word has length 32 [2021-07-09 18:19:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:45,905 INFO L482 AbstractCegarLoop]: Abstraction has 5211 states and 13181 transitions. [2021-07-09 18:19:45,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 5211 states and 13181 transitions. [2021-07-09 18:19:45,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:19:45,911 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:45,911 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:46,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:46,127 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:46,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:46,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1308512999, now seen corresponding path program 94 times [2021-07-09 18:19:46,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:46,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891196392] [2021-07-09 18:19:46,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:46,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:46,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891196392] [2021-07-09 18:19:46,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891196392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:46,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669405656] [2021-07-09 18:19:46,222 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:46,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:46,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:46,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:19:46,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:46,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669405656] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:46,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:46,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-09 18:19:46,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266168731] [2021-07-09 18:19:46,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:19:46,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:46,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:19:46,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:19:46,460 INFO L87 Difference]: Start difference. First operand 5211 states and 13181 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:47,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:47,941 INFO L93 Difference]: Finished difference Result 9415 states and 23381 transitions. [2021-07-09 18:19:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 18:19:47,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:19:47,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:47,955 INFO L225 Difference]: With dead ends: 9415 [2021-07-09 18:19:47,955 INFO L226 Difference]: Without dead ends: 9411 [2021-07-09 18:19:47,955 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1275.6ms TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-07-09 18:19:47,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9411 states. [2021-07-09 18:19:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9411 to 6840. [2021-07-09 18:19:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 2.5451089340546864) internal successors, (17406), 6839 states have internal predecessors, (17406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:48,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 17406 transitions. [2021-07-09 18:19:48,076 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 17406 transitions. Word has length 32 [2021-07-09 18:19:48,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:48,077 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 17406 transitions. [2021-07-09 18:19:48,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:48,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 17406 transitions. [2021-07-09 18:19:48,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:19:48,085 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:48,085 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:48,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:48,299 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:48,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:48,299 INFO L82 PathProgramCache]: Analyzing trace with hash 976834211, now seen corresponding path program 95 times [2021-07-09 18:19:48,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:48,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83748163] [2021-07-09 18:19:48,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:48,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:48,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:48,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83748163] [2021-07-09 18:19:48,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83748163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:48,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024980372] [2021-07-09 18:19:48,360 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:48,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:19:48,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:48,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:19:48,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:48,580 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:48,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024980372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:48,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:48,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-09 18:19:48,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897207750] [2021-07-09 18:19:48,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:19:48,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:48,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:19:48,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:19:48,581 INFO L87 Difference]: Start difference. First operand 6840 states and 17406 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:49,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:49,703 INFO L93 Difference]: Finished difference Result 7287 states and 18264 transitions. [2021-07-09 18:19:49,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:19:49,703 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:19:49,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:49,713 INFO L225 Difference]: With dead ends: 7287 [2021-07-09 18:19:49,714 INFO L226 Difference]: Without dead ends: 7283 [2021-07-09 18:19:49,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 1028.7ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:19:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7283 states. [2021-07-09 18:19:49,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7283 to 6779. [2021-07-09 18:19:49,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6779 states, 6778 states have (on average 2.5457362053703156) internal successors, (17255), 6778 states have internal predecessors, (17255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:49,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 17255 transitions. [2021-07-09 18:19:49,853 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 17255 transitions. Word has length 32 [2021-07-09 18:19:49,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:49,853 INFO L482 AbstractCegarLoop]: Abstraction has 6779 states and 17255 transitions. [2021-07-09 18:19:49,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:49,853 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 17255 transitions. [2021-07-09 18:19:49,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:19:49,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:49,859 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:50,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-07-09 18:19:50,075 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:50,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:50,075 INFO L82 PathProgramCache]: Analyzing trace with hash 542563561, now seen corresponding path program 96 times [2021-07-09 18:19:50,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:50,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957757887] [2021-07-09 18:19:50,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:50,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:50,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:50,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957757887] [2021-07-09 18:19:50,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957757887] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:50,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143253174] [2021-07-09 18:19:50,123 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:50,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:19:50,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:50,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:19:50,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:50,324 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:50,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143253174] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:50,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:50,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-09 18:19:50,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220661005] [2021-07-09 18:19:50,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:19:50,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:50,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:19:50,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:19:50,325 INFO L87 Difference]: Start difference. First operand 6779 states and 17255 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:51,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:51,191 INFO L93 Difference]: Finished difference Result 8864 states and 22216 transitions. [2021-07-09 18:19:51,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 18:19:51,191 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:19:51,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:51,205 INFO L225 Difference]: With dead ends: 8864 [2021-07-09 18:19:51,206 INFO L226 Difference]: Without dead ends: 8852 [2021-07-09 18:19:51,206 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 718.3ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 18:19:51,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2021-07-09 18:19:51,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 7049. [2021-07-09 18:19:51,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7049 states, 7048 states have (on average 2.555192962542565) internal successors, (18009), 7048 states have internal predecessors, (18009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 18009 transitions. [2021-07-09 18:19:51,331 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 18009 transitions. Word has length 32 [2021-07-09 18:19:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:51,331 INFO L482 AbstractCegarLoop]: Abstraction has 7049 states and 18009 transitions. [2021-07-09 18:19:51,331 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:51,331 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 18009 transitions. [2021-07-09 18:19:51,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:19:51,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:51,337 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:51,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:51,552 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:51,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:51,553 INFO L82 PathProgramCache]: Analyzing trace with hash 987096583, now seen corresponding path program 97 times [2021-07-09 18:19:51,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:51,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878788876] [2021-07-09 18:19:51,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:51,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:51,605 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:51,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:51,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878788876] [2021-07-09 18:19:51,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878788876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:51,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554196158] [2021-07-09 18:19:51,605 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:51,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:51,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:19:51,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:51,848 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:51,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554196158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:51,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:51,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 18:19:51,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696707519] [2021-07-09 18:19:51,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:19:51,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:51,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:19:51,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:19:51,849 INFO L87 Difference]: Start difference. First operand 7049 states and 18009 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:53,023 INFO L93 Difference]: Finished difference Result 8195 states and 20473 transitions. [2021-07-09 18:19:53,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:19:53,023 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:19:53,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:53,037 INFO L225 Difference]: With dead ends: 8195 [2021-07-09 18:19:53,037 INFO L226 Difference]: Without dead ends: 8183 [2021-07-09 18:19:53,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 1066.1ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:19:53,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8183 states. [2021-07-09 18:19:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8183 to 7241. [2021-07-09 18:19:53,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7241 states, 7240 states have (on average 2.56353591160221) internal successors, (18560), 7240 states have internal predecessors, (18560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:53,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7241 states to 7241 states and 18560 transitions. [2021-07-09 18:19:53,154 INFO L78 Accepts]: Start accepts. Automaton has 7241 states and 18560 transitions. Word has length 32 [2021-07-09 18:19:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:53,154 INFO L482 AbstractCegarLoop]: Abstraction has 7241 states and 18560 transitions. [2021-07-09 18:19:53,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:53,155 INFO L276 IsEmpty]: Start isEmpty. Operand 7241 states and 18560 transitions. [2021-07-09 18:19:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:19:53,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:53,161 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:53,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:53,377 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1995895033, now seen corresponding path program 98 times [2021-07-09 18:19:53,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:53,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658174985] [2021-07-09 18:19:53,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:53,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:53,436 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:53,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:53,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658174985] [2021-07-09 18:19:53,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658174985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:53,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775979354] [2021-07-09 18:19:53,437 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:53,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:19:53,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:53,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:19:53,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:53,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775979354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:53,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:53,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 18:19:53,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482444492] [2021-07-09 18:19:53,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:19:53,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:53,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:19:53,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:19:53,640 INFO L87 Difference]: Start difference. First operand 7241 states and 18560 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:54,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:54,833 INFO L93 Difference]: Finished difference Result 8748 states and 21799 transitions. [2021-07-09 18:19:54,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-07-09 18:19:54,833 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:19:54,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:54,846 INFO L225 Difference]: With dead ends: 8748 [2021-07-09 18:19:54,846 INFO L226 Difference]: Without dead ends: 8722 [2021-07-09 18:19:54,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 1053.5ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:19:54,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2021-07-09 18:19:54,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 7346. [2021-07-09 18:19:54,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7346 states, 7345 states have (on average 2.5699115044247787) internal successors, (18876), 7345 states have internal predecessors, (18876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:54,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 18876 transitions. [2021-07-09 18:19:54,964 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 18876 transitions. Word has length 32 [2021-07-09 18:19:54,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:54,964 INFO L482 AbstractCegarLoop]: Abstraction has 7346 states and 18876 transitions. [2021-07-09 18:19:54,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 18876 transitions. [2021-07-09 18:19:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:19:54,971 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:54,971 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:55,187 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable582 [2021-07-09 18:19:55,188 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:55,188 INFO L82 PathProgramCache]: Analyzing trace with hash 387315719, now seen corresponding path program 99 times [2021-07-09 18:19:55,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:55,188 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239767886] [2021-07-09 18:19:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:55,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:55,256 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:55,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:55,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239767886] [2021-07-09 18:19:55,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239767886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:55,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756525020] [2021-07-09 18:19:55,256 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:55,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 18:19:55,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:55,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:19:55,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:55,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756525020] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:55,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:55,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:19:55,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6096604] [2021-07-09 18:19:55,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:19:55,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:55,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:19:55,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:19:55,482 INFO L87 Difference]: Start difference. First operand 7346 states and 18876 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:56,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:56,694 INFO L93 Difference]: Finished difference Result 9131 states and 22754 transitions. [2021-07-09 18:19:56,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-07-09 18:19:56,694 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:19:56,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:56,710 INFO L225 Difference]: With dead ends: 9131 [2021-07-09 18:19:56,711 INFO L226 Difference]: Without dead ends: 9101 [2021-07-09 18:19:56,711 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 1106.0ms TimeCoverageRelationStatistics Valid=1246, Invalid=4010, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:19:56,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9101 states. [2021-07-09 18:19:56,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9101 to 6682. [2021-07-09 18:19:56,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6682 states, 6681 states have (on average 2.5696751983236044) internal successors, (17168), 6681 states have internal predecessors, (17168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:56,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 17168 transitions. [2021-07-09 18:19:56,844 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 17168 transitions. Word has length 32 [2021-07-09 18:19:56,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:56,844 INFO L482 AbstractCegarLoop]: Abstraction has 6682 states and 17168 transitions. [2021-07-09 18:19:56,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:56,844 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 17168 transitions. [2021-07-09 18:19:56,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:19:56,850 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:56,850 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:57,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:57,067 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:57,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:57,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1126651079, now seen corresponding path program 100 times [2021-07-09 18:19:57,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:57,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743911294] [2021-07-09 18:19:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:57,149 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:57,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:57,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743911294] [2021-07-09 18:19:57,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743911294] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:57,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95399825] [2021-07-09 18:19:57,150 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:57,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:19:57,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:57,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:19:57,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:57,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95399825] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:57,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:57,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:19:57,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916872668] [2021-07-09 18:19:57,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:19:57,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:57,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:19:57,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:19:57,381 INFO L87 Difference]: Start difference. First operand 6682 states and 17168 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:58,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:19:58,689 INFO L93 Difference]: Finished difference Result 8276 states and 20409 transitions. [2021-07-09 18:19:58,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:19:58,689 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 32 [2021-07-09 18:19:58,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:19:58,702 INFO L225 Difference]: With dead ends: 8276 [2021-07-09 18:19:58,702 INFO L226 Difference]: Without dead ends: 8276 [2021-07-09 18:19:58,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 1115.2ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:19:58,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-07-09 18:19:58,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6034. [2021-07-09 18:19:58,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6034 states, 6033 states have (on average 2.554284767114205) internal successors, (15410), 6033 states have internal predecessors, (15410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 15410 transitions. [2021-07-09 18:19:58,796 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 15410 transitions. Word has length 32 [2021-07-09 18:19:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:19:58,796 INFO L482 AbstractCegarLoop]: Abstraction has 6034 states and 15410 transitions. [2021-07-09 18:19:58,796 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:19:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 15410 transitions. [2021-07-09 18:19:58,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:19:58,802 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:19:58,802 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:19:59,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-07-09 18:19:59,018 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:19:59,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:19:59,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1001568577, now seen corresponding path program 101 times [2021-07-09 18:19:59,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:19:59,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823495879] [2021-07-09 18:19:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:19:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:19:59,083 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:19:59,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:19:59,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823495879] [2021-07-09 18:19:59,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823495879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:59,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481457054] [2021-07-09 18:19:59,084 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:19:59,107 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 18:19:59,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:19:59,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:19:59,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:19:59,304 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:19:59,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481457054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:19:59,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:19:59,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:19:59,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790997793] [2021-07-09 18:19:59,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:19:59,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:19:59,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:19:59,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:19:59,305 INFO L87 Difference]: Start difference. First operand 6034 states and 15410 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:00,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:00,595 INFO L93 Difference]: Finished difference Result 7180 states and 17683 transitions. [2021-07-09 18:20:00,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-07-09 18:20:00,595 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:20:00,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:00,604 INFO L225 Difference]: With dead ends: 7180 [2021-07-09 18:20:00,605 INFO L226 Difference]: Without dead ends: 7114 [2021-07-09 18:20:00,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 1120.4ms TimeCoverageRelationStatistics Valid=1147, Invalid=4109, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:20:00,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2021-07-09 18:20:00,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 6028. [2021-07-09 18:20:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6028 states, 6027 states have (on average 2.553177368508379) internal successors, (15388), 6027 states have internal predecessors, (15388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:00,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 15388 transitions. [2021-07-09 18:20:00,696 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 15388 transitions. Word has length 32 [2021-07-09 18:20:00,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:00,696 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 15388 transitions. [2021-07-09 18:20:00,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:00,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 15388 transitions. [2021-07-09 18:20:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:20:00,701 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:00,701 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:00,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-07-09 18:20:00,917 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash -32333067, now seen corresponding path program 102 times [2021-07-09 18:20:00,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:00,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737525392] [2021-07-09 18:20:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:00,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:00,987 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:00,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:00,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737525392] [2021-07-09 18:20:00,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737525392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:00,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314164107] [2021-07-09 18:20:00,988 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:01,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:20:01,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:01,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:01,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:01,193 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:01,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314164107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:01,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:01,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:20:01,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725839779] [2021-07-09 18:20:01,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:20:01,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:01,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:20:01,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:20:01,194 INFO L87 Difference]: Start difference. First operand 6028 states and 15388 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:02,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:02,603 INFO L93 Difference]: Finished difference Result 8027 states and 19692 transitions. [2021-07-09 18:20:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 18:20:02,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:20:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:02,614 INFO L225 Difference]: With dead ends: 8027 [2021-07-09 18:20:02,614 INFO L226 Difference]: Without dead ends: 8027 [2021-07-09 18:20:02,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 1184.9ms TimeCoverageRelationStatistics Valid=1499, Invalid=4051, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:20:02,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-07-09 18:20:02,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 5454. [2021-07-09 18:20:02,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.526865945351183) internal successors, (13779), 5453 states have internal predecessors, (13779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:02,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13779 transitions. [2021-07-09 18:20:02,699 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13779 transitions. Word has length 32 [2021-07-09 18:20:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:02,699 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13779 transitions. [2021-07-09 18:20:02,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13779 transitions. [2021-07-09 18:20:02,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:20:02,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:02,705 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:02,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-07-09 18:20:02,921 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:02,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:02,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1252561661, now seen corresponding path program 103 times [2021-07-09 18:20:02,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:02,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140341180] [2021-07-09 18:20:02,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:02,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:02,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:02,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140341180] [2021-07-09 18:20:02,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140341180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:02,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817145804] [2021-07-09 18:20:02,981 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:03,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:03,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:03,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817145804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:03,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:03,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 18:20:03,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393253929] [2021-07-09 18:20:03,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:20:03,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:03,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:20:03,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:20:03,198 INFO L87 Difference]: Start difference. First operand 5454 states and 13779 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:04,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:04,314 INFO L93 Difference]: Finished difference Result 6472 states and 15876 transitions. [2021-07-09 18:20:04,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:20:04,315 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:20:04,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:04,324 INFO L225 Difference]: With dead ends: 6472 [2021-07-09 18:20:04,324 INFO L226 Difference]: Without dead ends: 6433 [2021-07-09 18:20:04,325 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 975.0ms TimeCoverageRelationStatistics Valid=968, Invalid=3454, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:20:04,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-07-09 18:20:04,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 5454. [2021-07-09 18:20:04,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5454 states, 5453 states have (on average 2.5241151659636896) internal successors, (13764), 5453 states have internal predecessors, (13764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:04,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13764 transitions. [2021-07-09 18:20:04,400 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13764 transitions. Word has length 32 [2021-07-09 18:20:04,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:04,400 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13764 transitions. [2021-07-09 18:20:04,400 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13764 transitions. [2021-07-09 18:20:04,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:20:04,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:04,405 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:04,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-09 18:20:04,620 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:04,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:04,621 INFO L82 PathProgramCache]: Analyzing trace with hash -180243655, now seen corresponding path program 104 times [2021-07-09 18:20:04,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:04,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17528460] [2021-07-09 18:20:04,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:04,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:04,717 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:04,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:04,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17528460] [2021-07-09 18:20:04,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17528460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:04,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718078178] [2021-07-09 18:20:04,718 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:04,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:04,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:04,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:04,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:04,913 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:04,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718078178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:04,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:04,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 18:20:04,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089252692] [2021-07-09 18:20:04,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:20:04,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:04,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:20:04,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:20:04,914 INFO L87 Difference]: Start difference. First operand 5454 states and 13764 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:06,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:06,346 INFO L93 Difference]: Finished difference Result 8061 states and 19706 transitions. [2021-07-09 18:20:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:20:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) 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 32 [2021-07-09 18:20:06,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:06,358 INFO L225 Difference]: With dead ends: 8061 [2021-07-09 18:20:06,358 INFO L226 Difference]: Without dead ends: 8061 [2021-07-09 18:20:06,359 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 1271.2ms TimeCoverageRelationStatistics Valid=1768, Invalid=4552, Unknown=0, NotChecked=0, Total=6320 [2021-07-09 18:20:06,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-07-09 18:20:06,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 6057. [2021-07-09 18:20:06,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6057 states, 6056 states have (on average 2.5155217965653898) internal successors, (15234), 6056 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:06,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 15234 transitions. [2021-07-09 18:20:06,453 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 15234 transitions. Word has length 32 [2021-07-09 18:20:06,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:06,453 INFO L482 AbstractCegarLoop]: Abstraction has 6057 states and 15234 transitions. [2021-07-09 18:20:06,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:06,453 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 15234 transitions. [2021-07-09 18:20:06,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:20:06,458 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:06,458 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:06,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:06,665 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:06,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:06,665 INFO L82 PathProgramCache]: Analyzing trace with hash 729918393, now seen corresponding path program 105 times [2021-07-09 18:20:06,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:06,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006062475] [2021-07-09 18:20:06,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:06,738 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:06,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:06,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006062475] [2021-07-09 18:20:06,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006062475] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:06,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684437047] [2021-07-09 18:20:06,738 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:06,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 18:20:06,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:06,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:06,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684437047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:06,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:06,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 18:20:06,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977289247] [2021-07-09 18:20:06,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:20:06,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:06,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:20:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:20:06,986 INFO L87 Difference]: Start difference. First operand 6057 states and 15234 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:07,985 INFO L93 Difference]: Finished difference Result 6889 states and 16992 transitions. [2021-07-09 18:20:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:20:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:20:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:07,997 INFO L225 Difference]: With dead ends: 6889 [2021-07-09 18:20:07,997 INFO L226 Difference]: Without dead ends: 6871 [2021-07-09 18:20:07,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 905.9ms TimeCoverageRelationStatistics Valid=879, Invalid=3027, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:20:08,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-07-09 18:20:08,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 6077. [2021-07-09 18:20:08,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6077 states, 6076 states have (on average 2.517774851876234) internal successors, (15298), 6076 states have internal predecessors, (15298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:08,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 15298 transitions. [2021-07-09 18:20:08,087 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 15298 transitions. Word has length 32 [2021-07-09 18:20:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:08,087 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 15298 transitions. [2021-07-09 18:20:08,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:08,088 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 15298 transitions. [2021-07-09 18:20:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:20:08,093 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:08,093 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:08,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:08,309 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:08,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:08,310 INFO L82 PathProgramCache]: Analyzing trace with hash -853693707, now seen corresponding path program 106 times [2021-07-09 18:20:08,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:08,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029863683] [2021-07-09 18:20:08,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:08,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:08,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:08,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029863683] [2021-07-09 18:20:08,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029863683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:08,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923383447] [2021-07-09 18:20:08,366 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:08,386 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:08,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:08,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:08,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:08,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:08,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923383447] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:08,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:08,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 18:20:08,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971099973] [2021-07-09 18:20:08,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:20:08,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:08,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:20:08,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:20:08,558 INFO L87 Difference]: Start difference. First operand 6077 states and 15298 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:10,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:10,082 INFO L93 Difference]: Finished difference Result 10330 states and 25935 transitions. [2021-07-09 18:20:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-07-09 18:20:10,082 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:20:10,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:10,100 INFO L225 Difference]: With dead ends: 10330 [2021-07-09 18:20:10,100 INFO L226 Difference]: Without dead ends: 10330 [2021-07-09 18:20:10,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 1316.2ms TimeCoverageRelationStatistics Valid=2010, Invalid=4962, Unknown=0, NotChecked=0, Total=6972 [2021-07-09 18:20:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10330 states. [2021-07-09 18:20:10,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10330 to 9091. [2021-07-09 18:20:10,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9091 states, 9090 states have (on average 2.5674367436743672) internal successors, (23338), 9090 states have internal predecessors, (23338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:10,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9091 states to 9091 states and 23338 transitions. [2021-07-09 18:20:10,270 INFO L78 Accepts]: Start accepts. Automaton has 9091 states and 23338 transitions. Word has length 32 [2021-07-09 18:20:10,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:10,270 INFO L482 AbstractCegarLoop]: Abstraction has 9091 states and 23338 transitions. [2021-07-09 18:20:10,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:10,270 INFO L276 IsEmpty]: Start isEmpty. Operand 9091 states and 23338 transitions. [2021-07-09 18:20:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:20:10,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:10,280 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:10,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-07-09 18:20:10,493 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:10,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:10,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1689192365, now seen corresponding path program 107 times [2021-07-09 18:20:10,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:10,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845962350] [2021-07-09 18:20:10,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:10,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:10,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:10,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845962350] [2021-07-09 18:20:10,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845962350] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:10,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3233694] [2021-07-09 18:20:10,541 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:10,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:20:10,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:10,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:10,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:10,758 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:10,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3233694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:10,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:10,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-07-09 18:20:10,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941271819] [2021-07-09 18:20:10,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 18:20:10,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:10,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 18:20:10,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-07-09 18:20:10,760 INFO L87 Difference]: Start difference. First operand 9091 states and 23338 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:11,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:11,739 INFO L93 Difference]: Finished difference Result 10140 states and 25474 transitions. [2021-07-09 18:20:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:20:11,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:20:11,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:11,754 INFO L225 Difference]: With dead ends: 10140 [2021-07-09 18:20:11,754 INFO L226 Difference]: Without dead ends: 10136 [2021-07-09 18:20:11,755 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 832.1ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:20:11,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-07-09 18:20:11,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8995. [2021-07-09 18:20:11,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8995 states, 8994 states have (on average 2.5654881031798977) internal successors, (23074), 8994 states have internal predecessors, (23074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:11,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8995 states to 8995 states and 23074 transitions. [2021-07-09 18:20:11,909 INFO L78 Accepts]: Start accepts. Automaton has 8995 states and 23074 transitions. Word has length 32 [2021-07-09 18:20:11,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:11,910 INFO L482 AbstractCegarLoop]: Abstraction has 8995 states and 23074 transitions. [2021-07-09 18:20:11,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:11,910 INFO L276 IsEmpty]: Start isEmpty. Operand 8995 states and 23074 transitions. [2021-07-09 18:20:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:20:11,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:11,918 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:12,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:12,129 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:12,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:12,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1182846099, now seen corresponding path program 108 times [2021-07-09 18:20:12,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:12,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680945399] [2021-07-09 18:20:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:12,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:12,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680945399] [2021-07-09 18:20:12,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680945399] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:12,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743335012] [2021-07-09 18:20:12,183 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:12,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:20:12,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:12,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:12,377 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:12,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743335012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:12,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:12,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-07-09 18:20:12,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164932868] [2021-07-09 18:20:12,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 18:20:12,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:12,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 18:20:12,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-07-09 18:20:12,378 INFO L87 Difference]: Start difference. First operand 8995 states and 23074 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:13,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:13,195 INFO L93 Difference]: Finished difference Result 10548 states and 26516 transitions. [2021-07-09 18:20:13,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:20:13,195 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:20:13,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:13,212 INFO L225 Difference]: With dead ends: 10548 [2021-07-09 18:20:13,212 INFO L226 Difference]: Without dead ends: 10536 [2021-07-09 18:20:13,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 694.5ms TimeCoverageRelationStatistics Valid=1011, Invalid=2895, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:20:13,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10536 states. [2021-07-09 18:20:13,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10536 to 9183. [2021-07-09 18:20:13,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9183 states, 9182 states have (on average 2.5686125027227185) internal successors, (23585), 9182 states have internal predecessors, (23585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:13,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9183 states to 9183 states and 23585 transitions. [2021-07-09 18:20:13,377 INFO L78 Accepts]: Start accepts. Automaton has 9183 states and 23585 transitions. Word has length 32 [2021-07-09 18:20:13,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:13,377 INFO L482 AbstractCegarLoop]: Abstraction has 9183 states and 23585 transitions. [2021-07-09 18:20:13,377 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:13,377 INFO L276 IsEmpty]: Start isEmpty. Operand 9183 states and 23585 transitions. [2021-07-09 18:20:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:20:13,386 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:13,386 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:13,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:13,602 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:13,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash 955624719, now seen corresponding path program 109 times [2021-07-09 18:20:13,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:13,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552783255] [2021-07-09 18:20:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:13,670 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:13,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:13,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552783255] [2021-07-09 18:20:13,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552783255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:13,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496258028] [2021-07-09 18:20:13,671 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:13,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:13,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:13,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496258028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:13,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:13,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-07-09 18:20:13,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515109983] [2021-07-09 18:20:13,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 18:20:13,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:13,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 18:20:13,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-07-09 18:20:13,890 INFO L87 Difference]: Start difference. First operand 9183 states and 23585 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:14,838 INFO L93 Difference]: Finished difference Result 11364 states and 28535 transitions. [2021-07-09 18:20:14,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-09 18:20:14,838 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:20:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:14,858 INFO L225 Difference]: With dead ends: 11364 [2021-07-09 18:20:14,858 INFO L226 Difference]: Without dead ends: 11344 [2021-07-09 18:20:14,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 855.4ms TimeCoverageRelationStatistics Valid=1025, Invalid=3135, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:20:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11344 states. [2021-07-09 18:20:15,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11344 to 10146. [2021-07-09 18:20:15,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10146 states, 10145 states have (on average 2.574075899457861) internal successors, (26114), 10145 states have internal predecessors, (26114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:15,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 26114 transitions. [2021-07-09 18:20:15,095 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 26114 transitions. Word has length 32 [2021-07-09 18:20:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:15,095 INFO L482 AbstractCegarLoop]: Abstraction has 10146 states and 26114 transitions. [2021-07-09 18:20:15,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:15,096 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 26114 transitions. [2021-07-09 18:20:15,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:20:15,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:15,105 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:15,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:15,311 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:15,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:15,312 INFO L82 PathProgramCache]: Analyzing trace with hash 1639210635, now seen corresponding path program 110 times [2021-07-09 18:20:15,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:15,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537709735] [2021-07-09 18:20:15,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:15,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:15,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:15,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537709735] [2021-07-09 18:20:15,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537709735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:15,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96933468] [2021-07-09 18:20:15,405 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:15,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:15,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:15,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:15,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:15,606 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:15,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96933468] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:15,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:15,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-07-09 18:20:15,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499569182] [2021-07-09 18:20:15,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 18:20:15,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:15,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 18:20:15,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-07-09 18:20:15,607 INFO L87 Difference]: Start difference. First operand 10146 states and 26114 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:16,668 INFO L93 Difference]: Finished difference Result 12734 states and 32033 transitions. [2021-07-09 18:20:16,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:20:16,668 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:20:16,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:16,688 INFO L225 Difference]: With dead ends: 12734 [2021-07-09 18:20:16,688 INFO L226 Difference]: Without dead ends: 12706 [2021-07-09 18:20:16,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 967.4ms TimeCoverageRelationStatistics Valid=1128, Invalid=3564, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 18:20:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12706 states. [2021-07-09 18:20:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12706 to 11409. [2021-07-09 18:20:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11409 states, 11408 states have (on average 2.579330294530154) internal successors, (29425), 11408 states have internal predecessors, (29425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:16,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 29425 transitions. [2021-07-09 18:20:16,933 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 29425 transitions. Word has length 32 [2021-07-09 18:20:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:16,934 INFO L482 AbstractCegarLoop]: Abstraction has 11409 states and 29425 transitions. [2021-07-09 18:20:16,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 29425 transitions. [2021-07-09 18:20:16,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 18:20:16,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:16,945 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:17,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-07-09 18:20:17,161 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:17,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:17,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1435279623, now seen corresponding path program 111 times [2021-07-09 18:20:17,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:17,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920958531] [2021-07-09 18:20:17,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:17,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:17,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:17,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920958531] [2021-07-09 18:20:17,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920958531] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:17,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783389552] [2021-07-09 18:20:17,237 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:17,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 18:20:17,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 18:20:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:17,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783389552] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:17,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:17,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-07-09 18:20:17,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170374882] [2021-07-09 18:20:17,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:20:17,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:17,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:20:17,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:20:17,451 INFO L87 Difference]: Start difference. First operand 11409 states and 29425 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:18,605 INFO L93 Difference]: Finished difference Result 12970 states and 32809 transitions. [2021-07-09 18:20:18,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:20:18,606 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 18:20:18,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:18,627 INFO L225 Difference]: With dead ends: 12970 [2021-07-09 18:20:18,627 INFO L226 Difference]: Without dead ends: 12934 [2021-07-09 18:20:18,628 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 1056.1ms TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:20:18,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12934 states. [2021-07-09 18:20:18,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12934 to 11759. [2021-07-09 18:20:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 2.5852185745875147) internal successors, (30397), 11758 states have internal predecessors, (30397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30397 transitions. [2021-07-09 18:20:18,936 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30397 transitions. Word has length 32 [2021-07-09 18:20:18,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:18,936 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30397 transitions. [2021-07-09 18:20:18,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:18,936 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30397 transitions. [2021-07-09 18:20:18,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:20:18,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:18,946 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:19,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-07-09 18:20:19,162 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:19,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:19,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1812733093, now seen corresponding path program 112 times [2021-07-09 18:20:19,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:19,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004306570] [2021-07-09 18:20:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:19,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:19,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:19,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004306570] [2021-07-09 18:20:19,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004306570] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:19,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151731913] [2021-07-09 18:20:19,482 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:19,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:19,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:19,508 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:20:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:19,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,910 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:19,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,912 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:19,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,915 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:19,916 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:19,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:19,917 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:19,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-09 18:20:19,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:19,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:19,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:19,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-09 18:20:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:19,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151731913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:19,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:19,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-07-09 18:20:19,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571827360] [2021-07-09 18:20:19,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:20:19,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:19,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:20:19,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:19,943 INFO L87 Difference]: Start difference. First operand 11759 states and 30397 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:22,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:22,532 INFO L93 Difference]: Finished difference Result 14875 states and 37756 transitions. [2021-07-09 18:20:22,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:20:22,533 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:20:22,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:22,559 INFO L225 Difference]: With dead ends: 14875 [2021-07-09 18:20:22,559 INFO L226 Difference]: Without dead ends: 14868 [2021-07-09 18:20:22,560 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 2301.8ms TimeCoverageRelationStatistics Valid=616, Invalid=3674, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:20:22,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14868 states. [2021-07-09 18:20:22,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14868 to 11941. [2021-07-09 18:20:22,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11941 states, 11940 states have (on average 2.5852596314907874) internal successors, (30868), 11940 states have internal predecessors, (30868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:22,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 30868 transitions. [2021-07-09 18:20:22,755 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 30868 transitions. Word has length 34 [2021-07-09 18:20:22,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:22,755 INFO L482 AbstractCegarLoop]: Abstraction has 11941 states and 30868 transitions. [2021-07-09 18:20:22,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 30868 transitions. [2021-07-09 18:20:22,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:20:22,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:22,766 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:22,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-07-09 18:20:22,983 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:22,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:22,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1087321293, now seen corresponding path program 113 times [2021-07-09 18:20:22,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:22,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613651374] [2021-07-09 18:20:22,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:22,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:23,322 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:23,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:23,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613651374] [2021-07-09 18:20:23,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613651374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:23,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396627427] [2021-07-09 18:20:23,323 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:23,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:20:23,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:23,356 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:20:23,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:23,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:23,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,746 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:23,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:23,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:23,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:23,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:23,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-09 18:20:23,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:23,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:23,758 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:23,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-09 18:20:23,779 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:23,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396627427] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:23,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:23,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-07-09 18:20:23,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225789661] [2021-07-09 18:20:23,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:20:23,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:23,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:20:23,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:23,780 INFO L87 Difference]: Start difference. First operand 11941 states and 30868 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:26,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:26,064 INFO L93 Difference]: Finished difference Result 14838 states and 37704 transitions. [2021-07-09 18:20:26,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 18:20:26,064 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:20:26,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:26,090 INFO L225 Difference]: With dead ends: 14838 [2021-07-09 18:20:26,090 INFO L226 Difference]: Without dead ends: 14775 [2021-07-09 18:20:26,090 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 2033.7ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-07-09 18:20:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2021-07-09 18:20:26,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 11996. [2021-07-09 18:20:26,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11996 states, 11995 states have (on average 2.5838265944143393) internal successors, (30993), 11995 states have internal predecessors, (30993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:26,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 30993 transitions. [2021-07-09 18:20:26,291 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 30993 transitions. Word has length 34 [2021-07-09 18:20:26,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:26,291 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 30993 transitions. [2021-07-09 18:20:26,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:26,292 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 30993 transitions. [2021-07-09 18:20:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:20:26,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:26,303 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:26,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable597,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:26,519 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:26,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:26,520 INFO L82 PathProgramCache]: Analyzing trace with hash -44039697, now seen corresponding path program 114 times [2021-07-09 18:20:26,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:26,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572745748] [2021-07-09 18:20:26,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:26,978 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:26,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:26,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572745748] [2021-07-09 18:20:26,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572745748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:26,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174656053] [2021-07-09 18:20:26,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:27,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:20:27,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:27,005 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:20:27,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:27,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:27,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:27,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:27,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:27,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:27,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:27,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:27,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:27,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:27,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:27,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:27,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:27,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:27,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:27,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-07-09 18:20:27,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:20:27,912 INFO L628 ElimStorePlain]: treesize reduction 178, result has 16.4 percent of original size [2021-07-09 18:20:27,916 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:20:27,916 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:22 [2021-07-09 18:20:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:27,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174656053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:27,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:27,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-07-09 18:20:27,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043861972] [2021-07-09 18:20:27,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 18:20:27,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:27,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 18:20:27,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 18:20:27,981 INFO L87 Difference]: Start difference. First operand 11996 states and 30993 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:30,315 INFO L93 Difference]: Finished difference Result 15015 states and 38117 transitions. [2021-07-09 18:20:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:20:30,316 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:20:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:30,382 INFO L225 Difference]: With dead ends: 15015 [2021-07-09 18:20:30,383 INFO L226 Difference]: Without dead ends: 14957 [2021-07-09 18:20:30,383 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2514.8ms TimeCoverageRelationStatistics Valid=580, Invalid=3452, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 18:20:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14957 states. [2021-07-09 18:20:30,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14957 to 12104. [2021-07-09 18:20:30,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12104 states, 12103 states have (on average 2.5794431132776996) internal successors, (31219), 12103 states have internal predecessors, (31219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:30,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31219 transitions. [2021-07-09 18:20:30,579 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31219 transitions. Word has length 34 [2021-07-09 18:20:30,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:30,579 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 31219 transitions. [2021-07-09 18:20:30,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:30,579 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31219 transitions. [2021-07-09 18:20:30,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:20:30,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:30,591 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:30,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-09 18:20:30,793 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:30,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1445312427, now seen corresponding path program 115 times [2021-07-09 18:20:30,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:30,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799406389] [2021-07-09 18:20:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:30,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:31,142 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:31,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:31,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799406389] [2021-07-09 18:20:31,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799406389] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:31,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92078618] [2021-07-09 18:20:31,142 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:31,166 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:20:31,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:31,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:31,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:31,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:31,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:31,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:31,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-09 18:20:31,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:31,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:31,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:31,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-09 18:20:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:31,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92078618] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:31,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:31,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-07-09 18:20:31,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42438420] [2021-07-09 18:20:31,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:20:31,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:31,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:20:31,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:31,571 INFO L87 Difference]: Start difference. First operand 12104 states and 31219 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:33,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:33,944 INFO L93 Difference]: Finished difference Result 15455 states and 39132 transitions. [2021-07-09 18:20:33,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 18:20:33,945 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:20:33,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:33,969 INFO L225 Difference]: With dead ends: 15455 [2021-07-09 18:20:33,969 INFO L226 Difference]: Without dead ends: 15407 [2021-07-09 18:20:33,970 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2233.9ms TimeCoverageRelationStatistics Valid=552, Invalid=3354, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 18:20:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15407 states. [2021-07-09 18:20:34,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15407 to 12292. [2021-07-09 18:20:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12292 states, 12291 states have (on average 2.5755430803026607) internal successors, (31656), 12291 states have internal predecessors, (31656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:34,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12292 states to 12292 states and 31656 transitions. [2021-07-09 18:20:34,186 INFO L78 Accepts]: Start accepts. Automaton has 12292 states and 31656 transitions. Word has length 34 [2021-07-09 18:20:34,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:34,186 INFO L482 AbstractCegarLoop]: Abstraction has 12292 states and 31656 transitions. [2021-07-09 18:20:34,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 12292 states and 31656 transitions. [2021-07-09 18:20:34,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:20:34,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:34,199 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:34,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:34,415 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:34,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:34,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1347182557, now seen corresponding path program 116 times [2021-07-09 18:20:34,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:34,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004886805] [2021-07-09 18:20:34,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:34,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:34,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:34,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004886805] [2021-07-09 18:20:34,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004886805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:34,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388422518] [2021-07-09 18:20:34,724 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:34,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:20:34,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:34,757 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:20:34,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:35,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:35,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:35,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:35,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,096 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:35,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:35,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:35,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-09 18:20:35,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:35,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:35,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:35,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-09 18:20:35,126 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:35,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388422518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:35,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:35,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-07-09 18:20:35,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940975882] [2021-07-09 18:20:35,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 18:20:35,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:35,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 18:20:35,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-07-09 18:20:35,127 INFO L87 Difference]: Start difference. First operand 12292 states and 31656 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:37,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:37,768 INFO L93 Difference]: Finished difference Result 16292 states and 41059 transitions. [2021-07-09 18:20:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:20:37,768 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:20:37,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:37,795 INFO L225 Difference]: With dead ends: 16292 [2021-07-09 18:20:37,796 INFO L226 Difference]: Without dead ends: 16283 [2021-07-09 18:20:37,796 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2353.9ms TimeCoverageRelationStatistics Valid=670, Invalid=4586, Unknown=0, NotChecked=0, Total=5256 [2021-07-09 18:20:37,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2021-07-09 18:20:37,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 12441. [2021-07-09 18:20:37,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12441 states, 12440 states have (on average 2.5761254019292603) internal successors, (32047), 12440 states have internal predecessors, (32047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12441 states to 12441 states and 32047 transitions. [2021-07-09 18:20:38,020 INFO L78 Accepts]: Start accepts. Automaton has 12441 states and 32047 transitions. Word has length 34 [2021-07-09 18:20:38,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:38,021 INFO L482 AbstractCegarLoop]: Abstraction has 12441 states and 32047 transitions. [2021-07-09 18:20:38,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:38,021 INFO L276 IsEmpty]: Start isEmpty. Operand 12441 states and 32047 transitions. [2021-07-09 18:20:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:20:38,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:38,032 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:38,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:38,245 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:38,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:38,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1755703351, now seen corresponding path program 117 times [2021-07-09 18:20:38,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:38,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076968701] [2021-07-09 18:20:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:38,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:20:38,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:38,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076968701] [2021-07-09 18:20:38,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076968701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:38,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872849714] [2021-07-09 18:20:38,500 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:38,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:20:38,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:38,526 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:20:38,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:39,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:39,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:39,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:39,633 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:39,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:39,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:39,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:39,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:39,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:39,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:39,707 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:39,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 85 treesize of output 171 [2021-07-09 18:20:40,389 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-07-09 18:20:40,509 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-07-09 18:20:40,868 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 300 [2021-07-09 18:20:41,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-07-09 18:20:41,291 INFO L628 ElimStorePlain]: treesize reduction 1674, result has 2.0 percent of original size [2021-07-09 18:20:41,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:20:41,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:22 [2021-07-09 18:20:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:41,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872849714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:41,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:41,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-07-09 18:20:41,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10946662] [2021-07-09 18:20:41,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-07-09 18:20:41,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:41,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-07-09 18:20:41,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-07-09 18:20:41,350 INFO L87 Difference]: Start difference. First operand 12441 states and 32047 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:48,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:48,244 INFO L93 Difference]: Finished difference Result 16489 states and 41364 transitions. [2021-07-09 18:20:48,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 18:20:48,245 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:20:48,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:48,273 INFO L225 Difference]: With dead ends: 16489 [2021-07-09 18:20:48,273 INFO L226 Difference]: Without dead ends: 16467 [2021-07-09 18:20:48,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 4112.3ms TimeCoverageRelationStatistics Valid=553, Invalid=4417, Unknown=0, NotChecked=0, Total=4970 [2021-07-09 18:20:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16467 states. [2021-07-09 18:20:48,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16467 to 12451. [2021-07-09 18:20:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.575421686746988) internal successors, (32064), 12450 states have internal predecessors, (32064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 32064 transitions. [2021-07-09 18:20:48,517 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 32064 transitions. Word has length 34 [2021-07-09 18:20:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:48,517 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 32064 transitions. [2021-07-09 18:20:48,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 32064 transitions. [2021-07-09 18:20:48,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:20:48,528 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:48,529 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:48,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-07-09 18:20:48,744 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:48,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:48,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1270909581, now seen corresponding path program 118 times [2021-07-09 18:20:48,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:48,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898408099] [2021-07-09 18:20:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:48,992 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:20:48,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:48,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898408099] [2021-07-09 18:20:48,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898408099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:48,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023949025] [2021-07-09 18:20:48,992 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:49,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:20:49,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:49,059 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:20:49,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:49,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:49,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:49,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:49,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:49,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:49,433 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:49,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-09 18:20:49,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:49,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:49,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-09 18:20:49,463 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:49,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023949025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:49,463 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:49,463 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-09 18:20:49,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656086259] [2021-07-09 18:20:49,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:20:49,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:49,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:20:49,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:20:49,464 INFO L87 Difference]: Start difference. First operand 12451 states and 32064 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-07-09 18:20:51,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:51,792 INFO L93 Difference]: Finished difference Result 16411 states and 41283 transitions. [2021-07-09 18:20:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:20:51,792 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 34 [2021-07-09 18:20:51,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:51,821 INFO L225 Difference]: With dead ends: 16411 [2021-07-09 18:20:51,821 INFO L226 Difference]: Without dead ends: 16378 [2021-07-09 18:20:51,821 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 2060.4ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-07-09 18:20:51,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states. [2021-07-09 18:20:52,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16378 to 12565. [2021-07-09 18:20:52,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12565 states, 12564 states have (on average 2.572110792741165) internal successors, (32316), 12564 states have internal predecessors, (32316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:52,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 32316 transitions. [2021-07-09 18:20:52,043 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 32316 transitions. Word has length 34 [2021-07-09 18:20:52,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:52,043 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 32316 transitions. [2021-07-09 18:20:52,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-07-09 18:20:52,043 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 32316 transitions. [2021-07-09 18:20:52,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:20:52,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:52,055 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:52,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable864,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:52,270 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:52,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:52,271 INFO L82 PathProgramCache]: Analyzing trace with hash 954034479, now seen corresponding path program 119 times [2021-07-09 18:20:52,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:52,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996625717] [2021-07-09 18:20:52,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:52,508 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 18:20:52,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:52,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996625717] [2021-07-09 18:20:52,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996625717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:52,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347613224] [2021-07-09 18:20:52,509 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:52,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 18:20:52,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:52,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:20:52,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:52,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:52,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:52,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:52,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:52,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:52,889 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:52,890 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-09 18:20:52,890 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:20:52,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:52,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:20:52,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-09 18:20:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:52,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347613224] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:52,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:52,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-09 18:20:52,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450899308] [2021-07-09 18:20:52,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:20:52,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:52,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:20:52,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:20:52,919 INFO L87 Difference]: Start difference. First operand 12565 states and 32316 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-07-09 18:20:55,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:20:55,823 INFO L93 Difference]: Finished difference Result 16814 states and 42191 transitions. [2021-07-09 18:20:55,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-07-09 18:20:55,824 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 34 [2021-07-09 18:20:55,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:20:55,852 INFO L225 Difference]: With dead ends: 16814 [2021-07-09 18:20:55,852 INFO L226 Difference]: Without dead ends: 16795 [2021-07-09 18:20:55,853 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2556.7ms TimeCoverageRelationStatistics Valid=709, Invalid=4841, Unknown=0, NotChecked=0, Total=5550 [2021-07-09 18:20:55,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-07-09 18:20:56,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 12569. [2021-07-09 18:20:56,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12569 states, 12568 states have (on average 2.5725652450668366) internal successors, (32332), 12568 states have internal predecessors, (32332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:20:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12569 states to 12569 states and 32332 transitions. [2021-07-09 18:20:56,196 INFO L78 Accepts]: Start accepts. Automaton has 12569 states and 32332 transitions. Word has length 34 [2021-07-09 18:20:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:20:56,197 INFO L482 AbstractCegarLoop]: Abstraction has 12569 states and 32332 transitions. [2021-07-09 18:20:56,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-07-09 18:20:56,197 INFO L276 IsEmpty]: Start isEmpty. Operand 12569 states and 32332 transitions. [2021-07-09 18:20:56,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:20:56,207 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:20:56,207 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:20:56,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:56,421 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:20:56,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:20:56,421 INFO L82 PathProgramCache]: Analyzing trace with hash -766181841, now seen corresponding path program 120 times [2021-07-09 18:20:56,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:20:56,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711393314] [2021-07-09 18:20:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:20:56,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:20:56,736 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 18:20:56,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:20:56,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711393314] [2021-07-09 18:20:56,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711393314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:56,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321096964] [2021-07-09 18:20:56,737 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:20:56,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 18:20:56,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:20:56,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:20:56,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:20:57,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:57,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:20:57,420 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:57,423 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:20:57,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:20:57,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-07-09 18:20:57,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-07-09 18:20:57,537 INFO L628 ElimStorePlain]: treesize reduction 220, result has 13.7 percent of original size [2021-07-09 18:20:57,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-07-09 18:20:57,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:16 [2021-07-09 18:20:57,603 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:20:57,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321096964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:20:57,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:20:57,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-07-09 18:20:57,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399974271] [2021-07-09 18:20:57,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:20:57,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:20:57,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:20:57,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:20:57,604 INFO L87 Difference]: Start difference. First operand 12569 states and 32332 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:00,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:00,336 INFO L93 Difference]: Finished difference Result 15950 states and 40250 transitions. [2021-07-09 18:21:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 18:21:00,337 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:21:00,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:00,363 INFO L225 Difference]: With dead ends: 15950 [2021-07-09 18:21:00,363 INFO L226 Difference]: Without dead ends: 15904 [2021-07-09 18:21:00,363 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2354.5ms TimeCoverageRelationStatistics Valid=615, Invalid=3675, Unknown=0, NotChecked=0, Total=4290 [2021-07-09 18:21:00,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15904 states. [2021-07-09 18:21:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15904 to 12573. [2021-07-09 18:21:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12573 states, 12572 states have (on average 2.5706331530384983) internal successors, (32318), 12572 states have internal predecessors, (32318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:00,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12573 states to 12573 states and 32318 transitions. [2021-07-09 18:21:00,572 INFO L78 Accepts]: Start accepts. Automaton has 12573 states and 32318 transitions. Word has length 34 [2021-07-09 18:21:00,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:00,572 INFO L482 AbstractCegarLoop]: Abstraction has 12573 states and 32318 transitions. [2021-07-09 18:21:00,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:00,572 INFO L276 IsEmpty]: Start isEmpty. Operand 12573 states and 32318 transitions. [2021-07-09 18:21:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:21:00,583 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:00,583 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:00,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-07-09 18:21:00,793 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:00,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:00,793 INFO L82 PathProgramCache]: Analyzing trace with hash -769209587, now seen corresponding path program 121 times [2021-07-09 18:21:00,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:00,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765929199] [2021-07-09 18:21:00,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:00,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:01,037 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:21:01,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:01,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765929199] [2021-07-09 18:21:01,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765929199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:01,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765927093] [2021-07-09 18:21:01,037 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:01,062 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:21:01,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:01,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,416 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:01,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:01,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,422 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:01,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,424 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:01,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:01,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:01,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-09 18:21:01,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:01,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:01,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:01,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-09 18:21:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:01,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765927093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:01,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:01,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-07-09 18:21:01,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085491549] [2021-07-09 18:21:01,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 18:21:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:01,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 18:21:01,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-07-09 18:21:01,454 INFO L87 Difference]: Start difference. First operand 12573 states and 32318 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:03,719 INFO L93 Difference]: Finished difference Result 13633 states and 34575 transitions. [2021-07-09 18:21:03,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 18:21:03,719 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:21:03,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:03,741 INFO L225 Difference]: With dead ends: 13633 [2021-07-09 18:21:03,741 INFO L226 Difference]: Without dead ends: 13606 [2021-07-09 18:21:03,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1985.4ms TimeCoverageRelationStatistics Valid=438, Invalid=3344, Unknown=0, NotChecked=0, Total=3782 [2021-07-09 18:21:03,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2021-07-09 18:21:03,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 12605. [2021-07-09 18:21:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12605 states, 12604 states have (on average 2.5693430656934306) internal successors, (32384), 12604 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12605 states to 12605 states and 32384 transitions. [2021-07-09 18:21:03,937 INFO L78 Accepts]: Start accepts. Automaton has 12605 states and 32384 transitions. Word has length 34 [2021-07-09 18:21:03,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:03,937 INFO L482 AbstractCegarLoop]: Abstraction has 12605 states and 32384 transitions. [2021-07-09 18:21:03,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:03,937 INFO L276 IsEmpty]: Start isEmpty. Operand 12605 states and 32384 transitions. [2021-07-09 18:21:03,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:21:03,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:03,949 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:04,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable878,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:04,166 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:04,166 INFO L82 PathProgramCache]: Analyzing trace with hash -915560657, now seen corresponding path program 122 times [2021-07-09 18:21:04,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:04,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206338655] [2021-07-09 18:21:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:04,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:21:04,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:04,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206338655] [2021-07-09 18:21:04,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206338655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:04,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288900630] [2021-07-09 18:21:04,436 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:04,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 18:21:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:04,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:21:04,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:04,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,832 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:04,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,838 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:04,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,840 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:04,841 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:04,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:04,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:04,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-09 18:21:04,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:04,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:04,851 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:04,851 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-09 18:21:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:04,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288900630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:04,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:04,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-09 18:21:04,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241109146] [2021-07-09 18:21:04,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:21:04,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:04,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:21:04,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:21:04,872 INFO L87 Difference]: Start difference. First operand 12605 states and 32384 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:07,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:07,054 INFO L93 Difference]: Finished difference Result 16746 states and 42145 transitions. [2021-07-09 18:21:07,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 18:21:07,054 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:21:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:07,082 INFO L225 Difference]: With dead ends: 16746 [2021-07-09 18:21:07,082 INFO L226 Difference]: Without dead ends: 16713 [2021-07-09 18:21:07,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 2034.7ms TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 18:21:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16713 states. [2021-07-09 18:21:07,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16713 to 12629. [2021-07-09 18:21:07,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5682610072853977) internal successors, (32432), 12628 states have internal predecessors, (32432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:07,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32432 transitions. [2021-07-09 18:21:07,300 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32432 transitions. Word has length 34 [2021-07-09 18:21:07,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:07,300 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32432 transitions. [2021-07-09 18:21:07,300 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:07,301 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32432 transitions. [2021-07-09 18:21:07,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:21:07,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:07,312 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:07,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:07,528 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:07,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:07,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1309383403, now seen corresponding path program 123 times [2021-07-09 18:21:07,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:07,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565392940] [2021-07-09 18:21:07,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:21:07,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:07,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565392940] [2021-07-09 18:21:07,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565392940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:07,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734681990] [2021-07-09 18:21:07,804 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:07,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 18:21:07,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:07,831 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 51 conjunts are in the unsatisfiable core [2021-07-09 18:21:07,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:08,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:08,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:08,396 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:08,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 16 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 97 treesize of output 247 [2021-07-09 18:21:09,121 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 210 DAG size of output: 167 [2021-07-09 18:21:09,190 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-07-09 18:21:09,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:09,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:09,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:122, output treesize:74 [2021-07-09 18:21:09,357 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:09,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734681990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:09,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:09,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-07-09 18:21:09,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237181691] [2021-07-09 18:21:09,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-07-09 18:21:09,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:09,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-07-09 18:21:09,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-07-09 18:21:09,358 INFO L87 Difference]: Start difference. First operand 12629 states and 32432 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:14,113 INFO L93 Difference]: Finished difference Result 16941 states and 42462 transitions. [2021-07-09 18:21:14,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-07-09 18:21:14,114 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:21:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:14,142 INFO L225 Difference]: With dead ends: 16941 [2021-07-09 18:21:14,142 INFO L226 Difference]: Without dead ends: 16910 [2021-07-09 18:21:14,143 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 4133.6ms TimeCoverageRelationStatistics Valid=1133, Invalid=9373, Unknown=0, NotChecked=0, Total=10506 [2021-07-09 18:21:14,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16910 states. [2021-07-09 18:21:14,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16910 to 12629. [2021-07-09 18:21:14,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12629 states, 12628 states have (on average 2.5688945201140325) internal successors, (32440), 12628 states have internal predecessors, (32440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32440 transitions. [2021-07-09 18:21:14,365 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32440 transitions. Word has length 34 [2021-07-09 18:21:14,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:14,365 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32440 transitions. [2021-07-09 18:21:14,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:14,365 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32440 transitions. [2021-07-09 18:21:14,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:21:14,377 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:14,377 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:14,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:14,589 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:14,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:14,589 INFO L82 PathProgramCache]: Analyzing trace with hash 92531981, now seen corresponding path program 124 times [2021-07-09 18:21:14,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:14,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662575764] [2021-07-09 18:21:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 18:21:14,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:14,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662575764] [2021-07-09 18:21:14,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662575764] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:14,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634938904] [2021-07-09 18:21:14,848 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:14,872 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 18:21:14,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:14,872 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:21:14,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:15,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:15,186 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:15,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:15,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,191 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:15,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:15,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:15,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-09 18:21:15,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:15,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:15,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:15,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-09 18:21:15,218 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:15,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634938904] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:15,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:15,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-07-09 18:21:15,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523781181] [2021-07-09 18:21:15,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 18:21:15,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:15,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 18:21:15,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-07-09 18:21:15,219 INFO L87 Difference]: Start difference. First operand 12629 states and 32440 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-07-09 18:21:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:17,665 INFO L93 Difference]: Finished difference Result 13890 states and 35182 transitions. [2021-07-09 18:21:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-07-09 18:21:17,665 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 34 [2021-07-09 18:21:17,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:17,692 INFO L225 Difference]: With dead ends: 13890 [2021-07-09 18:21:17,692 INFO L226 Difference]: Without dead ends: 13872 [2021-07-09 18:21:17,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 2123.8ms TimeCoverageRelationStatistics Valid=541, Invalid=3881, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 18:21:17,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13872 states. [2021-07-09 18:21:17,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13872 to 12614. [2021-07-09 18:21:17,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12614 states, 12613 states have (on average 2.568857527947356) internal successors, (32401), 12613 states have internal predecessors, (32401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:17,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 32401 transitions. [2021-07-09 18:21:17,914 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 32401 transitions. Word has length 34 [2021-07-09 18:21:17,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:17,914 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 32401 transitions. [2021-07-09 18:21:17,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-07-09 18:21:17,914 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 32401 transitions. [2021-07-09 18:21:17,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:21:17,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:17,927 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:18,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:18,141 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash -2032929557, now seen corresponding path program 125 times [2021-07-09 18:21:18,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:18,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919507699] [2021-07-09 18:21:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:18,376 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:18,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:18,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919507699] [2021-07-09 18:21:18,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919507699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:18,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698666640] [2021-07-09 18:21:18,377 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 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:18,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 18:21:18,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:18,405 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-07-09 18:21:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:18,663 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-07-09 18:21:18,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:18,863 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:18,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-07-09 18:21:18,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 18:21:18,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:18,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 18:21:18,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-07-09 18:21:18,889 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:18,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [698666640] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:18,890 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 18:21:18,890 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-07-09 18:21:18,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773729388] [2021-07-09 18:21:18,890 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-07-09 18:21:18,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 18:21:18,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-07-09 18:21:18,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-07-09 18:21:18,890 INFO L87 Difference]: Start difference. First operand 12614 states and 32401 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 18:21:20,086 INFO L93 Difference]: Finished difference Result 13122 states and 33247 transitions. [2021-07-09 18:21:20,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-07-09 18:21:20,087 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-07-09 18:21:20,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 18:21:20,108 INFO L225 Difference]: With dead ends: 13122 [2021-07-09 18:21:20,108 INFO L226 Difference]: Without dead ends: 13095 [2021-07-09 18:21:20,109 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1195.3ms TimeCoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 18:21:20,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-07-09 18:21:20,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 12617. [2021-07-09 18:21:20,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12617 states, 12616 states have (on average 2.565472415979708) internal successors, (32366), 12616 states have internal predecessors, (32366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:20,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 32366 transitions. [2021-07-09 18:21:20,326 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 32366 transitions. Word has length 34 [2021-07-09 18:21:20,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 18:21:20,326 INFO L482 AbstractCegarLoop]: Abstraction has 12617 states and 32366 transitions. [2021-07-09 18:21:20,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 18:21:20,326 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 32366 transitions. [2021-07-09 18:21:20,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-07-09 18:21:20,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 18:21:20,337 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 18:21:20,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable939,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:20,549 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 18:21:20,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 18:21:20,549 INFO L82 PathProgramCache]: Analyzing trace with hash 192014503, now seen corresponding path program 126 times [2021-07-09 18:21:20,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 18:21:20,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510935253] [2021-07-09 18:21:20,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 18:21:20,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 18:21:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 18:21:20,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 18:21:20,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510935253] [2021-07-09 18:21:20,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510935253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 18:21:20,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96440108] [2021-07-09 18:21:20,819 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 18:21:20,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 18:21:20,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 18:21:20,854 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-07-09 18:21:20,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 18:21:21,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:21,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:21,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:21,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:21,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:21,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:21,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:21,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:21,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-07-09 18:21:21,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 18:21:21,679 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-07-09 18:21:21,679 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 18:21:21,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 89 treesize of output 241 [2021-07-09 18:21:22,302 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 196 [2021-07-09 18:21:23,297 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 403 [2021-07-09 18:21:23,792 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-07-09 18:21:24,283 WARN L205 SmtUtils]: Spent 488.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-07-09 18:21:24,818 WARN L205 SmtUtils]: Spent 531.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 498 [2021-07-09 18:21:25,270 WARN L205 SmtUtils]: Spent 413.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 528 [2021-07-09 18:21:26,528 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 579 [2021-07-09 18:21:27,084 WARN L205 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 712 [2021-07-09 18:21:27,913 WARN L205 SmtUtils]: Spent 825.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 898 [2021-07-09 18:21:28,591 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 235 [2021-07-09 18:21:29,160 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 184 [2021-07-09 18:21:29,312 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 200 [2021-07-09 18:21:29,724 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 366 [2021-07-09 18:21:31,217 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-07-09 18:21:32,787 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-07-09 18:21:34,330 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 1240 DAG size of output: 1146 [2021-07-09 18:21:36,322 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 1148 DAG size of output: 1682 [2021-07-09 18:21:37,732 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 446 [2021-07-09 18:21:38,083 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 329 [2021-07-09 18:27:41,938 WARN L205 SmtUtils]: Spent 6.06 m on a formula simplification. DAG size of input: 2100 DAG size of output: 1623 [2021-07-09 18:28:12,168 WARN L205 SmtUtils]: Spent 30.22 s on a formula simplification. DAG size of input: 2100 DAG size of output: 1622 [2021-07-09 18:28:26,397 WARN L205 SmtUtils]: Spent 14.22 s on a formula simplification. DAG size of input: 2109 DAG size of output: 1630 [2021-07-09 18:28:26,788 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 105 [2021-07-09 18:28:35,238 WARN L205 SmtUtils]: Spent 8.44 s on a formula simplification. DAG size of input: 167 DAG size of output: 124 [2021-07-09 18:28:35,453 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 219 [2021-07-09 18:28:35,764 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 138 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown