/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 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 21:31:49,260 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 21:31:49,263 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 21:31:49,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 21:31:49,321 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-12 21:31:49,323 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-12 21:31:49,324 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-12 21:31:49,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-12 21:31:49,328 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-12 21:31:49,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-12 21:31:49,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-12 21:31:49,336 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-12 21:31:49,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-12 21:31:49,338 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-12 21:31:49,339 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-12 21:31:49,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-12 21:31:49,347 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-12 21:31:49,363 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 [2021-06-12 21:31:49,414 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 21:31:49,415 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 21:31:49,415 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 21:31:49,415 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 21:31:49,418 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 21:31:49,418 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 21:31:49,418 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 21:31:49,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 21:31:49,418 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 21:31:49,419 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 21:31:49,419 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 21:31:49,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 21:31:49,420 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 21:31:49,420 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 21:31:49,420 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 21:31:49,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 21:31:49,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 21:31:49,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 21:31:49,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 21:31:49,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 21:31:49,421 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 21:31:49,421 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 21:31:49,421 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 21:31:49,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 21:31:49,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 21:31:49,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 21:31:49,422 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 21:31:49,422 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 21:31:49,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 21:31:49,422 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 21:31:49,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 21:31:49,422 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 21:31:49,726 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 21:31:49,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 21:31:49,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 21:31:49,759 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 21:31:49,760 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 21:31:49,760 INFO L432 ainManager$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 [2021-06-12 21:31:49,761 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2021-06-12 21:31:49,785 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 21:31:49,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 21:31:49,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 21:31:49,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 21:31:49,788 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 21:31:49,803 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 12.06 09:31:49" (1/1) ... [2021-06-12 21:31:49,810 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 12.06 09:31:49" (1/1) ... [2021-06-12 21:31:49,817 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 21:31:49,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 21:31:49,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 21:31:49,819 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 21:31:49,826 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:49" (1/1) ... [2021-06-12 21:31:49,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:49" (1/1) ... [2021-06-12 21:31:49,827 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:49" (1/1) ... [2021-06-12 21:31:49,828 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:49" (1/1) ... [2021-06-12 21:31:49,831 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:49" (1/1) ... [2021-06-12 21:31:49,834 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:49" (1/1) ... [2021-06-12 21:31:49,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:49" (1/1) ... [2021-06-12 21:31:49,835 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 21:31:49,837 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 21:31:49,837 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 21:31:49,837 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 21:31:49,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:49" (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 [2021-06-12 21:31:49,913 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 21:31:49,913 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 21:31:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 21:31:49,914 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 21:31:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 21:31:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 21:31:49,914 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 21:31:49,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 21:31:49,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 21:31:49,915 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 21:31:50,071 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 21:31:50,071 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 21:31:50,073 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:31:50 BoogieIcfgContainer [2021-06-12 21:31:50,073 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 21:31:50,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 21:31:50,075 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 21:31:50,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 21:31:50,077 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 09:31:49" (1/2) ... [2021-06-12 21:31:50,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4876d17c and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 09:31:50, skipping insertion in model container [2021-06-12 21:31:50,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 09:31:50" (2/2) ... [2021-06-12 21:31:50,080 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2021-06-12 21:31:50,084 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 21:31:50,084 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 21:31:50,085 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 21:31:50,085 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 21:31:50,108 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 21:31:50,125 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 21:31:50,141 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 21:31:50,142 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 21:31:50,142 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 21:31:50,142 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 21:31:50,142 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 21:31:50,142 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 21:31:50,142 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 21:31:50,142 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 21:31:50,150 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-06-12 21:31:50,158 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-06-12 21:31:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-06-12 21:31:50,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 21:31:50,165 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:50,166 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:50,166 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:50,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:50,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1635099045, now seen corresponding path program 1 times [2021-06-12 21:31:50,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:50,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755566634] [2021-06-12 21:31:50,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:50,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:50,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755566634] [2021-06-12 21:31:50,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755566634] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:50,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:50,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 21:31:50,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133979823] [2021-06-12 21:31:50,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 21:31:50,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:50,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 21:31:50,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:50,331 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) 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) [2021-06-12 21:31:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:50,357 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2021-06-12 21:31:50,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 21:31:50,359 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 [2021-06-12 21:31:50,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:50,366 INFO L225 Difference]: With dead ends: 57 [2021-06-12 21:31:50,366 INFO L226 Difference]: Without dead ends: 50 [2021-06-12 21:31:50,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 21:31:50,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-06-12 21:31:50,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-06-12 21:31:50,406 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) [2021-06-12 21:31:50,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2021-06-12 21:31:50,408 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2021-06-12 21:31:50,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:50,408 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2021-06-12 21:31:50,409 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) [2021-06-12 21:31:50,409 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2021-06-12 21:31:50,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:31:50,410 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:50,410 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:50,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 21:31:50,410 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:50,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:50,411 INFO L82 PathProgramCache]: Analyzing trace with hash 2119693475, now seen corresponding path program 1 times [2021-06-12 21:31:50,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:50,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274583334] [2021-06-12 21:31:50,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:50,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:50,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274583334] [2021-06-12 21:31:50,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274583334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:50,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475979907] [2021-06-12 21:31:50,488 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 [2021-06-12 21:31:50,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:50,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 21:31:50,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:50,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475979907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:50,647 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:50,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-12 21:31:50,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717582706] [2021-06-12 21:31:50,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 21:31:50,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:50,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 21:31:50,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:31:50,650 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) [2021-06-12 21:31:50,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:50,807 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-06-12 21:31:50,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 21:31:50,808 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 [2021-06-12 21:31:50,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:50,813 INFO L225 Difference]: With dead ends: 68 [2021-06-12 21:31:50,813 INFO L226 Difference]: Without dead ends: 68 [2021-06-12 21:31:50,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:50,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-06-12 21:31:50,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-06-12 21:31:50,830 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) [2021-06-12 21:31:50,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-12 21:31:50,833 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2021-06-12 21:31:50,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:50,834 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-12 21:31:50,834 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) [2021-06-12 21:31:50,834 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-12 21:31:50,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:31:50,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:50,836 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:51,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-12 21:31:51,061 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:51,061 INFO L82 PathProgramCache]: Analyzing trace with hash 831812391, now seen corresponding path program 1 times [2021-06-12 21:31:51,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:51,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107183549] [2021-06-12 21:31:51,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:51,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:51,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107183549] [2021-06-12 21:31:51,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107183549] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:51,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:51,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 21:31:51,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242686349] [2021-06-12 21:31:51,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:31:51,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:51,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:31:51,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:31:51,122 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) [2021-06-12 21:31:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:51,191 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2021-06-12 21:31:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:31:51,193 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 [2021-06-12 21:31:51,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:51,210 INFO L225 Difference]: With dead ends: 71 [2021-06-12 21:31:51,214 INFO L226 Difference]: Without dead ends: 66 [2021-06-12 21:31:51,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:31:51,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-12 21:31:51,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2021-06-12 21:31:51,222 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) [2021-06-12 21:31:51,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2021-06-12 21:31:51,223 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2021-06-12 21:31:51,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:51,223 INFO L482 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2021-06-12 21:31:51,223 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) [2021-06-12 21:31:51,223 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2021-06-12 21:31:51,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:31:51,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:51,224 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:51,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-12 21:31:51,224 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:51,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:51,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1002480409, now seen corresponding path program 2 times [2021-06-12 21:31:51,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:51,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914414092] [2021-06-12 21:31:51,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:51,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:51,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:51,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914414092] [2021-06-12 21:31:51,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914414092] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:51,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:51,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 21:31:51,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696021065] [2021-06-12 21:31:51,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:31:51,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:51,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:31:51,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:31:51,301 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) [2021-06-12 21:31:51,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:51,354 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2021-06-12 21:31:51,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 21:31:51,355 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 [2021-06-12 21:31:51,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:51,357 INFO L225 Difference]: With dead ends: 51 [2021-06-12 21:31:51,357 INFO L226 Difference]: Without dead ends: 51 [2021-06-12 21:31:51,357 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:31:51,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-06-12 21:31:51,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-06-12 21:31:51,365 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) [2021-06-12 21:31:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2021-06-12 21:31:51,370 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2021-06-12 21:31:51,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:51,370 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2021-06-12 21:31:51,370 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) [2021-06-12 21:31:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2021-06-12 21:31:51,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-06-12 21:31:51,371 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:51,371 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:51,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 21:31:51,372 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:51,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:51,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1334159197, now seen corresponding path program 2 times [2021-06-12 21:31:51,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:51,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136044643] [2021-06-12 21:31:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:51,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:51,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:51,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136044643] [2021-06-12 21:31:51,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136044643] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 21:31:51,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 21:31:51,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-12 21:31:51,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54583259] [2021-06-12 21:31:51,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 21:31:51,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 21:31:51,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-12 21:31:51,428 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) [2021-06-12 21:31:51,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:51,488 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-06-12 21:31:51,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:31:51,489 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 [2021-06-12 21:31:51,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:51,490 INFO L225 Difference]: With dead ends: 51 [2021-06-12 21:31:51,490 INFO L226 Difference]: Without dead ends: 49 [2021-06-12 21:31:51,490 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.5ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 21:31:51,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-06-12 21:31:51,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-06-12 21:31:51,499 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) [2021-06-12 21:31:51,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-06-12 21:31:51,500 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-06-12 21:31:51,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:51,500 INFO L482 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-06-12 21:31:51,500 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) [2021-06-12 21:31:51,500 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-06-12 21:31:51,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:31:51,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:51,502 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:51,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 21:31:51,502 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:51,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1624375643, now seen corresponding path program 1 times [2021-06-12 21:31:51,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:51,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591910695] [2021-06-12 21:31:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:51,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:51,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:51,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591910695] [2021-06-12 21:31:51,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591910695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:51,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092284241] [2021-06-12 21:31:51,702 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 [2021-06-12 21:31:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:51,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:31:51,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:51,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:31:51,966 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 [2021-06-12 21:31:51,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:51,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:51,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:31:51,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-06-12 21:31:51,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:51,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092284241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:51,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:51,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:31:51,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913433810] [2021-06-12 21:31:51,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:31:51,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:51,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:31:51,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:31:51,998 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) [2021-06-12 21:31:52,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:52,080 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-06-12 21:31:52,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:31:52,081 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 [2021-06-12 21:31:52,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:52,082 INFO L225 Difference]: With dead ends: 86 [2021-06-12 21:31:52,082 INFO L226 Difference]: Without dead ends: 79 [2021-06-12 21:31:52,082 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:31:52,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-06-12 21:31:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-06-12 21:31:52,094 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) [2021-06-12 21:31:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-06-12 21:31:52,095 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2021-06-12 21:31:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:52,095 INFO L482 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-06-12 21:31:52,095 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) [2021-06-12 21:31:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-06-12 21:31:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-12 21:31:52,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:52,096 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:52,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:52,297 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:52,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1933122355, now seen corresponding path program 2 times [2021-06-12 21:31:52,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:52,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62927943] [2021-06-12 21:31:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:52,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:52,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62927943] [2021-06-12 21:31:52,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62927943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:52,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773285949] [2021-06-12 21:31:52,396 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 [2021-06-12 21:31:52,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:52,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:52,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:31:52,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:52,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:31:52,516 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 [2021-06-12 21:31:52,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:52,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:52,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:31:52,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-06-12 21:31:52,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:52,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773285949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:52,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:52,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 21:31:52,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518504622] [2021-06-12 21:31:52,577 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 21:31:52,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:52,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 21:31:52,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:31:52,578 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) [2021-06-12 21:31:52,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:52,626 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2021-06-12 21:31:52,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 21:31:52,626 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 [2021-06-12 21:31:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:52,627 INFO L225 Difference]: With dead ends: 94 [2021-06-12 21:31:52,627 INFO L226 Difference]: Without dead ends: 87 [2021-06-12 21:31:52,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 21:31:52,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-06-12 21:31:52,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-06-12 21:31:52,634 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) [2021-06-12 21:31:52,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-06-12 21:31:52,635 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2021-06-12 21:31:52,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:52,636 INFO L482 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-06-12 21:31:52,636 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) [2021-06-12 21:31:52,636 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-06-12 21:31:52,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:52,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:52,637 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:52,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:52,854 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:52,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:52,854 INFO L82 PathProgramCache]: Analyzing trace with hash 210936483, now seen corresponding path program 3 times [2021-06-12 21:31:52,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:52,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418265992] [2021-06-12 21:31:52,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:52,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:52,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:52,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418265992] [2021-06-12 21:31:52,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418265992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:52,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141609438] [2021-06-12 21:31:52,936 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 [2021-06-12 21:31:52,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:31:52,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:52,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:31:52,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:53,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:53,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141609438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:53,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:53,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-12 21:31:53,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181509499] [2021-06-12 21:31:53,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 21:31:53,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:53,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 21:31:53,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:53,082 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) [2021-06-12 21:31:53,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:53,381 INFO L93 Difference]: Finished difference Result 176 states and 326 transitions. [2021-06-12 21:31:53,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:31:53,382 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 [2021-06-12 21:31:53,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:53,383 INFO L225 Difference]: With dead ends: 176 [2021-06-12 21:31:53,383 INFO L226 Difference]: Without dead ends: 176 [2021-06-12 21:31:53,384 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 268.3ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:31:53,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-12 21:31:53,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 73. [2021-06-12 21:31:53,393 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) [2021-06-12 21:31:53,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-06-12 21:31:53,393 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2021-06-12 21:31:53,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:53,393 INFO L482 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-06-12 21:31:53,393 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) [2021-06-12 21:31:53,393 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-06-12 21:31:53,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:53,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:53,397 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:53,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:53,620 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:53,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:53,621 INFO L82 PathProgramCache]: Analyzing trace with hash -492203993, now seen corresponding path program 4 times [2021-06-12 21:31:53,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:53,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196407484] [2021-06-12 21:31:53,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:53,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:53,673 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:53,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:53,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196407484] [2021-06-12 21:31:53,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196407484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:53,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620432784] [2021-06-12 21:31:53,674 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 [2021-06-12 21:31:53,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:53,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:53,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:31:53,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:53,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620432784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:53,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:53,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:31:53,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176823776] [2021-06-12 21:31:53,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:31:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:31:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:53,836 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) [2021-06-12 21:31:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:54,162 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2021-06-12 21:31:54,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 21:31:54,163 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 [2021-06-12 21:31:54,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:54,164 INFO L225 Difference]: With dead ends: 219 [2021-06-12 21:31:54,164 INFO L226 Difference]: Without dead ends: 205 [2021-06-12 21:31:54,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:31:54,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-06-12 21:31:54,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2021-06-12 21:31:54,169 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) [2021-06-12 21:31:54,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-06-12 21:31:54,170 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2021-06-12 21:31:54,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:54,172 INFO L482 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-06-12 21:31:54,172 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) [2021-06-12 21:31:54,172 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-06-12 21:31:54,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:54,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:54,174 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:54,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:54,393 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash 97165543, now seen corresponding path program 5 times [2021-06-12 21:31:54,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:54,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134021495] [2021-06-12 21:31:54,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:54,439 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:54,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:54,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134021495] [2021-06-12 21:31:54,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134021495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:54,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938812163] [2021-06-12 21:31:54,440 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:54,463 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:31:54,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:54,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:31:54,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:54,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938812163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:54,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:54,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 21:31:54,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665816100] [2021-06-12 21:31:54,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:31:54,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:54,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:31:54,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:54,580 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) [2021-06-12 21:31:54,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:54,859 INFO L93 Difference]: Finished difference Result 208 states and 404 transitions. [2021-06-12 21:31:54,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:31:54,860 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 [2021-06-12 21:31:54,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:54,861 INFO L225 Difference]: With dead ends: 208 [2021-06-12 21:31:54,861 INFO L226 Difference]: Without dead ends: 208 [2021-06-12 21:31:54,861 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 247.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:31:54,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-12 21:31:54,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-06-12 21:31:54,866 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) [2021-06-12 21:31:54,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2021-06-12 21:31:54,866 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2021-06-12 21:31:54,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:54,867 INFO L482 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2021-06-12 21:31:54,867 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) [2021-06-12 21:31:54,867 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2021-06-12 21:31:54,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:54,867 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:54,867 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:55,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:55,081 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:55,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:55,081 INFO L82 PathProgramCache]: Analyzing trace with hash -234513245, now seen corresponding path program 6 times [2021-06-12 21:31:55,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:55,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380010219] [2021-06-12 21:31:55,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:55,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:55,124 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:55,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:55,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380010219] [2021-06-12 21:31:55,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380010219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:55,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429871203] [2021-06-12 21:31:55,125 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:31:55,162 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:31:55,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:55,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:31:55,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:55,257 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:55,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429871203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:55,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:55,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 21:31:55,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48609829] [2021-06-12 21:31:55,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:31:55,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:55,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:31:55,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:55,259 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) [2021-06-12 21:31:55,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:55,533 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2021-06-12 21:31:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:31:55,534 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 [2021-06-12 21:31:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:55,535 INFO L225 Difference]: With dead ends: 205 [2021-06-12 21:31:55,535 INFO L226 Difference]: Without dead ends: 203 [2021-06-12 21:31:55,535 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 241.1ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:31:55,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-06-12 21:31:55,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2021-06-12 21:31:55,541 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) [2021-06-12 21:31:55,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-06-12 21:31:55,542 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2021-06-12 21:31:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:55,542 INFO L482 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-06-12 21:31:55,542 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) [2021-06-12 21:31:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-06-12 21:31:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:55,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:55,543 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:55,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:55,757 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:55,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:55,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2122602315, now seen corresponding path program 7 times [2021-06-12 21:31:55,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:55,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177829587] [2021-06-12 21:31:55,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:55,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:55,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:55,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177829587] [2021-06-12 21:31:55,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177829587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:55,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262378840] [2021-06-12 21:31:55,808 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 [2021-06-12 21:31:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:55,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:31:55,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:55,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:55,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262378840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:55,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:55,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:31:55,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413602692] [2021-06-12 21:31:55,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:31:55,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:31:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:55,937 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) [2021-06-12 21:31:56,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:56,247 INFO L93 Difference]: Finished difference Result 300 states and 609 transitions. [2021-06-12 21:31:56,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:31:56,247 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 [2021-06-12 21:31:56,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:56,249 INFO L225 Difference]: With dead ends: 300 [2021-06-12 21:31:56,249 INFO L226 Difference]: Without dead ends: 300 [2021-06-12 21:31:56,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 278.0ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:31:56,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-12 21:31:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 165. [2021-06-12 21:31:56,258 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) [2021-06-12 21:31:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2021-06-12 21:31:56,259 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2021-06-12 21:31:56,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:56,260 INFO L482 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2021-06-12 21:31:56,260 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) [2021-06-12 21:31:56,260 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2021-06-12 21:31:56,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:56,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:56,262 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:56,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-06-12 21:31:56,481 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash -530595531, now seen corresponding path program 8 times [2021-06-12 21:31:56,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:56,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935471661] [2021-06-12 21:31:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:56,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:56,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:56,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:56,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935471661] [2021-06-12 21:31:56,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935471661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:56,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504923862] [2021-06-12 21:31:56,520 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 [2021-06-12 21:31:56,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:31:56,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:56,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:31:56,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:56,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504923862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:56,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:56,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 21:31:56,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995163812] [2021-06-12 21:31:56,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:31:56,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:56,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:31:56,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:56,655 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) [2021-06-12 21:31:56,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:56,919 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-06-12 21:31:56,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 21:31:56,920 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 [2021-06-12 21:31:56,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:56,924 INFO L225 Difference]: With dead ends: 238 [2021-06-12 21:31:56,924 INFO L226 Difference]: Without dead ends: 235 [2021-06-12 21:31:56,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 232.8ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:31:56,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-06-12 21:31:56,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2021-06-12 21:31:56,928 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) [2021-06-12 21:31:56,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2021-06-12 21:31:56,929 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2021-06-12 21:31:56,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:56,930 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2021-06-12 21:31:56,930 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) [2021-06-12 21:31:56,930 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2021-06-12 21:31:56,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:56,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:56,932 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:57,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:57,150 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:57,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:57,150 INFO L82 PathProgramCache]: Analyzing trace with hash 420283757, now seen corresponding path program 9 times [2021-06-12 21:31:57,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:57,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748118113] [2021-06-12 21:31:57,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:57,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:57,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:31:57,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:57,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748118113] [2021-06-12 21:31:57,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748118113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:57,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818712085] [2021-06-12 21:31:57,188 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 [2021-06-12 21:31:57,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 21:31:57,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:57,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:31:57,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:57,335 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:57,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818712085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:57,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:57,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-12 21:31:57,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233216003] [2021-06-12 21:31:57,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 21:31:57,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:57,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 21:31:57,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-12 21:31:57,336 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) [2021-06-12 21:31:57,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:57,568 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2021-06-12 21:31:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 21:31:57,573 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 [2021-06-12 21:31:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:57,574 INFO L225 Difference]: With dead ends: 302 [2021-06-12 21:31:57,574 INFO L226 Difference]: Without dead ends: 300 [2021-06-12 21:31:57,575 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 198.5ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:31:57,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-06-12 21:31:57,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2021-06-12 21:31:57,580 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) [2021-06-12 21:31:57,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2021-06-12 21:31:57,581 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2021-06-12 21:31:57,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:57,581 INFO L482 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2021-06-12 21:31:57,582 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) [2021-06-12 21:31:57,582 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2021-06-12 21:31:57,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 21:31:57,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:57,582 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:57,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:57,797 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:57,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:57,797 INFO L82 PathProgramCache]: Analyzing trace with hash -86062509, now seen corresponding path program 10 times [2021-06-12 21:31:57,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:57,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515438415] [2021-06-12 21:31:57,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:57,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:57,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:57,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515438415] [2021-06-12 21:31:57,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515438415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:57,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408216725] [2021-06-12 21:31:57,841 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 [2021-06-12 21:31:57,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:31:57,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:57,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 21:31:57,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:57,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:57,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408216725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:57,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:57,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-12 21:31:57,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946901589] [2021-06-12 21:31:57,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:31:57,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:57,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:31:57,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:57,975 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) [2021-06-12 21:31:58,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:58,234 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2021-06-12 21:31:58,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 21:31:58,243 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 [2021-06-12 21:31:58,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:58,246 INFO L225 Difference]: With dead ends: 302 [2021-06-12 21:31:58,246 INFO L226 Difference]: Without dead ends: 296 [2021-06-12 21:31:58,248 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 248.8ms TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:31:58,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-06-12 21:31:58,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-06-12 21:31:58,253 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) [2021-06-12 21:31:58,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-06-12 21:31:58,254 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2021-06-12 21:31:58,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:58,254 INFO L482 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-06-12 21:31:58,255 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) [2021-06-12 21:31:58,255 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-06-12 21:31:58,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:58,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:58,255 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:58,478 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-12 21:31:58,478 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:58,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:58,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1988809563, now seen corresponding path program 11 times [2021-06-12 21:31:58,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:58,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178574600] [2021-06-12 21:31:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:58,587 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:58,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:58,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178574600] [2021-06-12 21:31:58,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178574600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:58,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433217063] [2021-06-12 21:31:58,587 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 [2021-06-12 21:31:58,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 21:31:58,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:58,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:31:58,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:31:58,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:31:58,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:31:58,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:31:58,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-12 21:31:58,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:58,797 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:58,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:31:58,799 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-12 21:31:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:58,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433217063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:58,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:58,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:31:58,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077568497] [2021-06-12 21:31:58,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:31:58,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:58,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:31:58,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:58,817 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) [2021-06-12 21:31:58,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:58,974 INFO L93 Difference]: Finished difference Result 282 states and 622 transitions. [2021-06-12 21:31:58,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:31:58,975 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 [2021-06-12 21:31:58,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:58,976 INFO L225 Difference]: With dead ends: 282 [2021-06-12 21:31:58,976 INFO L226 Difference]: Without dead ends: 257 [2021-06-12 21:31:58,976 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:58,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-06-12 21:31:58,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 214. [2021-06-12 21:31:58,981 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) [2021-06-12 21:31:58,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 499 transitions. [2021-06-12 21:31:58,982 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 499 transitions. Word has length 22 [2021-06-12 21:31:58,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:58,983 INFO L482 AbstractCegarLoop]: Abstraction has 214 states and 499 transitions. [2021-06-12 21:31:58,983 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) [2021-06-12 21:31:58,983 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 499 transitions. [2021-06-12 21:31:58,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:58,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:58,983 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:59,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-12 21:31:59,206 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:59,206 INFO L82 PathProgramCache]: Analyzing trace with hash 197742959, now seen corresponding path program 12 times [2021-06-12 21:31:59,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:59,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436044216] [2021-06-12 21:31:59,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:59,323 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:59,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:59,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436044216] [2021-06-12 21:31:59,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436044216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:59,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458183477] [2021-06-12 21:31:59,324 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 [2021-06-12 21:31:59,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:31:59,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:31:59,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:31:59,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:31:59,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:31:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:31:59,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:31:59,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-12 21:31:59,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:31:59,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:31:59,482 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:31:59,482 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-12 21:31:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:59,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458183477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:59,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:31:59,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:31:59,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302269205] [2021-06-12 21:31:59,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:31:59,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:31:59,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:31:59,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:31:59,505 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) [2021-06-12 21:31:59,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:31:59,632 INFO L93 Difference]: Finished difference Result 256 states and 583 transitions. [2021-06-12 21:31:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:31:59,632 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 [2021-06-12 21:31:59,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:31:59,634 INFO L225 Difference]: With dead ends: 256 [2021-06-12 21:31:59,634 INFO L226 Difference]: Without dead ends: 247 [2021-06-12 21:31:59,635 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-06-12 21:31:59,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-06-12 21:31:59,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-06-12 21:31:59,639 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) [2021-06-12 21:31:59,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 520 transitions. [2021-06-12 21:31:59,640 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 520 transitions. Word has length 22 [2021-06-12 21:31:59,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:31:59,640 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 520 transitions. [2021-06-12 21:31:59,641 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) [2021-06-12 21:31:59,641 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 520 transitions. [2021-06-12 21:31:59,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:31:59,641 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:31:59,641 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:31:59,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 21:31:59,864 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:31:59,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:31:59,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1748301367, now seen corresponding path program 13 times [2021-06-12 21:31:59,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:31:59,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386781069] [2021-06-12 21:31:59,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:31:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:59,965 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:31:59,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:31:59,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386781069] [2021-06-12 21:31:59,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386781069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:31:59,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437073606] [2021-06-12 21:31:59,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:31:59,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:31:59,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:31:59,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:00,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:00,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:00,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:00,136 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:00,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 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 [2021-06-12 21:32:00,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:00,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:00,145 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:00,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-12 21:32:00,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:00,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437073606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:00,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:00,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:32:00,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905021960] [2021-06-12 21:32:00,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:00,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:00,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:00,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:00,163 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) [2021-06-12 21:32:00,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:00,306 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-06-12 21:32:00,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 21:32:00,306 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 [2021-06-12 21:32:00,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:00,308 INFO L225 Difference]: With dead ends: 301 [2021-06-12 21:32:00,308 INFO L226 Difference]: Without dead ends: 278 [2021-06-12 21:32:00,308 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:00,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-06-12 21:32:00,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2021-06-12 21:32:00,313 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) [2021-06-12 21:32:00,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 533 transitions. [2021-06-12 21:32:00,313 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 533 transitions. Word has length 22 [2021-06-12 21:32:00,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:00,314 INFO L482 AbstractCegarLoop]: Abstraction has 227 states and 533 transitions. [2021-06-12 21:32:00,314 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) [2021-06-12 21:32:00,314 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 533 transitions. [2021-06-12 21:32:00,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-12 21:32:00,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:00,315 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:00,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:00,529 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:00,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:00,529 INFO L82 PathProgramCache]: Analyzing trace with hash 343984883, now seen corresponding path program 14 times [2021-06-12 21:32:00,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:00,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152010454] [2021-06-12 21:32:00,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:00,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:00,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152010454] [2021-06-12 21:32:00,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152010454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:00,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721060092] [2021-06-12 21:32:00,629 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 [2021-06-12 21:32:00,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:00,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:00,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 21:32:00,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:00,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:00,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:00,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:00,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:00,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-06-12 21:32:00,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:00,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:00,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:00,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-06-12 21:32:00,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:00,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721060092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:00,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:00,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-06-12 21:32:00,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533068405] [2021-06-12 21:32:00,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 21:32:00,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:00,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 21:32:00,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:00,782 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) [2021-06-12 21:32:00,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:00,906 INFO L93 Difference]: Finished difference Result 320 states and 703 transitions. [2021-06-12 21:32:00,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 21:32:00,907 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 [2021-06-12 21:32:00,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:00,908 INFO L225 Difference]: With dead ends: 320 [2021-06-12 21:32:00,908 INFO L226 Difference]: Without dead ends: 313 [2021-06-12 21:32:00,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 117.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-12 21:32:00,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-06-12 21:32:00,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 246. [2021-06-12 21:32:00,916 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) [2021-06-12 21:32:00,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 579 transitions. [2021-06-12 21:32:00,917 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 579 transitions. Word has length 22 [2021-06-12 21:32:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:00,917 INFO L482 AbstractCegarLoop]: Abstraction has 246 states and 579 transitions. [2021-06-12 21:32:00,917 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) [2021-06-12 21:32:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 579 transitions. [2021-06-12 21:32:00,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:00,919 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:00,919 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:01,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:01,141 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:01,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:01,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1412718173, now seen corresponding path program 15 times [2021-06-12 21:32:01,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:01,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191122002] [2021-06-12 21:32:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:01,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:01,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191122002] [2021-06-12 21:32:01,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191122002] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:01,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738878065] [2021-06-12 21:32:01,218 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 [2021-06-12 21:32:01,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:32:01,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:01,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:01,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:01,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738878065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:01,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:01,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-12 21:32:01,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413273531] [2021-06-12 21:32:01,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:32:01,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:01,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:32:01,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:01,409 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) [2021-06-12 21:32:01,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:01,899 INFO L93 Difference]: Finished difference Result 495 states and 1055 transitions. [2021-06-12 21:32:01,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:32:01,900 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 [2021-06-12 21:32:01,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:01,902 INFO L225 Difference]: With dead ends: 495 [2021-06-12 21:32:01,902 INFO L226 Difference]: Without dead ends: 495 [2021-06-12 21:32:01,902 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:32:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-06-12 21:32:01,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 238. [2021-06-12 21:32:01,913 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) [2021-06-12 21:32:01,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 560 transitions. [2021-06-12 21:32:01,914 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 560 transitions. Word has length 24 [2021-06-12 21:32:01,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:01,914 INFO L482 AbstractCegarLoop]: Abstraction has 238 states and 560 transitions. [2021-06-12 21:32:01,914 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) [2021-06-12 21:32:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 560 transitions. [2021-06-12 21:32:01,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:01,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:01,915 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:02,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:02,129 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:02,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1474117159, now seen corresponding path program 16 times [2021-06-12 21:32:02,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:02,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918075146] [2021-06-12 21:32:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:02,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:02,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918075146] [2021-06-12 21:32:02,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918075146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:02,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712125059] [2021-06-12 21:32:02,182 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 [2021-06-12 21:32:02,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:02,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:02,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:02,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:02,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712125059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:02,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:02,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 21:32:02,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339986104] [2021-06-12 21:32:02,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:32:02,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:02,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:32:02,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:32:02,381 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) [2021-06-12 21:32:02,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:02,982 INFO L93 Difference]: Finished difference Result 696 states and 1431 transitions. [2021-06-12 21:32:02,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:32:02,983 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 [2021-06-12 21:32:02,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:02,985 INFO L225 Difference]: With dead ends: 696 [2021-06-12 21:32:02,985 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 21:32:02,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 525.8ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:32:02,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 21:32:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 294. [2021-06-12 21:32:02,995 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) [2021-06-12 21:32:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 697 transitions. [2021-06-12 21:32:02,996 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 697 transitions. Word has length 24 [2021-06-12 21:32:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:02,996 INFO L482 AbstractCegarLoop]: Abstraction has 294 states and 697 transitions. [2021-06-12 21:32:02,996 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) [2021-06-12 21:32:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 697 transitions. [2021-06-12 21:32:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:02,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:02,997 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:03,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-12 21:32:03,221 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash -964250137, now seen corresponding path program 17 times [2021-06-12 21:32:03,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:03,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097999871] [2021-06-12 21:32:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:03,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:03,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097999871] [2021-06-12 21:32:03,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097999871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:03,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098079827] [2021-06-12 21:32:03,284 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 [2021-06-12 21:32:03,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:32:03,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:03,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:03,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:03,452 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:03,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098079827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:03,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:03,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-12 21:32:03,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606279967] [2021-06-12 21:32:03,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:32:03,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:03,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:32:03,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:32:03,454 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) [2021-06-12 21:32:03,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:03,950 INFO L93 Difference]: Finished difference Result 654 states and 1426 transitions. [2021-06-12 21:32:03,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:32:03,951 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 [2021-06-12 21:32:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:03,953 INFO L225 Difference]: With dead ends: 654 [2021-06-12 21:32:03,953 INFO L226 Difference]: Without dead ends: 652 [2021-06-12 21:32:03,954 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:32:03,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-06-12 21:32:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 362. [2021-06-12 21:32:03,963 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) [2021-06-12 21:32:03,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 875 transitions. [2021-06-12 21:32:03,964 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 875 transitions. Word has length 24 [2021-06-12 21:32:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:03,965 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 875 transitions. [2021-06-12 21:32:03,965 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) [2021-06-12 21:32:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 875 transitions. [2021-06-12 21:32:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:03,966 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:03,966 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:04,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-12 21:32:04,181 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:04,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:04,181 INFO L82 PathProgramCache]: Analyzing trace with hash -1295928925, now seen corresponding path program 18 times [2021-06-12 21:32:04,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:04,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120778183] [2021-06-12 21:32:04,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:04,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:04,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:04,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120778183] [2021-06-12 21:32:04,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120778183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:04,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303501077] [2021-06-12 21:32:04,240 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 [2021-06-12 21:32:04,270 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:32:04,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:04,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:04,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:04,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303501077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:04,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:04,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-12 21:32:04,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756683624] [2021-06-12 21:32:04,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:32:04,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:04,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:32:04,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:32:04,409 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) [2021-06-12 21:32:04,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:04,798 INFO L93 Difference]: Finished difference Result 539 states and 1206 transitions. [2021-06-12 21:32:04,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:32:04,798 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 [2021-06-12 21:32:04,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:04,800 INFO L225 Difference]: With dead ends: 539 [2021-06-12 21:32:04,800 INFO L226 Difference]: Without dead ends: 535 [2021-06-12 21:32:04,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:32:04,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-06-12 21:32:04,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 362. [2021-06-12 21:32:04,809 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) [2021-06-12 21:32:04,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 874 transitions. [2021-06-12 21:32:04,810 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 874 transitions. Word has length 24 [2021-06-12 21:32:04,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:04,810 INFO L482 AbstractCegarLoop]: Abstraction has 362 states and 874 transitions. [2021-06-12 21:32:04,810 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) [2021-06-12 21:32:04,810 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 874 transitions. [2021-06-12 21:32:04,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:04,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:04,811 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:05,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 21:32:05,025 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:05,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:05,025 INFO L82 PathProgramCache]: Analyzing trace with hash -1782884239, now seen corresponding path program 19 times [2021-06-12 21:32:05,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:05,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957695480] [2021-06-12 21:32:05,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:05,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:05,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:05,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957695480] [2021-06-12 21:32:05,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957695480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:05,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946061808] [2021-06-12 21:32:05,066 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 [2021-06-12 21:32:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:05,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:05,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:05,228 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:05,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946061808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:05,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:05,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-12 21:32:05,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353350278] [2021-06-12 21:32:05,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:32:05,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:05,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:32:05,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:32:05,231 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) [2021-06-12 21:32:05,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:05,606 INFO L93 Difference]: Finished difference Result 593 states and 1318 transitions. [2021-06-12 21:32:05,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:32:05,607 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 [2021-06-12 21:32:05,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:05,609 INFO L225 Difference]: With dead ends: 593 [2021-06-12 21:32:05,609 INFO L226 Difference]: Without dead ends: 584 [2021-06-12 21:32:05,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 333.4ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:32:05,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-06-12 21:32:05,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 383. [2021-06-12 21:32:05,618 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) [2021-06-12 21:32:05,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 933 transitions. [2021-06-12 21:32:05,619 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 933 transitions. Word has length 24 [2021-06-12 21:32:05,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:05,620 INFO L482 AbstractCegarLoop]: Abstraction has 383 states and 933 transitions. [2021-06-12 21:32:05,620 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) [2021-06-12 21:32:05,620 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 933 transitions. [2021-06-12 21:32:05,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:05,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:05,621 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:05,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-12 21:32:05,844 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:05,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:05,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1338351217, now seen corresponding path program 20 times [2021-06-12 21:32:05,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:05,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832463972] [2021-06-12 21:32:05,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:05,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:05,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:05,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832463972] [2021-06-12 21:32:05,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832463972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:05,897 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142192078] [2021-06-12 21:32:05,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:32:05,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:05,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:05,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:05,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:06,056 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:06,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142192078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:06,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:06,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:32:06,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824376913] [2021-06-12 21:32:06,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:32:06,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:06,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:32:06,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:06,058 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) [2021-06-12 21:32:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:06,510 INFO L93 Difference]: Finished difference Result 701 states and 1556 transitions. [2021-06-12 21:32:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:32:06,521 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 [2021-06-12 21:32:06,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:06,524 INFO L225 Difference]: With dead ends: 701 [2021-06-12 21:32:06,524 INFO L226 Difference]: Without dead ends: 687 [2021-06-12 21:32:06,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:32:06,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-06-12 21:32:06,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 386. [2021-06-12 21:32:06,542 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) [2021-06-12 21:32:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 938 transitions. [2021-06-12 21:32:06,543 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 938 transitions. Word has length 24 [2021-06-12 21:32:06,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:06,544 INFO L482 AbstractCegarLoop]: Abstraction has 386 states and 938 transitions. [2021-06-12 21:32:06,544 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) [2021-06-12 21:32:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 938 transitions. [2021-06-12 21:32:06,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:06,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:06,545 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:06,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-12 21:32:06,761 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:06,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:06,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1334899385, now seen corresponding path program 21 times [2021-06-12 21:32:06,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:06,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386488394] [2021-06-12 21:32:06,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:06,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:06,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386488394] [2021-06-12 21:32:06,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386488394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:06,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455233505] [2021-06-12 21:32:06,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:32:06,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:32:06,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:06,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:06,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:06,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455233505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:06,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:06,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 21:32:06,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165720228] [2021-06-12 21:32:06,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:32:06,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:06,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:32:06,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:32:06,986 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) [2021-06-12 21:32:07,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:07,426 INFO L93 Difference]: Finished difference Result 817 states and 1787 transitions. [2021-06-12 21:32:07,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 21:32:07,427 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 [2021-06-12 21:32:07,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:07,430 INFO L225 Difference]: With dead ends: 817 [2021-06-12 21:32:07,430 INFO L226 Difference]: Without dead ends: 817 [2021-06-12 21:32:07,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 398.1ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:32:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-06-12 21:32:07,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 408. [2021-06-12 21:32:07,440 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) [2021-06-12 21:32:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 980 transitions. [2021-06-12 21:32:07,441 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 980 transitions. Word has length 24 [2021-06-12 21:32:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:07,441 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 980 transitions. [2021-06-12 21:32:07,442 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) [2021-06-12 21:32:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 980 transitions. [2021-06-12 21:32:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:07,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:07,443 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:07,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:07,657 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:07,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:07,657 INFO L82 PathProgramCache]: Analyzing trace with hash -2049905863, now seen corresponding path program 22 times [2021-06-12 21:32:07,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:07,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415410359] [2021-06-12 21:32:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:07,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:07,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:07,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415410359] [2021-06-12 21:32:07,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415410359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:07,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071810189] [2021-06-12 21:32:07,709 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 [2021-06-12 21:32:07,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:07,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:07,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:07,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:07,883 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:07,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071810189] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:07,884 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:07,884 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:32:07,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457134732] [2021-06-12 21:32:07,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:32:07,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:07,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:32:07,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:07,885 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) [2021-06-12 21:32:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:08,301 INFO L93 Difference]: Finished difference Result 578 states and 1266 transitions. [2021-06-12 21:32:08,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 21:32:08,304 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 [2021-06-12 21:32:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:08,306 INFO L225 Difference]: With dead ends: 578 [2021-06-12 21:32:08,306 INFO L226 Difference]: Without dead ends: 560 [2021-06-12 21:32:08,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 384.0ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:32:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-06-12 21:32:08,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-06-12 21:32:08,315 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) [2021-06-12 21:32:08,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 976 transitions. [2021-06-12 21:32:08,316 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 976 transitions. Word has length 24 [2021-06-12 21:32:08,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:08,316 INFO L482 AbstractCegarLoop]: Abstraction has 408 states and 976 transitions. [2021-06-12 21:32:08,316 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) [2021-06-12 21:32:08,316 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 976 transitions. [2021-06-12 21:32:08,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:08,317 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:08,317 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:08,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 21:32:08,533 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash -275355531, now seen corresponding path program 23 times [2021-06-12 21:32:08,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:08,535 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495139625] [2021-06-12 21:32:08,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:08,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:08,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:08,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495139625] [2021-06-12 21:32:08,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495139625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:08,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021172550] [2021-06-12 21:32:08,588 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 [2021-06-12 21:32:08,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:32:08,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:08,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:08,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:08,754 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:08,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021172550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:08,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:08,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:32:08,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951776604] [2021-06-12 21:32:08,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:32:08,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:08,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:32:08,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:08,755 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) [2021-06-12 21:32:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:09,286 INFO L93 Difference]: Finished difference Result 943 states and 2146 transitions. [2021-06-12 21:32:09,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:32:09,293 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 [2021-06-12 21:32:09,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:09,295 INFO L225 Difference]: With dead ends: 943 [2021-06-12 21:32:09,295 INFO L226 Difference]: Without dead ends: 943 [2021-06-12 21:32:09,296 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 494.6ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:32:09,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-06-12 21:32:09,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 633. [2021-06-12 21:32:09,308 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) [2021-06-12 21:32:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1571 transitions. [2021-06-12 21:32:09,309 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1571 transitions. Word has length 24 [2021-06-12 21:32:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:09,309 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1571 transitions. [2021-06-12 21:32:09,310 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) [2021-06-12 21:32:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1571 transitions. [2021-06-12 21:32:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:09,311 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:09,311 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:09,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:09,521 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:09,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:09,521 INFO L82 PathProgramCache]: Analyzing trace with hash -2027436755, now seen corresponding path program 24 times [2021-06-12 21:32:09,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:09,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710959737] [2021-06-12 21:32:09,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:09,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:09,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710959737] [2021-06-12 21:32:09,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710959737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:09,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237665645] [2021-06-12 21:32:09,561 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 [2021-06-12 21:32:09,585 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:32:09,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:09,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:09,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:09,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:09,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237665645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:09,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:09,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-12 21:32:09,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864661277] [2021-06-12 21:32:09,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 21:32:09,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:09,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 21:32:09,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-12 21:32:09,709 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) [2021-06-12 21:32:10,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:10,098 INFO L93 Difference]: Finished difference Result 910 states and 2079 transitions. [2021-06-12 21:32:10,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 21:32:10,098 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 [2021-06-12 21:32:10,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:10,101 INFO L225 Difference]: With dead ends: 910 [2021-06-12 21:32:10,101 INFO L226 Difference]: Without dead ends: 906 [2021-06-12 21:32:10,101 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 359.1ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 21:32:10,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-06-12 21:32:10,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 633. [2021-06-12 21:32:10,114 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) [2021-06-12 21:32:10,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1568 transitions. [2021-06-12 21:32:10,115 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1568 transitions. Word has length 24 [2021-06-12 21:32:10,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:10,115 INFO L482 AbstractCegarLoop]: Abstraction has 633 states and 1568 transitions. [2021-06-12 21:32:10,115 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) [2021-06-12 21:32:10,115 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1568 transitions. [2021-06-12 21:32:10,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:10,116 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:10,116 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:10,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 21:32:10,338 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:10,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:10,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1761184275, now seen corresponding path program 25 times [2021-06-12 21:32:10,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:10,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070664202] [2021-06-12 21:32:10,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:10,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:10,380 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:10,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:10,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070664202] [2021-06-12 21:32:10,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070664202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:10,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609078918] [2021-06-12 21:32:10,381 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 [2021-06-12 21:32:10,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:10,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:10,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609078918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:10,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:10,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-12 21:32:10,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976204995] [2021-06-12 21:32:10,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 21:32:10,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:10,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 21:32:10,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-12 21:32:10,534 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) [2021-06-12 21:32:10,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:10,937 INFO L93 Difference]: Finished difference Result 997 states and 2276 transitions. [2021-06-12 21:32:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 21:32:10,938 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 [2021-06-12 21:32:10,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:10,940 INFO L225 Difference]: With dead ends: 997 [2021-06-12 21:32:10,940 INFO L226 Difference]: Without dead ends: 985 [2021-06-12 21:32:10,941 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 359.7ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 21:32:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-06-12 21:32:10,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 684. [2021-06-12 21:32:10,951 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) [2021-06-12 21:32:10,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1705 transitions. [2021-06-12 21:32:10,952 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1705 transitions. Word has length 24 [2021-06-12 21:32:10,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:10,952 INFO L482 AbstractCegarLoop]: Abstraction has 684 states and 1705 transitions. [2021-06-12 21:32:10,952 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) [2021-06-12 21:32:10,952 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1705 transitions. [2021-06-12 21:32:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-12 21:32:10,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:10,954 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:11,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:11,176 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:11,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:11,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1533962895, now seen corresponding path program 26 times [2021-06-12 21:32:11,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:11,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757099613] [2021-06-12 21:32:11,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:11,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:11,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:11,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757099613] [2021-06-12 21:32:11,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757099613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:11,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280156649] [2021-06-12 21:32:11,231 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 [2021-06-12 21:32:11,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:11,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:11,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 21:32:11,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:11,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:11,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280156649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:11,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:11,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-12 21:32:11,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731131540] [2021-06-12 21:32:11,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 21:32:11,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:11,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 21:32:11,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-12 21:32:11,380 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) [2021-06-12 21:32:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:11,888 INFO L93 Difference]: Finished difference Result 1028 states and 2383 transitions. [2021-06-12 21:32:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:32:11,889 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 [2021-06-12 21:32:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:11,892 INFO L225 Difference]: With dead ends: 1028 [2021-06-12 21:32:11,892 INFO L226 Difference]: Without dead ends: 1008 [2021-06-12 21:32:11,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 468.1ms TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:32:11,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-06-12 21:32:11,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 740. [2021-06-12 21:32:11,906 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) [2021-06-12 21:32:11,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1854 transitions. [2021-06-12 21:32:11,907 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1854 transitions. Word has length 24 [2021-06-12 21:32:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:11,907 INFO L482 AbstractCegarLoop]: Abstraction has 740 states and 1854 transitions. [2021-06-12 21:32:11,907 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) [2021-06-12 21:32:11,907 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1854 transitions. [2021-06-12 21:32:11,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:11,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:11,909 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:12,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-12 21:32:12,125 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:12,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:12,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1047161765, now seen corresponding path program 27 times [2021-06-12 21:32:12,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:12,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368141716] [2021-06-12 21:32:12,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:12,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:12,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:12,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368141716] [2021-06-12 21:32:12,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368141716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:12,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753393972] [2021-06-12 21:32:12,385 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 [2021-06-12 21:32:12,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 21:32:12,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:12,409 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 21:32:12,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:12,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:12,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:12,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:12,968 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:12,969 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 [2021-06-12 21:32:13,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:32:13,050 INFO L628 ElimStorePlain]: treesize reduction 52, result has 40.2 percent of original size [2021-06-12 21:32:13,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:32:13,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-06-12 21:32:13,126 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:13,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753393972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:13,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:13,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-06-12 21:32:13,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329354167] [2021-06-12 21:32:13,127 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:32:13,127 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:13,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:32:13,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:32:13,127 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) [2021-06-12 21:32:14,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:14,373 INFO L93 Difference]: Finished difference Result 1044 states and 2520 transitions. [2021-06-12 21:32:14,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:32:14,373 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 [2021-06-12 21:32:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:14,376 INFO L225 Difference]: With dead ends: 1044 [2021-06-12 21:32:14,376 INFO L226 Difference]: Without dead ends: 1030 [2021-06-12 21:32:14,376 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1262.3ms TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2021-06-12 21:32:14,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-06-12 21:32:14,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 756. [2021-06-12 21:32:14,387 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) [2021-06-12 21:32:14,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1894 transitions. [2021-06-12 21:32:14,389 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1894 transitions. Word has length 26 [2021-06-12 21:32:14,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:14,389 INFO L482 AbstractCegarLoop]: Abstraction has 756 states and 1894 transitions. [2021-06-12 21:32:14,389 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) [2021-06-12 21:32:14,389 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1894 transitions. [2021-06-12 21:32:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:14,390 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:14,390 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:14,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:14,612 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:14,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:14,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1487367885, now seen corresponding path program 28 times [2021-06-12 21:32:14,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:14,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497532815] [2021-06-12 21:32:14,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:14,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:14,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497532815] [2021-06-12 21:32:14,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497532815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:14,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072950107] [2021-06-12 21:32:14,878 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 [2021-06-12 21:32:14,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:14,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:14,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:32:14,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:15,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:15,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:15,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:15,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:15,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:15,113 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:15,114 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:15,115 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 [2021-06-12 21:32:15,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:15,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:15,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:15,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-12 21:32:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:15,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072950107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:15,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:15,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-12 21:32:15,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717505114] [2021-06-12 21:32:15,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:15,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:15,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:15,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:15,143 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) [2021-06-12 21:32:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:16,197 INFO L93 Difference]: Finished difference Result 1114 states and 2686 transitions. [2021-06-12 21:32:16,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:32:16,197 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 [2021-06-12 21:32:16,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:16,200 INFO L225 Difference]: With dead ends: 1114 [2021-06-12 21:32:16,200 INFO L226 Difference]: Without dead ends: 1066 [2021-06-12 21:32:16,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1084.4ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:32:16,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-06-12 21:32:16,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 785. [2021-06-12 21:32:16,212 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) [2021-06-12 21:32:16,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1952 transitions. [2021-06-12 21:32:16,214 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1952 transitions. Word has length 26 [2021-06-12 21:32:16,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:16,214 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 1952 transitions. [2021-06-12 21:32:16,214 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) [2021-06-12 21:32:16,214 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1952 transitions. [2021-06-12 21:32:16,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:16,216 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:16,216 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:16,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 21:32:16,438 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:16,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:16,439 INFO L82 PathProgramCache]: Analyzing trace with hash 15104427, now seen corresponding path program 29 times [2021-06-12 21:32:16,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:16,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391176504] [2021-06-12 21:32:16,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:16,710 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:16,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:16,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391176504] [2021-06-12 21:32:16,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391176504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:16,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395587451] [2021-06-12 21:32:16,711 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 [2021-06-12 21:32:16,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:32:16,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:16,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:32:16,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:16,953 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:16,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:16,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:16,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:16,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:16,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:16,957 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 [2021-06-12 21:32:16,958 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:16,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:16,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:16,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-12 21:32:16,983 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:16,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395587451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:16,984 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:16,984 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-12 21:32:16,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614173966] [2021-06-12 21:32:16,984 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:16,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:16,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:16,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:16,985 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) [2021-06-12 21:32:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:18,284 INFO L93 Difference]: Finished difference Result 1322 states and 3150 transitions. [2021-06-12 21:32:18,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:32:18,285 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 [2021-06-12 21:32:18,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:18,289 INFO L225 Difference]: With dead ends: 1322 [2021-06-12 21:32:18,289 INFO L226 Difference]: Without dead ends: 1313 [2021-06-12 21:32:18,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1315.0ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:32:18,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-06-12 21:32:18,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 825. [2021-06-12 21:32:18,302 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) [2021-06-12 21:32:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2053 transitions. [2021-06-12 21:32:18,304 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2053 transitions. Word has length 26 [2021-06-12 21:32:18,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:18,304 INFO L482 AbstractCegarLoop]: Abstraction has 825 states and 2053 transitions. [2021-06-12 21:32:18,304 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) [2021-06-12 21:32:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2053 transitions. [2021-06-12 21:32:18,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:18,306 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:18,306 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:18,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:18,528 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:18,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:18,529 INFO L82 PathProgramCache]: Analyzing trace with hash 889695859, now seen corresponding path program 30 times [2021-06-12 21:32:18,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:18,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552587570] [2021-06-12 21:32:18,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:18,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:18,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552587570] [2021-06-12 21:32:18,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552587570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:18,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062862685] [2021-06-12 21:32:18,777 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 [2021-06-12 21:32:18,811 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:32:18,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:18,812 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 21:32:18,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:19,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:19,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:19,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:19,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:19,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:19,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:19,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:19,193 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:19,194 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 [2021-06-12 21:32:19,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:19,214 INFO L628 ElimStorePlain]: treesize reduction 3, result has 88.5 percent of original size [2021-06-12 21:32:19,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:19,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:68, output treesize:7 [2021-06-12 21:32:19,237 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:19,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062862685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:19,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:19,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:32:19,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737014422] [2021-06-12 21:32:19,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:32:19,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:19,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:32:19,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:19,239 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) [2021-06-12 21:32:20,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:20,120 INFO L93 Difference]: Finished difference Result 1058 states and 2506 transitions. [2021-06-12 21:32:20,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 21:32:20,120 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 [2021-06-12 21:32:20,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:20,124 INFO L225 Difference]: With dead ends: 1058 [2021-06-12 21:32:20,124 INFO L226 Difference]: Without dead ends: 1026 [2021-06-12 21:32:20,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 961.5ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:32:20,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-06-12 21:32:20,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 871. [2021-06-12 21:32:20,139 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) [2021-06-12 21:32:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2181 transitions. [2021-06-12 21:32:20,141 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2181 transitions. Word has length 26 [2021-06-12 21:32:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:20,141 INFO L482 AbstractCegarLoop]: Abstraction has 871 states and 2181 transitions. [2021-06-12 21:32:20,141 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) [2021-06-12 21:32:20,141 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2181 transitions. [2021-06-12 21:32:20,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:20,143 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:20,143 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:20,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:20,357 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:20,357 INFO L82 PathProgramCache]: Analyzing trace with hash -2122713361, now seen corresponding path program 31 times [2021-06-12 21:32:20,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:20,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562325870] [2021-06-12 21:32:20,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:20,590 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:20,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:20,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562325870] [2021-06-12 21:32:20,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562325870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:20,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60298175] [2021-06-12 21:32:20,590 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 [2021-06-12 21:32:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:20,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:32:20,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:20,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:20,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:20,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:20,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:20,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:20,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:20,805 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 [2021-06-12 21:32:20,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:20,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:20,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:20,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-12 21:32:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:20,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60298175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:20,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:20,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 21:32:20,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9562599] [2021-06-12 21:32:20,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:20,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:20,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:20,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:20,831 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) [2021-06-12 21:32:21,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:21,656 INFO L93 Difference]: Finished difference Result 1083 states and 2599 transitions. [2021-06-12 21:32:21,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:32:21,657 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 [2021-06-12 21:32:21,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:21,660 INFO L225 Difference]: With dead ends: 1083 [2021-06-12 21:32:21,660 INFO L226 Difference]: Without dead ends: 1052 [2021-06-12 21:32:21,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 808.3ms TimeCoverageRelationStatistics Valid=267, Invalid=1293, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 21:32:21,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-06-12 21:32:21,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 900. [2021-06-12 21:32:21,670 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) [2021-06-12 21:32:21,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2248 transitions. [2021-06-12 21:32:21,672 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2248 transitions. Word has length 26 [2021-06-12 21:32:21,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:21,672 INFO L482 AbstractCegarLoop]: Abstraction has 900 states and 2248 transitions. [2021-06-12 21:32:21,672 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) [2021-06-12 21:32:21,672 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2248 transitions. [2021-06-12 21:32:21,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:21,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:21,674 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:21,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-12 21:32:21,889 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:21,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1180327377, now seen corresponding path program 32 times [2021-06-12 21:32:21,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:21,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902029275] [2021-06-12 21:32:21,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:21,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:22,156 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:22,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:22,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902029275] [2021-06-12 21:32:22,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902029275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:22,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767313512] [2021-06-12 21:32:22,157 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 [2021-06-12 21:32:22,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:22,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:22,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:32:22,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:22,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:22,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:22,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:22,343 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:22,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:22,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:22,345 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 [2021-06-12 21:32:22,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:22,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:22,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:22,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-12 21:32:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:22,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767313512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:22,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:22,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 21:32:22,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386477154] [2021-06-12 21:32:22,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:22,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:22,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:22,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:22,372 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) [2021-06-12 21:32:23,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:23,547 INFO L93 Difference]: Finished difference Result 1238 states and 2925 transitions. [2021-06-12 21:32:23,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:32:23,547 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 [2021-06-12 21:32:23,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:23,551 INFO L225 Difference]: With dead ends: 1238 [2021-06-12 21:32:23,551 INFO L226 Difference]: Without dead ends: 1186 [2021-06-12 21:32:23,552 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1101.3ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 21:32:23,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1186 states. [2021-06-12 21:32:23,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1186 to 957. [2021-06-12 21:32:23,564 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) [2021-06-12 21:32:23,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2390 transitions. [2021-06-12 21:32:23,565 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2390 transitions. Word has length 26 [2021-06-12 21:32:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:23,565 INFO L482 AbstractCegarLoop]: Abstraction has 957 states and 2390 transitions. [2021-06-12 21:32:23,565 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) [2021-06-12 21:32:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2390 transitions. [2021-06-12 21:32:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:23,567 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:23,567 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:23,769 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:23,769 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:23,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:23,770 INFO L82 PathProgramCache]: Analyzing trace with hash -514620625, now seen corresponding path program 33 times [2021-06-12 21:32:23,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:23,770 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569566552] [2021-06-12 21:32:23,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:23,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:23,994 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:23,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:23,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569566552] [2021-06-12 21:32:23,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569566552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:23,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139103041] [2021-06-12 21:32:23,994 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 [2021-06-12 21:32:24,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:32:24,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:24,018 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-12 21:32:24,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:24,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:24,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:24,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:24,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:24,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:24,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:24,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:24,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:24,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:24,280 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:24,280 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 [2021-06-12 21:32:24,302 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:32:24,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:24,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:32:24,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:74, output treesize:27 [2021-06-12 21:32:24,388 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:24,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139103041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:24,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:24,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-06-12 21:32:24,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275884290] [2021-06-12 21:32:24,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:32:24,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:24,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:32:24,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:32:24,389 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) [2021-06-12 21:32:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:26,218 INFO L93 Difference]: Finished difference Result 1077 states and 2608 transitions. [2021-06-12 21:32:26,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:32:26,219 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 [2021-06-12 21:32:26,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:26,221 INFO L225 Difference]: With dead ends: 1077 [2021-06-12 21:32:26,221 INFO L226 Difference]: Without dead ends: 1042 [2021-06-12 21:32:26,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1622.5ms TimeCoverageRelationStatistics Valid=309, Invalid=2343, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:32:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2021-06-12 21:32:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 964. [2021-06-12 21:32:26,235 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) [2021-06-12 21:32:26,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 964 states to 964 states and 2402 transitions. [2021-06-12 21:32:26,237 INFO L78 Accepts]: Start accepts. Automaton has 964 states and 2402 transitions. Word has length 26 [2021-06-12 21:32:26,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:26,237 INFO L482 AbstractCegarLoop]: Abstraction has 964 states and 2402 transitions. [2021-06-12 21:32:26,237 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) [2021-06-12 21:32:26,237 INFO L276 IsEmpty]: Start isEmpty. Operand 964 states and 2402 transitions. [2021-06-12 21:32:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:26,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:26,239 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:26,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-12 21:32:26,440 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:26,440 INFO L82 PathProgramCache]: Analyzing trace with hash 102747963, now seen corresponding path program 34 times [2021-06-12 21:32:26,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:26,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790403047] [2021-06-12 21:32:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:26,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:26,713 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:26,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:26,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790403047] [2021-06-12 21:32:26,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790403047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:26,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426773726] [2021-06-12 21:32:26,714 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 [2021-06-12 21:32:26,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:26,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:26,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:32:26,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:26,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:26,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:26,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:26,983 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:26,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:26,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:26,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:26,986 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 [2021-06-12 21:32:26,987 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:26,993 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:26,994 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:26,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-12 21:32:27,017 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:27,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426773726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:27,018 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:27,018 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-06-12 21:32:27,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715244466] [2021-06-12 21:32:27,018 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:27,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:27,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:27,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:27,019 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) [2021-06-12 21:32:28,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:28,030 INFO L93 Difference]: Finished difference Result 1320 states and 3177 transitions. [2021-06-12 21:32:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 21:32:28,031 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 [2021-06-12 21:32:28,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:28,033 INFO L225 Difference]: With dead ends: 1320 [2021-06-12 21:32:28,033 INFO L226 Difference]: Without dead ends: 1283 [2021-06-12 21:32:28,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 990.7ms TimeCoverageRelationStatistics Valid=243, Invalid=1397, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:32:28,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2021-06-12 21:32:28,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 995. [2021-06-12 21:32:28,049 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) [2021-06-12 21:32:28,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2484 transitions. [2021-06-12 21:32:28,050 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2484 transitions. Word has length 26 [2021-06-12 21:32:28,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:28,051 INFO L482 AbstractCegarLoop]: Abstraction has 995 states and 2484 transitions. [2021-06-12 21:32:28,051 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) [2021-06-12 21:32:28,051 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2484 transitions. [2021-06-12 21:32:28,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:28,052 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:28,052 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:28,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:28,275 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:28,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:28,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1163999753, now seen corresponding path program 35 times [2021-06-12 21:32:28,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:28,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271358930] [2021-06-12 21:32:28,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:28,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:28,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:28,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271358930] [2021-06-12 21:32:28,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271358930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:28,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660285681] [2021-06-12 21:32:28,473 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 [2021-06-12 21:32:28,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:32:28,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:28,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:32:28,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:28,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:28,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:28,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:28,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:28,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:28,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:28,726 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:28,727 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 [2021-06-12 21:32:28,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:28,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:28,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:28,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-12 21:32:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:28,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660285681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:28,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:28,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 21:32:28,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825812934] [2021-06-12 21:32:28,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:28,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:28,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:28,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:28,754 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) [2021-06-12 21:32:29,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:29,550 INFO L93 Difference]: Finished difference Result 1297 states and 3058 transitions. [2021-06-12 21:32:29,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 21:32:29,551 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 [2021-06-12 21:32:29,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:29,553 INFO L225 Difference]: With dead ends: 1297 [2021-06-12 21:32:29,553 INFO L226 Difference]: Without dead ends: 1263 [2021-06-12 21:32:29,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 753.4ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 21:32:29,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1263 states. [2021-06-12 21:32:29,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1263 to 1043. [2021-06-12 21:32:29,565 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) [2021-06-12 21:32:29,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 2619 transitions. [2021-06-12 21:32:29,568 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 2619 transitions. Word has length 26 [2021-06-12 21:32:29,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:29,568 INFO L482 AbstractCegarLoop]: Abstraction has 1043 states and 2619 transitions. [2021-06-12 21:32:29,568 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) [2021-06-12 21:32:29,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 2619 transitions. [2021-06-12 21:32:29,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:29,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:29,570 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:29,781 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-06-12 21:32:29,782 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:29,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:29,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1726651059, now seen corresponding path program 36 times [2021-06-12 21:32:29,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:29,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392265950] [2021-06-12 21:32:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:29,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:29,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392265950] [2021-06-12 21:32:29,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392265950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:29,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643335764] [2021-06-12 21:32:29,998 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 [2021-06-12 21:32:30,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 21:32:30,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:30,036 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 21:32:30,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:30,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:30,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:30,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:30,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:30,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:30,382 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 [2021-06-12 21:32:30,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:32:30,446 INFO L628 ElimStorePlain]: treesize reduction 36, result has 51.4 percent of original size [2021-06-12 21:32:30,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:30,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:50 [2021-06-12 21:32:30,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:30,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643335764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:30,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:30,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-06-12 21:32:30,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58284628] [2021-06-12 21:32:30,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:32:30,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:30,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:32:30,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:30,585 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) [2021-06-12 21:32:32,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:32,520 INFO L93 Difference]: Finished difference Result 1498 states and 3593 transitions. [2021-06-12 21:32:32,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:32:32,520 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 [2021-06-12 21:32:32,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:32,523 INFO L225 Difference]: With dead ends: 1498 [2021-06-12 21:32:32,523 INFO L226 Difference]: Without dead ends: 1436 [2021-06-12 21:32:32,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 1965.2ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:32:32,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1436 states. [2021-06-12 21:32:32,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1436 to 1086. [2021-06-12 21:32:32,540 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) [2021-06-12 21:32:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1086 states to 1086 states and 2725 transitions. [2021-06-12 21:32:32,542 INFO L78 Accepts]: Start accepts. Automaton has 1086 states and 2725 transitions. Word has length 26 [2021-06-12 21:32:32,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:32,542 INFO L482 AbstractCegarLoop]: Abstraction has 1086 states and 2725 transitions. [2021-06-12 21:32:32,542 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) [2021-06-12 21:32:32,542 INFO L276 IsEmpty]: Start isEmpty. Operand 1086 states and 2725 transitions. [2021-06-12 21:32:32,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:32,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:32,544 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:32,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 21:32:32,753 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:32,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:32,753 INFO L82 PathProgramCache]: Analyzing trace with hash 609282159, now seen corresponding path program 37 times [2021-06-12 21:32:32,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:32,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169483662] [2021-06-12 21:32:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:33,038 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:33,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:33,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169483662] [2021-06-12 21:32:33,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169483662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:33,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290016440] [2021-06-12 21:32:33,038 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 [2021-06-12 21:32:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:33,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:32:33,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:33,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:33,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:33,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:33,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:33,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:33,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:33,233 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 [2021-06-12 21:32:33,234 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:33,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:33,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:33,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-12 21:32:33,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:33,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290016440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:33,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:33,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 21:32:33,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492633141] [2021-06-12 21:32:33,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:33,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:33,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:33,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:33,267 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) [2021-06-12 21:32:34,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:34,368 INFO L93 Difference]: Finished difference Result 1318 states and 3210 transitions. [2021-06-12 21:32:34,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:32:34,368 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 [2021-06-12 21:32:34,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:34,370 INFO L225 Difference]: With dead ends: 1318 [2021-06-12 21:32:34,370 INFO L226 Difference]: Without dead ends: 1276 [2021-06-12 21:32:34,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1140.7ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:32:34,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-12 21:32:34,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1112. [2021-06-12 21:32:34,382 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) [2021-06-12 21:32:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 2779 transitions. [2021-06-12 21:32:34,385 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 2779 transitions. Word has length 26 [2021-06-12 21:32:34,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:34,385 INFO L482 AbstractCegarLoop]: Abstraction has 1112 states and 2779 transitions. [2021-06-12 21:32:34,385 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) [2021-06-12 21:32:34,385 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 2779 transitions. [2021-06-12 21:32:34,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 21:32:34,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:34,387 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:34,590 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:34,590 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:34,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:34,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712627, now seen corresponding path program 38 times [2021-06-12 21:32:34,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:34,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210002304] [2021-06-12 21:32:34,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:34,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:34,813 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:34,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:34,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210002304] [2021-06-12 21:32:34,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210002304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:34,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345475318] [2021-06-12 21:32:34,814 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 [2021-06-12 21:32:34,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:34,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:34,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 21:32:34,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:35,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:35,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:35,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:35,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:35,005 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:35,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:35,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:35,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:35,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:35,007 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 [2021-06-12 21:32:35,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:35,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:35,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:35,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-06-12 21:32:35,033 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:35,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345475318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:35,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:35,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-06-12 21:32:35,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072447272] [2021-06-12 21:32:35,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:35,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:35,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:35,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:35,034 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) [2021-06-12 21:32:36,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:36,234 INFO L93 Difference]: Finished difference Result 1252 states and 3057 transitions. [2021-06-12 21:32:36,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:32:36,235 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 [2021-06-12 21:32:36,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:36,237 INFO L225 Difference]: With dead ends: 1252 [2021-06-12 21:32:36,237 INFO L226 Difference]: Without dead ends: 1245 [2021-06-12 21:32:36,238 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1119.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:32:36,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-12 21:32:36,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 1121. [2021-06-12 21:32:36,253 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) [2021-06-12 21:32:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 2801 transitions. [2021-06-12 21:32:36,255 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 2801 transitions. Word has length 26 [2021-06-12 21:32:36,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:36,257 INFO L482 AbstractCegarLoop]: Abstraction has 1121 states and 2801 transitions. [2021-06-12 21:32:36,257 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) [2021-06-12 21:32:36,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 2801 transitions. [2021-06-12 21:32:36,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:36,259 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:36,259 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:36,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:36,481 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:36,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:36,481 INFO L82 PathProgramCache]: Analyzing trace with hash -197112851, now seen corresponding path program 39 times [2021-06-12 21:32:36,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:36,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058968170] [2021-06-12 21:32:36,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:36,573 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:36,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:36,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058968170] [2021-06-12 21:32:36,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058968170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:36,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985792451] [2021-06-12 21:32:36,574 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 [2021-06-12 21:32:36,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:32:36,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:36,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:36,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:36,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985792451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:36,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:36,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-12 21:32:36,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924388530] [2021-06-12 21:32:36,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:32:36,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:36,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:32:36,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:32:36,792 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) [2021-06-12 21:32:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:37,495 INFO L93 Difference]: Finished difference Result 1649 states and 3850 transitions. [2021-06-12 21:32:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:32:37,495 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 [2021-06-12 21:32:37,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:37,498 INFO L225 Difference]: With dead ends: 1649 [2021-06-12 21:32:37,498 INFO L226 Difference]: Without dead ends: 1649 [2021-06-12 21:32:37,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 676.9ms TimeCoverageRelationStatistics Valid=772, Invalid=2090, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:32:37,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1649 states. [2021-06-12 21:32:37,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1649 to 1078. [2021-06-12 21:32:37,510 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) [2021-06-12 21:32:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1078 states to 1078 states and 2696 transitions. [2021-06-12 21:32:37,511 INFO L78 Accepts]: Start accepts. Automaton has 1078 states and 2696 transitions. Word has length 28 [2021-06-12 21:32:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:37,512 INFO L482 AbstractCegarLoop]: Abstraction has 1078 states and 2696 transitions. [2021-06-12 21:32:37,512 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) [2021-06-12 21:32:37,512 INFO L276 IsEmpty]: Start isEmpty. Operand 1078 states and 2696 transitions. [2021-06-12 21:32:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:37,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:37,513 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:37,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:37,723 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:37,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:37,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1535197913, now seen corresponding path program 40 times [2021-06-12 21:32:37,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:37,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103859122] [2021-06-12 21:32:37,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:37,785 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:37,785 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:37,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103859122] [2021-06-12 21:32:37,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103859122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:37,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466608417] [2021-06-12 21:32:37,786 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 [2021-06-12 21:32:37,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:37,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:37,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:37,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:37,964 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:37,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466608417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:37,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:37,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:37,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669598839] [2021-06-12 21:32:37,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:37,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:37,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:37,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:37,965 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) [2021-06-12 21:32:38,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:38,878 INFO L93 Difference]: Finished difference Result 2079 states and 4782 transitions. [2021-06-12 21:32:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:32:38,880 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 [2021-06-12 21:32:38,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:38,883 INFO L225 Difference]: With dead ends: 2079 [2021-06-12 21:32:38,883 INFO L226 Difference]: Without dead ends: 2008 [2021-06-12 21:32:38,884 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 855.0ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:32:38,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2021-06-12 21:32:38,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1257. [2021-06-12 21:32:38,908 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) [2021-06-12 21:32:38,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1257 states to 1257 states and 3165 transitions. [2021-06-12 21:32:38,911 INFO L78 Accepts]: Start accepts. Automaton has 1257 states and 3165 transitions. Word has length 28 [2021-06-12 21:32:38,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:38,911 INFO L482 AbstractCegarLoop]: Abstraction has 1257 states and 3165 transitions. [2021-06-12 21:32:38,911 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) [2021-06-12 21:32:38,911 INFO L276 IsEmpty]: Start isEmpty. Operand 1257 states and 3165 transitions. [2021-06-12 21:32:38,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:38,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:38,913 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:39,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-06-12 21:32:39,137 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1640834073, now seen corresponding path program 41 times [2021-06-12 21:32:39,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:39,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094791455] [2021-06-12 21:32:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:39,189 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:39,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:39,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094791455] [2021-06-12 21:32:39,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094791455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:39,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011100821] [2021-06-12 21:32:39,190 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 [2021-06-12 21:32:39,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:32:39,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:39,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:39,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:39,373 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:39,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011100821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:39,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:39,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-12 21:32:39,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690138965] [2021-06-12 21:32:39,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:32:39,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:39,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:32:39,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:39,375 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) [2021-06-12 21:32:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:40,149 INFO L93 Difference]: Finished difference Result 2322 states and 5582 transitions. [2021-06-12 21:32:40,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:32:40,150 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 [2021-06-12 21:32:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:40,156 INFO L225 Difference]: With dead ends: 2322 [2021-06-12 21:32:40,156 INFO L226 Difference]: Without dead ends: 2316 [2021-06-12 21:32:40,157 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 694.9ms TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:32:40,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2316 states. [2021-06-12 21:32:40,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2316 to 1546. [2021-06-12 21:32:40,181 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) [2021-06-12 21:32:40,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 3920 transitions. [2021-06-12 21:32:40,185 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 3920 transitions. Word has length 28 [2021-06-12 21:32:40,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:40,185 INFO L482 AbstractCegarLoop]: Abstraction has 1546 states and 3920 transitions. [2021-06-12 21:32:40,185 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) [2021-06-12 21:32:40,185 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 3920 transitions. [2021-06-12 21:32:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:40,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:40,187 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:40,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:40,410 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:40,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:40,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1972512861, now seen corresponding path program 42 times [2021-06-12 21:32:40,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:40,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997611912] [2021-06-12 21:32:40,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:40,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:40,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997611912] [2021-06-12 21:32:40,463 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997611912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:40,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103404666] [2021-06-12 21:32:40,463 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 [2021-06-12 21:32:40,492 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:32:40,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:40,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:40,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:40,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103404666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:40,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:40,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-12 21:32:40,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5850911] [2021-06-12 21:32:40,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:32:40,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:40,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:32:40,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:40,658 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) [2021-06-12 21:32:41,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:41,326 INFO L93 Difference]: Finished difference Result 1833 states and 4458 transitions. [2021-06-12 21:32:41,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:32:41,327 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 [2021-06-12 21:32:41,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:41,330 INFO L225 Difference]: With dead ends: 1833 [2021-06-12 21:32:41,330 INFO L226 Difference]: Without dead ends: 1829 [2021-06-12 21:32:41,331 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 640.0ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:32:41,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2021-06-12 21:32:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1518. [2021-06-12 21:32:41,356 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) [2021-06-12 21:32:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 3852 transitions. [2021-06-12 21:32:41,359 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 3852 transitions. Word has length 28 [2021-06-12 21:32:41,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:41,360 INFO L482 AbstractCegarLoop]: Abstraction has 1518 states and 3852 transitions. [2021-06-12 21:32:41,360 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) [2021-06-12 21:32:41,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 3852 transitions. [2021-06-12 21:32:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:41,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:41,362 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:41,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:41,577 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:41,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:41,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1204854355, now seen corresponding path program 43 times [2021-06-12 21:32:41,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:41,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23027043] [2021-06-12 21:32:41,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:41,624 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:41,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:41,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23027043] [2021-06-12 21:32:41,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23027043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:41,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674853708] [2021-06-12 21:32:41,625 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 [2021-06-12 21:32:41,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:41,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:41,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:41,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:41,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674853708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:41,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:41,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-12 21:32:41,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891950141] [2021-06-12 21:32:41,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:32:41,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:41,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:32:41,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:41,797 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) [2021-06-12 21:32:42,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:42,324 INFO L93 Difference]: Finished difference Result 2126 states and 5176 transitions. [2021-06-12 21:32:42,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 21:32:42,325 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 [2021-06-12 21:32:42,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:42,328 INFO L225 Difference]: With dead ends: 2126 [2021-06-12 21:32:42,328 INFO L226 Difference]: Without dead ends: 2117 [2021-06-12 21:32:42,329 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 450.9ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 21:32:42,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2117 states. [2021-06-12 21:32:42,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2117 to 1623. [2021-06-12 21:32:42,356 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) [2021-06-12 21:32:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1623 states to 1623 states and 4141 transitions. [2021-06-12 21:32:42,359 INFO L78 Accepts]: Start accepts. Automaton has 1623 states and 4141 transitions. Word has length 28 [2021-06-12 21:32:42,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:42,359 INFO L482 AbstractCegarLoop]: Abstraction has 1623 states and 4141 transitions. [2021-06-12 21:32:42,359 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) [2021-06-12 21:32:42,359 INFO L276 IsEmpty]: Start isEmpty. Operand 1623 states and 4141 transitions. [2021-06-12 21:32:42,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:42,361 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:42,361 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:42,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-12 21:32:42,583 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:42,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:42,584 INFO L82 PathProgramCache]: Analyzing trace with hash -760321333, now seen corresponding path program 44 times [2021-06-12 21:32:42,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:42,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227851112] [2021-06-12 21:32:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:42,639 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:42,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:42,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227851112] [2021-06-12 21:32:42,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227851112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:42,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533913641] [2021-06-12 21:32:42,640 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 [2021-06-12 21:32:42,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:42,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:42,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:42,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:42,827 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:42,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533913641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:42,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:42,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-12 21:32:42,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97732337] [2021-06-12 21:32:42,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:42,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:42,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:42,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:42,833 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) [2021-06-12 21:32:43,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:43,482 INFO L93 Difference]: Finished difference Result 2217 states and 5362 transitions. [2021-06-12 21:32:43,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:32:43,482 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 [2021-06-12 21:32:43,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:43,484 INFO L225 Difference]: With dead ends: 2217 [2021-06-12 21:32:43,484 INFO L226 Difference]: Without dead ends: 2207 [2021-06-12 21:32:43,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 599.0ms TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:32:43,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-06-12 21:32:43,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 1676. [2021-06-12 21:32:43,507 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) [2021-06-12 21:32:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 4294 transitions. [2021-06-12 21:32:43,510 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 4294 transitions. Word has length 28 [2021-06-12 21:32:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:43,510 INFO L482 AbstractCegarLoop]: Abstraction has 1676 states and 4294 transitions. [2021-06-12 21:32:43,510 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) [2021-06-12 21:32:43,510 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 4294 transitions. [2021-06-12 21:32:43,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:43,512 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:43,512 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:43,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-12 21:32:43,729 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:43,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:43,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1047790539, now seen corresponding path program 45 times [2021-06-12 21:32:43,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:43,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503118868] [2021-06-12 21:32:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:43,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:43,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503118868] [2021-06-12 21:32:43,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503118868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:43,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647871069] [2021-06-12 21:32:43,799 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 [2021-06-12 21:32:43,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:32:43,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:43,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:43,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:44,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647871069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:44,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:44,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 21:32:44,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44908583] [2021-06-12 21:32:44,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:44,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:44,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:44,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:44,009 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) [2021-06-12 21:32:44,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:44,684 INFO L93 Difference]: Finished difference Result 2439 states and 5889 transitions. [2021-06-12 21:32:44,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:32:44,685 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 [2021-06-12 21:32:44,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:44,687 INFO L225 Difference]: With dead ends: 2439 [2021-06-12 21:32:44,687 INFO L226 Difference]: Without dead ends: 2417 [2021-06-12 21:32:44,687 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 647.5ms TimeCoverageRelationStatistics Valid=724, Invalid=2246, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:32:44,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-06-12 21:32:44,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 1598. [2021-06-12 21:32:44,714 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) [2021-06-12 21:32:44,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1598 states to 1598 states and 4074 transitions. [2021-06-12 21:32:44,717 INFO L78 Accepts]: Start accepts. Automaton has 1598 states and 4074 transitions. Word has length 28 [2021-06-12 21:32:44,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:44,717 INFO L482 AbstractCegarLoop]: Abstraction has 1598 states and 4074 transitions. [2021-06-12 21:32:44,717 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) [2021-06-12 21:32:44,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1598 states and 4074 transitions. [2021-06-12 21:32:44,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:44,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:44,719 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:44,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 21:32:44,942 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash -2093633671, now seen corresponding path program 46 times [2021-06-12 21:32:44,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:44,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785547539] [2021-06-12 21:32:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:45,017 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:45,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:45,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785547539] [2021-06-12 21:32:45,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785547539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:45,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535317320] [2021-06-12 21:32:45,018 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 [2021-06-12 21:32:45,049 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:45,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:45,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:45,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:45,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535317320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:45,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:45,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:45,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57238932] [2021-06-12 21:32:45,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:45,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:45,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:45,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:45,223 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) [2021-06-12 21:32:45,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:45,954 INFO L93 Difference]: Finished difference Result 2405 states and 5659 transitions. [2021-06-12 21:32:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 21:32:45,954 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 [2021-06-12 21:32:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:45,956 INFO L225 Difference]: With dead ends: 2405 [2021-06-12 21:32:45,956 INFO L226 Difference]: Without dead ends: 2405 [2021-06-12 21:32:45,956 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 684.5ms TimeCoverageRelationStatistics Valid=765, Invalid=2097, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:32:45,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-12 21:32:45,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1388. [2021-06-12 21:32:45,971 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) [2021-06-12 21:32:45,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1388 states to 1388 states and 3481 transitions. [2021-06-12 21:32:45,973 INFO L78 Accepts]: Start accepts. Automaton has 1388 states and 3481 transitions. Word has length 28 [2021-06-12 21:32:45,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:45,973 INFO L482 AbstractCegarLoop]: Abstraction has 1388 states and 3481 transitions. [2021-06-12 21:32:45,973 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) [2021-06-12 21:32:45,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1388 states and 3481 transitions. [2021-06-12 21:32:45,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:45,975 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:45,975 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:46,175 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:46,175 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1416205117, now seen corresponding path program 47 times [2021-06-12 21:32:46,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:46,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187322917] [2021-06-12 21:32:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:46,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:46,234 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:46,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:46,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187322917] [2021-06-12 21:32:46,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187322917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:46,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636248138] [2021-06-12 21:32:46,234 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 [2021-06-12 21:32:46,262 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 21:32:46,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:46,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:46,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:46,414 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:46,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636248138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:46,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:46,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 21:32:46,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529470260] [2021-06-12 21:32:46,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:46,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:46,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:46,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:46,415 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) [2021-06-12 21:32:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:47,056 INFO L93 Difference]: Finished difference Result 1806 states and 4238 transitions. [2021-06-12 21:32:47,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:32:47,056 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 [2021-06-12 21:32:47,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:47,058 INFO L225 Difference]: With dead ends: 1806 [2021-06-12 21:32:47,058 INFO L226 Difference]: Without dead ends: 1767 [2021-06-12 21:32:47,058 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:32:47,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1767 states. [2021-06-12 21:32:47,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1767 to 1334. [2021-06-12 21:32:47,070 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) [2021-06-12 21:32:47,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1334 states to 1334 states and 3327 transitions. [2021-06-12 21:32:47,072 INFO L78 Accepts]: Start accepts. Automaton has 1334 states and 3327 transitions. Word has length 28 [2021-06-12 21:32:47,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:47,072 INFO L482 AbstractCegarLoop]: Abstraction has 1334 states and 3327 transitions. [2021-06-12 21:32:47,072 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) [2021-06-12 21:32:47,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1334 states and 3327 transitions. [2021-06-12 21:32:47,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:47,073 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:47,074 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:47,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:47,274 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:47,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:47,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1362767239, now seen corresponding path program 48 times [2021-06-12 21:32:47,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:47,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524998956] [2021-06-12 21:32:47,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:47,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:47,339 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:47,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:47,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524998956] [2021-06-12 21:32:47,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524998956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:47,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266123284] [2021-06-12 21:32:47,339 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 [2021-06-12 21:32:47,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:32:47,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:47,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:47,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:47,564 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:47,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266123284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:47,565 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:47,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 21:32:47,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164275641] [2021-06-12 21:32:47,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:47,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:47,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:47,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:47,566 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) [2021-06-12 21:32:48,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:48,335 INFO L93 Difference]: Finished difference Result 2351 states and 5515 transitions. [2021-06-12 21:32:48,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:32:48,336 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 [2021-06-12 21:32:48,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:48,338 INFO L225 Difference]: With dead ends: 2351 [2021-06-12 21:32:48,338 INFO L226 Difference]: Without dead ends: 2351 [2021-06-12 21:32:48,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 708.6ms TimeCoverageRelationStatistics Valid=892, Invalid=2300, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:32:48,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2351 states. [2021-06-12 21:32:48,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2351 to 1439. [2021-06-12 21:32:48,354 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) [2021-06-12 21:32:48,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 3554 transitions. [2021-06-12 21:32:48,355 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 3554 transitions. Word has length 28 [2021-06-12 21:32:48,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:48,355 INFO L482 AbstractCegarLoop]: Abstraction has 1439 states and 3554 transitions. [2021-06-12 21:32:48,355 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) [2021-06-12 21:32:48,356 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 3554 transitions. [2021-06-12 21:32:48,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:48,357 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:48,357 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:48,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:48,557 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:48,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:48,558 INFO L82 PathProgramCache]: Analyzing trace with hash -452605191, now seen corresponding path program 49 times [2021-06-12 21:32:48,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:48,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051606872] [2021-06-12 21:32:48,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:48,612 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:48,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:48,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051606872] [2021-06-12 21:32:48,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051606872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:48,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458302074] [2021-06-12 21:32:48,613 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 [2021-06-12 21:32:48,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:48,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:48,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:48,805 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:48,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458302074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:48,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:48,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-12 21:32:48,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034003279] [2021-06-12 21:32:48,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:48,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:48,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:48,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:48,806 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) [2021-06-12 21:32:49,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:49,425 INFO L93 Difference]: Finished difference Result 1783 states and 4197 transitions. [2021-06-12 21:32:49,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:32:49,426 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 [2021-06-12 21:32:49,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:49,427 INFO L225 Difference]: With dead ends: 1783 [2021-06-12 21:32:49,427 INFO L226 Difference]: Without dead ends: 1765 [2021-06-12 21:32:49,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=519, Invalid=1737, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:32:49,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2021-06-12 21:32:49,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 1470. [2021-06-12 21:32:49,441 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) [2021-06-12 21:32:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 3636 transitions. [2021-06-12 21:32:49,443 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 3636 transitions. Word has length 28 [2021-06-12 21:32:49,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:49,443 INFO L482 AbstractCegarLoop]: Abstraction has 1470 states and 3636 transitions. [2021-06-12 21:32:49,443 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) [2021-06-12 21:32:49,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 3636 transitions. [2021-06-12 21:32:49,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:49,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:49,445 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:49,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:49,645 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:49,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:49,645 INFO L82 PathProgramCache]: Analyzing trace with hash 983607605, now seen corresponding path program 50 times [2021-06-12 21:32:49,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:49,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258536868] [2021-06-12 21:32:49,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:49,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:49,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:49,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258536868] [2021-06-12 21:32:49,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258536868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:49,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40213829] [2021-06-12 21:32:49,717 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 [2021-06-12 21:32:49,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:49,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:49,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:49,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40213829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:49,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:49,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-12 21:32:49,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996240698] [2021-06-12 21:32:49,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:49,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:49,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:49,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:49,902 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) [2021-06-12 21:32:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:50,803 INFO L93 Difference]: Finished difference Result 2870 states and 6981 transitions. [2021-06-12 21:32:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:32:50,804 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 [2021-06-12 21:32:50,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:50,806 INFO L225 Difference]: With dead ends: 2870 [2021-06-12 21:32:50,806 INFO L226 Difference]: Without dead ends: 2870 [2021-06-12 21:32:50,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 831.6ms TimeCoverageRelationStatistics Valid=1080, Invalid=2580, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:32:50,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2870 states. [2021-06-12 21:32:50,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2870 to 2266. [2021-06-12 21:32:50,832 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) [2021-06-12 21:32:50,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2266 states to 2266 states and 5782 transitions. [2021-06-12 21:32:50,834 INFO L78 Accepts]: Start accepts. Automaton has 2266 states and 5782 transitions. Word has length 28 [2021-06-12 21:32:50,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:50,834 INFO L482 AbstractCegarLoop]: Abstraction has 2266 states and 5782 transitions. [2021-06-12 21:32:50,835 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) [2021-06-12 21:32:50,835 INFO L276 IsEmpty]: Start isEmpty. Operand 2266 states and 5782 transitions. [2021-06-12 21:32:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:50,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:50,837 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:51,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-06-12 21:32:51,037 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:51,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash -768473619, now seen corresponding path program 51 times [2021-06-12 21:32:51,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:51,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837341114] [2021-06-12 21:32:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:51,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:51,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837341114] [2021-06-12 21:32:51,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837341114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:51,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631626499] [2021-06-12 21:32:51,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:32:51,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:32:51,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:51,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:51,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:51,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631626499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:51,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:51,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-12 21:32:51,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791892489] [2021-06-12 21:32:51,279 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 21:32:51,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:51,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 21:32:51,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-12 21:32:51,279 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) [2021-06-12 21:32:51,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:51,833 INFO L93 Difference]: Finished difference Result 2793 states and 6806 transitions. [2021-06-12 21:32:51,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:32:51,834 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 [2021-06-12 21:32:51,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:51,836 INFO L225 Difference]: With dead ends: 2793 [2021-06-12 21:32:51,836 INFO L226 Difference]: Without dead ends: 2789 [2021-06-12 21:32:51,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 501.7ms TimeCoverageRelationStatistics Valid=634, Invalid=1622, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:32:51,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2789 states. [2021-06-12 21:32:51,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2789 to 2240. [2021-06-12 21:32:51,868 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) [2021-06-12 21:32:51,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2240 states to 2240 states and 5710 transitions. [2021-06-12 21:32:51,871 INFO L78 Accepts]: Start accepts. Automaton has 2240 states and 5710 transitions. Word has length 28 [2021-06-12 21:32:51,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:51,871 INFO L482 AbstractCegarLoop]: Abstraction has 2240 states and 5710 transitions. [2021-06-12 21:32:51,871 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) [2021-06-12 21:32:51,871 INFO L276 IsEmpty]: Start isEmpty. Operand 2240 states and 5710 transitions. [2021-06-12 21:32:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:51,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:51,873 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:52,074 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:52,074 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:52,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:52,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1274819885, now seen corresponding path program 52 times [2021-06-12 21:32:52,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:52,075 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391104026] [2021-06-12 21:32:52,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:52,132 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:52,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:52,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391104026] [2021-06-12 21:32:52,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391104026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:52,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81824475] [2021-06-12 21:32:52,133 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 [2021-06-12 21:32:52,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:32:52,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:52,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:52,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:52,324 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:52,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81824475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:52,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:52,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-06-12 21:32:52,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59885394] [2021-06-12 21:32:52,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 21:32:52,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:52,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 21:32:52,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-12 21:32:52,325 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) [2021-06-12 21:32:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:52,885 INFO L93 Difference]: Finished difference Result 2987 states and 7280 transitions. [2021-06-12 21:32:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:32:52,886 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 [2021-06-12 21:32:52,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:52,888 INFO L225 Difference]: With dead ends: 2987 [2021-06-12 21:32:52,888 INFO L226 Difference]: Without dead ends: 2975 [2021-06-12 21:32:52,889 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:32:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-06-12 21:32:52,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2400. [2021-06-12 21:32:52,914 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) [2021-06-12 21:32:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2400 states to 2400 states and 6154 transitions. [2021-06-12 21:32:52,918 INFO L78 Accepts]: Start accepts. Automaton has 2400 states and 6154 transitions. Word has length 28 [2021-06-12 21:32:52,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:52,918 INFO L482 AbstractCegarLoop]: Abstraction has 2400 states and 6154 transitions. [2021-06-12 21:32:52,918 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) [2021-06-12 21:32:52,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2400 states and 6154 transitions. [2021-06-12 21:32:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:52,922 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:52,922 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:53,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-12 21:32:53,137 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:53,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1502041265, now seen corresponding path program 53 times [2021-06-12 21:32:53,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:53,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546044785] [2021-06-12 21:32:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:53,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:32:53,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:53,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546044785] [2021-06-12 21:32:53,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546044785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:53,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190679982] [2021-06-12 21:32:53,199 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 [2021-06-12 21:32:53,228 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:32:53,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:53,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:53,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:53,392 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:53,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190679982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:53,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:53,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-06-12 21:32:53,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739472345] [2021-06-12 21:32:53,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 21:32:53,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:53,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 21:32:53,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-06-12 21:32:53,393 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) [2021-06-12 21:32:54,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:54,164 INFO L93 Difference]: Finished difference Result 3282 states and 8012 transitions. [2021-06-12 21:32:54,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:32:54,164 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 [2021-06-12 21:32:54,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:54,167 INFO L225 Difference]: With dead ends: 3282 [2021-06-12 21:32:54,167 INFO L226 Difference]: Without dead ends: 3262 [2021-06-12 21:32:54,168 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 719.2ms TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:32:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3262 states. [2021-06-12 21:32:54,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3262 to 2627. [2021-06-12 21:32:54,197 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) [2021-06-12 21:32:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2627 states to 2627 states and 6772 transitions. [2021-06-12 21:32:54,200 INFO L78 Accepts]: Start accepts. Automaton has 2627 states and 6772 transitions. Word has length 28 [2021-06-12 21:32:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:54,200 INFO L482 AbstractCegarLoop]: Abstraction has 2627 states and 6772 transitions. [2021-06-12 21:32:54,201 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) [2021-06-12 21:32:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 2627 states and 6772 transitions. [2021-06-12 21:32:54,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-12 21:32:54,203 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:54,203 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:54,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-12 21:32:54,404 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:54,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:54,404 INFO L82 PathProgramCache]: Analyzing trace with hash -818455349, now seen corresponding path program 54 times [2021-06-12 21:32:54,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:54,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263229180] [2021-06-12 21:32:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:54,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:54,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:54,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263229180] [2021-06-12 21:32:54,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263229180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:54,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216983174] [2021-06-12 21:32:54,482 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 [2021-06-12 21:32:54,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:32:54,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:54,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 21:32:54,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:54,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216983174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:54,701 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:54,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-12 21:32:54,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840792893] [2021-06-12 21:32:54,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:32:54,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:54,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:32:54,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:32:54,702 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) [2021-06-12 21:32:55,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:55,459 INFO L93 Difference]: Finished difference Result 3390 states and 8366 transitions. [2021-06-12 21:32:55,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:32:55,461 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 [2021-06-12 21:32:55,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:55,465 INFO L225 Difference]: With dead ends: 3390 [2021-06-12 21:32:55,465 INFO L226 Difference]: Without dead ends: 3362 [2021-06-12 21:32:55,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=778, Invalid=2414, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:32:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3362 states. [2021-06-12 21:32:55,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3362 to 2800. [2021-06-12 21:32:55,499 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) [2021-06-12 21:32:55,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2800 states to 2800 states and 7239 transitions. [2021-06-12 21:32:55,503 INFO L78 Accepts]: Start accepts. Automaton has 2800 states and 7239 transitions. Word has length 28 [2021-06-12 21:32:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:55,503 INFO L482 AbstractCegarLoop]: Abstraction has 2800 states and 7239 transitions. [2021-06-12 21:32:55,503 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) [2021-06-12 21:32:55,503 INFO L276 IsEmpty]: Start isEmpty. Operand 2800 states and 7239 transitions. [2021-06-12 21:32:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:32:55,506 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:55,506 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:55,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:55,718 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:55,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:55,718 INFO L82 PathProgramCache]: Analyzing trace with hash -40043611, now seen corresponding path program 55 times [2021-06-12 21:32:55,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:55,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246164068] [2021-06-12 21:32:55,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:55,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:56,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:56,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246164068] [2021-06-12 21:32:56,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246164068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:56,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492167442] [2021-06-12 21:32:56,024 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 [2021-06-12 21:32:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:56,048 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:32:56,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:56,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:56,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:56,349 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:56,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:56,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:56,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:56,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:56,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:56,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:56,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:56,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:56,355 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 [2021-06-12 21:32:56,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:56,360 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:56,361 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:56,361 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:32:56,379 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:56,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492167442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:56,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:56,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-12 21:32:56,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030501049] [2021-06-12 21:32:56,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:32:56,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:56,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:32:56,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:56,380 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) [2021-06-12 21:32:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:32:58,115 INFO L93 Difference]: Finished difference Result 3814 states and 9580 transitions. [2021-06-12 21:32:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:32:58,116 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 [2021-06-12 21:32:58,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:32:58,120 INFO L225 Difference]: With dead ends: 3814 [2021-06-12 21:32:58,120 INFO L226 Difference]: Without dead ends: 3807 [2021-06-12 21:32:58,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1590.1ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:32:58,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-12 21:32:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 2859. [2021-06-12 21:32:58,161 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) [2021-06-12 21:32:58,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 7396 transitions. [2021-06-12 21:32:58,167 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 7396 transitions. Word has length 30 [2021-06-12 21:32:58,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:32:58,168 INFO L482 AbstractCegarLoop]: Abstraction has 2859 states and 7396 transitions. [2021-06-12 21:32:58,168 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) [2021-06-12 21:32:58,168 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 7396 transitions. [2021-06-12 21:32:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:32:58,172 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:32:58,172 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:32:58,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-12 21:32:58,394 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:32:58,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:32:58,394 INFO L82 PathProgramCache]: Analyzing trace with hash -476580429, now seen corresponding path program 56 times [2021-06-12 21:32:58,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:32:58,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293490505] [2021-06-12 21:32:58,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:32:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:32:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:58,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:32:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293490505] [2021-06-12 21:32:58,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293490505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:58,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020676790] [2021-06-12 21:32:58,764 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) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:32:58,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:32:58,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:32:58,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:32:58,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:32:59,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:59,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:59,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:59,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:59,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:59,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:59,074 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:59,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:59,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:59,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:32:59,077 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:59,078 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:32:59,079 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 [2021-06-12 21:32:59,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:32:59,085 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:32:59,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:32:59,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:32:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:32:59,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020676790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:32:59,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:32:59,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-12 21:32:59,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616535679] [2021-06-12 21:32:59,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:32:59,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:32:59,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:32:59,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:32:59,104 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) [2021-06-12 21:33:00,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:00,474 INFO L93 Difference]: Finished difference Result 3790 states and 9553 transitions. [2021-06-12 21:33:00,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:33:00,474 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 [2021-06-12 21:33:00,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:00,478 INFO L225 Difference]: With dead ends: 3790 [2021-06-12 21:33:00,478 INFO L226 Difference]: Without dead ends: 3739 [2021-06-12 21:33:00,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1432.9ms TimeCoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 21:33:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-12 21:33:00,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 2912. [2021-06-12 21:33:00,509 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) [2021-06-12 21:33:00,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2912 states to 2912 states and 7503 transitions. [2021-06-12 21:33:00,513 INFO L78 Accepts]: Start accepts. Automaton has 2912 states and 7503 transitions. Word has length 30 [2021-06-12 21:33:00,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:00,513 INFO L482 AbstractCegarLoop]: Abstraction has 2912 states and 7503 transitions. [2021-06-12 21:33:00,513 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) [2021-06-12 21:33:00,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2912 states and 7503 transitions. [2021-06-12 21:33:00,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:00,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:00,516 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:00,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:00,717 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:00,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:00,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1012771695, now seen corresponding path program 57 times [2021-06-12 21:33:00,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:00,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929360076] [2021-06-12 21:33:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:01,028 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:01,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:01,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929360076] [2021-06-12 21:33:01,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929360076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:01,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029271394] [2021-06-12 21:33:01,028 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 [2021-06-12 21:33:01,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:33:01,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:01,053 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 21:33:01,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:01,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:01,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:01,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:01,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:01,614 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:01,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:01,654 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 [2021-06-12 21:33:02,130 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-06-12 21:33:02,227 INFO L628 ElimStorePlain]: treesize reduction 286, result has 10.9 percent of original size [2021-06-12 21:33:02,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:33:02,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:22 [2021-06-12 21:33:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:02,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029271394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:02,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:02,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-12 21:33:02,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091401649] [2021-06-12 21:33:02,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:33:02,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:02,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:33:02,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:33:02,316 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) [2021-06-12 21:33:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:04,140 INFO L93 Difference]: Finished difference Result 3918 states and 9829 transitions. [2021-06-12 21:33:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:33:04,140 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 [2021-06-12 21:33:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:04,144 INFO L225 Difference]: With dead ends: 3918 [2021-06-12 21:33:04,144 INFO L226 Difference]: Without dead ends: 3872 [2021-06-12 21:33:04,146 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 1806.6ms TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:33:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3872 states. [2021-06-12 21:33:04,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3872 to 2956. [2021-06-12 21:33:04,176 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) [2021-06-12 21:33:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2956 states to 2956 states and 7601 transitions. [2021-06-12 21:33:04,180 INFO L78 Accepts]: Start accepts. Automaton has 2956 states and 7601 transitions. Word has length 30 [2021-06-12 21:33:04,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:04,180 INFO L482 AbstractCegarLoop]: Abstraction has 2956 states and 7601 transitions. [2021-06-12 21:33:04,180 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) [2021-06-12 21:33:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 2956 states and 7601 transitions. [2021-06-12 21:33:04,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:04,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:04,183 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:04,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-06-12 21:33:04,383 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:04,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:04,384 INFO L82 PathProgramCache]: Analyzing trace with hash 290299947, now seen corresponding path program 58 times [2021-06-12 21:33:04,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:04,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059866949] [2021-06-12 21:33:04,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:04,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:04,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059866949] [2021-06-12 21:33:04,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059866949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:04,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636140373] [2021-06-12 21:33:04,674 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 [2021-06-12 21:33:04,697 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:04,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:04,698 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:04,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:04,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:04,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:04,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:04,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:04,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:04,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:04,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:04,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:04,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:04,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:04,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:04,953 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 [2021-06-12 21:33:04,953 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:04,958 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:04,959 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:04,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:04,977 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:04,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636140373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:04,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:04,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-12 21:33:04,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895601550] [2021-06-12 21:33:04,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:04,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:04,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:04,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:04,978 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) [2021-06-12 21:33:06,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:06,463 INFO L93 Difference]: Finished difference Result 4132 states and 10315 transitions. [2021-06-12 21:33:06,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:33:06,464 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 [2021-06-12 21:33:06,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:06,467 INFO L225 Difference]: With dead ends: 4132 [2021-06-12 21:33:06,467 INFO L226 Difference]: Without dead ends: 4099 [2021-06-12 21:33:06,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1430.4ms TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:33:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-06-12 21:33:06,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3044. [2021-06-12 21:33:06,499 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) [2021-06-12 21:33:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3044 states to 3044 states and 7798 transitions. [2021-06-12 21:33:06,504 INFO L78 Accepts]: Start accepts. Automaton has 3044 states and 7798 transitions. Word has length 30 [2021-06-12 21:33:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:06,504 INFO L482 AbstractCegarLoop]: Abstraction has 3044 states and 7798 transitions. [2021-06-12 21:33:06,505 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) [2021-06-12 21:33:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 3044 states and 7798 transitions. [2021-06-12 21:33:06,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:06,509 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:06,509 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:06,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:06,725 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:06,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1779723289, now seen corresponding path program 59 times [2021-06-12 21:33:06,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:06,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545850371] [2021-06-12 21:33:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:06,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:07,052 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:07,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545850371] [2021-06-12 21:33:07,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545850371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:07,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049606415] [2021-06-12 21:33:07,053 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 [2021-06-12 21:33:07,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:33:07,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:07,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:07,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:07,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:07,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:07,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:07,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:07,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:07,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:07,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:07,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:07,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:07,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:07,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:07,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:07,319 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:07,320 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 [2021-06-12 21:33:07,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:07,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:07,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:07,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:07,346 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:07,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049606415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:07,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:07,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-12 21:33:07,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714792889] [2021-06-12 21:33:07,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:07,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:07,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:07,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:07,347 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) [2021-06-12 21:33:09,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:09,205 INFO L93 Difference]: Finished difference Result 4375 states and 10858 transitions. [2021-06-12 21:33:09,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:33:09,206 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 [2021-06-12 21:33:09,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:09,210 INFO L225 Difference]: With dead ends: 4375 [2021-06-12 21:33:09,211 INFO L226 Difference]: Without dead ends: 4366 [2021-06-12 21:33:09,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 1789.8ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 21:33:09,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-06-12 21:33:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3065. [2021-06-12 21:33:09,250 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) [2021-06-12 21:33:09,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3065 states to 3065 states and 7869 transitions. [2021-06-12 21:33:09,254 INFO L78 Accepts]: Start accepts. Automaton has 3065 states and 7869 transitions. Word has length 30 [2021-06-12 21:33:09,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:09,254 INFO L482 AbstractCegarLoop]: Abstraction has 3065 states and 7869 transitions. [2021-06-12 21:33:09,254 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) [2021-06-12 21:33:09,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3065 states and 7869 transitions. [2021-06-12 21:33:09,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:09,258 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:09,258 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:09,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:09,458 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:09,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:09,459 INFO L82 PathProgramCache]: Analyzing trace with hash -110703891, now seen corresponding path program 60 times [2021-06-12 21:33:09,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:09,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511244438] [2021-06-12 21:33:09,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:09,740 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:09,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511244438] [2021-06-12 21:33:09,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511244438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:09,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967464416] [2021-06-12 21:33:09,740 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 [2021-06-12 21:33:09,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:33:09,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:09,765 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:09,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:10,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,026 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:10,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:10,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:10,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:10,033 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:10,034 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 [2021-06-12 21:33:10,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:10,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:10,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:10,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:10,058 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:10,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967464416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:10,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:10,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:33:10,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586295745] [2021-06-12 21:33:10,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:33:10,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:10,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:33:10,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:10,059 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) [2021-06-12 21:33:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:11,729 INFO L93 Difference]: Finished difference Result 4391 states and 10936 transitions. [2021-06-12 21:33:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 21:33:11,729 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 [2021-06-12 21:33:11,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:11,733 INFO L225 Difference]: With dead ends: 4391 [2021-06-12 21:33:11,733 INFO L226 Difference]: Without dead ends: 4352 [2021-06-12 21:33:11,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1528.0ms TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:33:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-06-12 21:33:11,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3212. [2021-06-12 21:33:11,767 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) [2021-06-12 21:33:11,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3212 states to 3212 states and 8214 transitions. [2021-06-12 21:33:11,771 INFO L78 Accepts]: Start accepts. Automaton has 3212 states and 8214 transitions. Word has length 30 [2021-06-12 21:33:11,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:11,771 INFO L482 AbstractCegarLoop]: Abstraction has 3212 states and 8214 transitions. [2021-06-12 21:33:11,771 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) [2021-06-12 21:33:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3212 states and 8214 transitions. [2021-06-12 21:33:11,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:11,774 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:11,774 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:11,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:11,975 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:11,975 INFO L82 PathProgramCache]: Analyzing trace with hash -416965491, now seen corresponding path program 61 times [2021-06-12 21:33:11,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:11,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488480936] [2021-06-12 21:33:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:12,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:12,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488480936] [2021-06-12 21:33:12,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488480936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:12,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589514648] [2021-06-12 21:33:12,234 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 [2021-06-12 21:33:12,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:12,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:12,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:12,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:12,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:12,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:12,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:12,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:12,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:12,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:12,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:12,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:12,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:12,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:12,509 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 [2021-06-12 21:33:12,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:12,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:12,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:12,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:12,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589514648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:12,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:12,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:33:12,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751302367] [2021-06-12 21:33:12,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:12,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:12,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:12,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:12,535 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) [2021-06-12 21:33:14,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:14,141 INFO L93 Difference]: Finished difference Result 3557 states and 8936 transitions. [2021-06-12 21:33:14,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:33:14,142 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 [2021-06-12 21:33:14,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:14,145 INFO L225 Difference]: With dead ends: 3557 [2021-06-12 21:33:14,145 INFO L226 Difference]: Without dead ends: 3530 [2021-06-12 21:33:14,145 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1461.7ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:33:14,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3530 states. [2021-06-12 21:33:14,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3530 to 3247. [2021-06-12 21:33:14,173 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) [2021-06-12 21:33:14,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3247 states to 3247 states and 8285 transitions. [2021-06-12 21:33:14,177 INFO L78 Accepts]: Start accepts. Automaton has 3247 states and 8285 transitions. Word has length 30 [2021-06-12 21:33:14,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:14,177 INFO L482 AbstractCegarLoop]: Abstraction has 3247 states and 8285 transitions. [2021-06-12 21:33:14,178 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) [2021-06-12 21:33:14,178 INFO L276 IsEmpty]: Start isEmpty. Operand 3247 states and 8285 transitions. [2021-06-12 21:33:14,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:14,181 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:14,182 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:14,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:14,382 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:14,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:14,382 INFO L82 PathProgramCache]: Analyzing trace with hash -1763395665, now seen corresponding path program 62 times [2021-06-12 21:33:14,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:14,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289712169] [2021-06-12 21:33:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:14,649 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:14,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:14,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289712169] [2021-06-12 21:33:14,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289712169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:14,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062964269] [2021-06-12 21:33:14,650 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 [2021-06-12 21:33:14,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:14,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:14,681 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:14,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:15,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,013 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:15,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:15,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,019 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:15,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:15,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:15,021 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 [2021-06-12 21:33:15,022 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:15,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:15,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:15,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:15,051 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:15,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062964269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:15,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:15,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:33:15,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941396907] [2021-06-12 21:33:15,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:33:15,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:15,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:33:15,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:15,052 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) [2021-06-12 21:33:16,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:16,452 INFO L93 Difference]: Finished difference Result 4594 states and 11363 transitions. [2021-06-12 21:33:16,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:33:16,452 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 [2021-06-12 21:33:16,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:16,457 INFO L225 Difference]: With dead ends: 4594 [2021-06-12 21:33:16,457 INFO L226 Difference]: Without dead ends: 4561 [2021-06-12 21:33:16,457 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1512.2ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:33:16,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4561 states. [2021-06-12 21:33:16,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4561 to 3260. [2021-06-12 21:33:16,490 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) [2021-06-12 21:33:16,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3260 states to 3260 states and 8303 transitions. [2021-06-12 21:33:16,494 INFO L78 Accepts]: Start accepts. Automaton has 3260 states and 8303 transitions. Word has length 30 [2021-06-12 21:33:16,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:16,494 INFO L482 AbstractCegarLoop]: Abstraction has 3260 states and 8303 transitions. [2021-06-12 21:33:16,494 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) [2021-06-12 21:33:16,495 INFO L276 IsEmpty]: Start isEmpty. Operand 3260 states and 8303 transitions. [2021-06-12 21:33:16,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:16,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:16,498 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:16,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:16,698 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:16,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1372978863, now seen corresponding path program 63 times [2021-06-12 21:33:16,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:16,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227282150] [2021-06-12 21:33:16,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:33:16,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:16,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227282150] [2021-06-12 21:33:16,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227282150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:16,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326281741] [2021-06-12 21:33:16,995 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 [2021-06-12 21:33:17,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:33:17,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:17,029 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 21:33:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:17,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:17,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:17,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:17,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:17,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:17,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:17,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:17,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:17,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:17,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:17,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:17,458 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 [2021-06-12 21:33:17,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 21:33:17,673 INFO L628 ElimStorePlain]: treesize reduction 56, result has 40.4 percent of original size [2021-06-12 21:33:17,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:17,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:102, output treesize:74 [2021-06-12 21:33:17,826 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:17,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326281741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:17,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:17,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-12 21:33:17,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510121373] [2021-06-12 21:33:17,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:33:17,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:17,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:33:17,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:33:17,827 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) [2021-06-12 21:33:21,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:21,152 INFO L93 Difference]: Finished difference Result 4752 states and 11666 transitions. [2021-06-12 21:33:21,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-12 21:33:21,153 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 [2021-06-12 21:33:21,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:21,158 INFO L225 Difference]: With dead ends: 4752 [2021-06-12 21:33:21,158 INFO L226 Difference]: Without dead ends: 4721 [2021-06-12 21:33:21,158 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2292 ImplicationChecksByTransitivity, 3056.9ms TimeCoverageRelationStatistics Valid=917, Invalid=6565, Unknown=0, NotChecked=0, Total=7482 [2021-06-12 21:33:21,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4721 states. [2021-06-12 21:33:21,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4721 to 3277. [2021-06-12 21:33:21,208 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) [2021-06-12 21:33:21,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3277 states to 3277 states and 8343 transitions. [2021-06-12 21:33:21,213 INFO L78 Accepts]: Start accepts. Automaton has 3277 states and 8343 transitions. Word has length 30 [2021-06-12 21:33:21,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:21,214 INFO L482 AbstractCegarLoop]: Abstraction has 3277 states and 8343 transitions. [2021-06-12 21:33:21,214 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) [2021-06-12 21:33:21,214 INFO L276 IsEmpty]: Start isEmpty. Operand 3277 states and 8343 transitions. [2021-06-12 21:33:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:21,218 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:21,218 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:21,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 21:33:21,437 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:21,437 INFO L82 PathProgramCache]: Analyzing trace with hash 156127441, now seen corresponding path program 64 times [2021-06-12 21:33:21,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:21,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408469472] [2021-06-12 21:33:21,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:33:21,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:21,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408469472] [2021-06-12 21:33:21,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408469472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:21,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426520347] [2021-06-12 21:33:21,691 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 [2021-06-12 21:33:21,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:21,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:21,721 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:21,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:22,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:22,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:22,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:22,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:22,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:22,052 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:22,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:22,053 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:22,054 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:22,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:22,055 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:22,056 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:22,056 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 [2021-06-12 21:33:22,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:22,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:22,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:22,063 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:22,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426520347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:22,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:22,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:33:22,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414845001] [2021-06-12 21:33:22,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:22,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:22,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:22,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:22,082 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) [2021-06-12 21:33:23,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:23,608 INFO L93 Difference]: Finished difference Result 3751 states and 9329 transitions. [2021-06-12 21:33:23,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:33:23,608 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 [2021-06-12 21:33:23,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:23,612 INFO L225 Difference]: With dead ends: 3751 [2021-06-12 21:33:23,612 INFO L226 Difference]: Without dead ends: 3733 [2021-06-12 21:33:23,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1579.9ms TimeCoverageRelationStatistics Valid=426, Invalid=2654, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:33:23,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3733 states. [2021-06-12 21:33:23,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3733 to 3270. [2021-06-12 21:33:23,641 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) [2021-06-12 21:33:23,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3270 states to 3270 states and 8322 transitions. [2021-06-12 21:33:23,645 INFO L78 Accepts]: Start accepts. Automaton has 3270 states and 8322 transitions. Word has length 30 [2021-06-12 21:33:23,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:23,645 INFO L482 AbstractCegarLoop]: Abstraction has 3270 states and 8322 transitions. [2021-06-12 21:33:23,645 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) [2021-06-12 21:33:23,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3270 states and 8322 transitions. [2021-06-12 21:33:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:23,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:23,648 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:23,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-06-12 21:33:23,848 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:23,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:23,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1969334097, now seen corresponding path program 65 times [2021-06-12 21:33:23,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:23,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316538755] [2021-06-12 21:33:23,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:23,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:24,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316538755] [2021-06-12 21:33:24,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316538755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:24,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970142382] [2021-06-12 21:33:24,088 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 [2021-06-12 21:33:24,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:33:24,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:24,124 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:24,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:24,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:24,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:24,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:24,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:24,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:24,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:24,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:24,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:24,408 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:24,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:24,409 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:24,410 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:24,410 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 [2021-06-12 21:33:24,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:24,416 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:24,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:24,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:24,432 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:24,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970142382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:24,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:24,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:33:24,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004584081] [2021-06-12 21:33:24,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:33:24,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:24,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:33:24,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:24,432 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) [2021-06-12 21:33:25,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:25,193 INFO L93 Difference]: Finished difference Result 3590 states and 8850 transitions. [2021-06-12 21:33:25,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 21:33:25,194 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 [2021-06-12 21:33:25,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:25,197 INFO L225 Difference]: With dead ends: 3590 [2021-06-12 21:33:25,197 INFO L226 Difference]: Without dead ends: 3563 [2021-06-12 21:33:25,197 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 835.9ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 21:33:25,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3563 states. [2021-06-12 21:33:25,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3563 to 3273. [2021-06-12 21:33:25,246 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) [2021-06-12 21:33:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3273 states to 3273 states and 8312 transitions. [2021-06-12 21:33:25,252 INFO L78 Accepts]: Start accepts. Automaton has 3273 states and 8312 transitions. Word has length 30 [2021-06-12 21:33:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:25,252 INFO L482 AbstractCegarLoop]: Abstraction has 3273 states and 8312 transitions. [2021-06-12 21:33:25,252 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) [2021-06-12 21:33:25,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3273 states and 8312 transitions. [2021-06-12 21:33:25,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:25,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:25,256 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:25,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:25,473 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:25,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:25,473 INFO L82 PathProgramCache]: Analyzing trace with hash 255609963, now seen corresponding path program 66 times [2021-06-12 21:33:25,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:25,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907071096] [2021-06-12 21:33:25,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:25,704 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:25,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:25,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907071096] [2021-06-12 21:33:25,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907071096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:25,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919492566] [2021-06-12 21:33:25,704 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 [2021-06-12 21:33:25,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:33:25,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:25,729 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 21:33:25,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:26,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:26,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:26,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:26,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:26,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:26,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:26,076 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:26,101 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:26,101 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 [2021-06-12 21:33:26,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:33:26,185 INFO L628 ElimStorePlain]: treesize reduction 92, result has 29.2 percent of original size [2021-06-12 21:33:26,191 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:26,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-06-12 21:33:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:26,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919492566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:26,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:26,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-12 21:33:26,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764715026] [2021-06-12 21:33:26,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:33:26,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:26,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:33:26,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:33:26,283 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) [2021-06-12 21:33:28,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:28,889 INFO L93 Difference]: Finished difference Result 4934 states and 12188 transitions. [2021-06-12 21:33:28,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 21:33:28,889 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 [2021-06-12 21:33:28,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:28,894 INFO L225 Difference]: With dead ends: 4934 [2021-06-12 21:33:28,894 INFO L226 Difference]: Without dead ends: 4898 [2021-06-12 21:33:28,894 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 2523.6ms TimeCoverageRelationStatistics Valid=851, Invalid=3979, Unknown=0, NotChecked=0, Total=4830 [2021-06-12 21:33:28,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4898 states. [2021-06-12 21:33:28,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4898 to 3309. [2021-06-12 21:33:28,934 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) [2021-06-12 21:33:28,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3309 states to 3309 states and 8461 transitions. [2021-06-12 21:33:28,938 INFO L78 Accepts]: Start accepts. Automaton has 3309 states and 8461 transitions. Word has length 30 [2021-06-12 21:33:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:28,938 INFO L482 AbstractCegarLoop]: Abstraction has 3309 states and 8461 transitions. [2021-06-12 21:33:28,939 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) [2021-06-12 21:33:28,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3309 states and 8461 transitions. [2021-06-12 21:33:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:28,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:28,941 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:29,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:29,146 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:29,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:29,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1475159769, now seen corresponding path program 67 times [2021-06-12 21:33:29,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:29,146 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914400456] [2021-06-12 21:33:29,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:29,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:29,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914400456] [2021-06-12 21:33:29,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914400456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:29,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602996314] [2021-06-12 21:33:29,565 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 [2021-06-12 21:33:29,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:29,595 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:29,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:29,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:29,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:29,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:29,898 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:29,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:29,899 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 [2021-06-12 21:33:29,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:29,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:29,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:29,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:29,939 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:29,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602996314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:29,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:29,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:33:29,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688145509] [2021-06-12 21:33:29,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:33:29,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:29,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:33:29,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:29,940 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) [2021-06-12 21:33:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:31,880 INFO L93 Difference]: Finished difference Result 3897 states and 9765 transitions. [2021-06-12 21:33:31,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:33:31,881 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 [2021-06-12 21:33:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:31,885 INFO L225 Difference]: With dead ends: 3897 [2021-06-12 21:33:31,886 INFO L226 Difference]: Without dead ends: 3871 [2021-06-12 21:33:31,886 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1890.8ms TimeCoverageRelationStatistics Valid=444, Invalid=2418, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:33:31,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-12 21:33:31,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3131. [2021-06-12 21:33:31,933 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) [2021-06-12 21:33:31,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 7943 transitions. [2021-06-12 21:33:31,938 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 7943 transitions. Word has length 30 [2021-06-12 21:33:31,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:31,938 INFO L482 AbstractCegarLoop]: Abstraction has 3131 states and 7943 transitions. [2021-06-12 21:33:31,938 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) [2021-06-12 21:33:31,938 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 7943 transitions. [2021-06-12 21:33:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:31,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:31,941 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:32,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:32,160 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:32,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:32,160 INFO L82 PathProgramCache]: Analyzing trace with hash 921316715, now seen corresponding path program 68 times [2021-06-12 21:33:32,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:32,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997430295] [2021-06-12 21:33:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:32,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:32,577 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:32,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:32,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997430295] [2021-06-12 21:33:32,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997430295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:32,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26408995] [2021-06-12 21:33:32,578 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 [2021-06-12 21:33:32,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:32,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:32,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:32,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:33,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:33,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:33,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:33,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:33,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:33,086 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:33,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:33,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:33,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:33,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:33,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:33,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:33,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:33,091 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 [2021-06-12 21:33:33,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:33,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:33,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:33,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:33,130 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:33,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26408995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:33,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:33,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:33:33,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959103238] [2021-06-12 21:33:33,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:33:33,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:33,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:33:33,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:33,131 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) [2021-06-12 21:33:35,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:35,669 INFO L93 Difference]: Finished difference Result 3917 states and 9722 transitions. [2021-06-12 21:33:35,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:33:35,670 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 [2021-06-12 21:33:35,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:35,674 INFO L225 Difference]: With dead ends: 3917 [2021-06-12 21:33:35,674 INFO L226 Difference]: Without dead ends: 3891 [2021-06-12 21:33:35,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 2328.2ms TimeCoverageRelationStatistics Valid=494, Invalid=2698, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 21:33:35,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3891 states. [2021-06-12 21:33:35,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3891 to 3229. [2021-06-12 21:33:35,719 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) [2021-06-12 21:33:35,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3229 states to 3229 states and 8190 transitions. [2021-06-12 21:33:35,725 INFO L78 Accepts]: Start accepts. Automaton has 3229 states and 8190 transitions. Word has length 30 [2021-06-12 21:33:35,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:35,725 INFO L482 AbstractCegarLoop]: Abstraction has 3229 states and 8190 transitions. [2021-06-12 21:33:35,725 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) [2021-06-12 21:33:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3229 states and 8190 transitions. [2021-06-12 21:33:35,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:35,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:35,728 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:35,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:35,950 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:35,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2116019763, now seen corresponding path program 69 times [2021-06-12 21:33:35,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:35,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343426441] [2021-06-12 21:33:35,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:35,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:36,369 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:36,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:36,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343426441] [2021-06-12 21:33:36,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343426441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:36,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240205355] [2021-06-12 21:33:36,369 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 [2021-06-12 21:33:36,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:33:36,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:36,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 21:33:36,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:36,911 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:36,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:36,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:36,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:36,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:36,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:36,969 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:36,970 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 [2021-06-12 21:33:37,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:33:37,594 INFO L628 ElimStorePlain]: treesize reduction 387, result has 8.9 percent of original size [2021-06-12 21:33:37,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:37,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-06-12 21:33:37,698 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:37,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240205355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:37,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:37,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-12 21:33:37,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981839456] [2021-06-12 21:33:37,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:33:37,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:37,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:33:37,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=686, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:33:37,699 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) [2021-06-12 21:33:41,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:41,424 INFO L93 Difference]: Finished difference Result 4685 states and 11648 transitions. [2021-06-12 21:33:41,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 21:33:41,425 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 [2021-06-12 21:33:41,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:41,430 INFO L225 Difference]: With dead ends: 4685 [2021-06-12 21:33:41,430 INFO L226 Difference]: Without dead ends: 4633 [2021-06-12 21:33:41,430 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 3307.2ms TimeCoverageRelationStatistics Valid=886, Invalid=4664, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 21:33:41,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4633 states. [2021-06-12 21:33:41,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4633 to 3370. [2021-06-12 21:33:41,472 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) [2021-06-12 21:33:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3370 states to 3370 states and 8604 transitions. [2021-06-12 21:33:41,477 INFO L78 Accepts]: Start accepts. Automaton has 3370 states and 8604 transitions. Word has length 30 [2021-06-12 21:33:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:41,477 INFO L482 AbstractCegarLoop]: Abstraction has 3370 states and 8604 transitions. [2021-06-12 21:33:41,477 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) [2021-06-12 21:33:41,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3370 states and 8604 transitions. [2021-06-12 21:33:41,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:41,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:41,480 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:41,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-12 21:33:41,681 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:41,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1215646195, now seen corresponding path program 70 times [2021-06-12 21:33:41,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:41,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537662837] [2021-06-12 21:33:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:41,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:41,985 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:41,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:41,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537662837] [2021-06-12 21:33:41,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537662837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:41,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891477309] [2021-06-12 21:33:41,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:33:42,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:42,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:42,020 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:42,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:42,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:42,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,309 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:42,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:42,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:42,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:42,312 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 [2021-06-12 21:33:42,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:42,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:42,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:42,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:42,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891477309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:42,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:42,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:33:42,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089140624] [2021-06-12 21:33:42,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:33:42,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:42,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:33:42,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:33:42,343 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) [2021-06-12 21:33:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:43,532 INFO L93 Difference]: Finished difference Result 3767 states and 9411 transitions. [2021-06-12 21:33:43,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-12 21:33:43,533 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 [2021-06-12 21:33:43,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:43,536 INFO L225 Difference]: With dead ends: 3767 [2021-06-12 21:33:43,536 INFO L226 Difference]: Without dead ends: 3736 [2021-06-12 21:33:43,537 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 717 ImplicationChecksByTransitivity, 1291.5ms TimeCoverageRelationStatistics Valid=395, Invalid=2155, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 21:33:43,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3736 states. [2021-06-12 21:33:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3736 to 3431. [2021-06-12 21:33:43,570 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) [2021-06-12 21:33:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3431 states to 3431 states and 8703 transitions. [2021-06-12 21:33:43,575 INFO L78 Accepts]: Start accepts. Automaton has 3431 states and 8703 transitions. Word has length 30 [2021-06-12 21:33:43,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:43,575 INFO L482 AbstractCegarLoop]: Abstraction has 3431 states and 8703 transitions. [2021-06-12 21:33:43,575 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) [2021-06-12 21:33:43,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3431 states and 8703 transitions. [2021-06-12 21:33:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:43,578 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:43,578 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:43,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-12 21:33:43,778 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:43,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:43,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1042549111, now seen corresponding path program 71 times [2021-06-12 21:33:43,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:43,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096688246] [2021-06-12 21:33:43,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:44,108 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:44,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:44,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096688246] [2021-06-12 21:33:44,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096688246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:44,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1226927344] [2021-06-12 21:33:44,109 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 [2021-06-12 21:33:44,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:33:44,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:44,143 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:44,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:44,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:44,393 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:44,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:44,394 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:44,395 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:44,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:44,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:44,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:44,399 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:44,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:44,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:44,400 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:44,401 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:44,401 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 [2021-06-12 21:33:44,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:44,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:44,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:44,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:44,424 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:44,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1226927344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:44,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:44,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-12 21:33:44,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085388623] [2021-06-12 21:33:44,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:33:44,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:44,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:33:44,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:33:44,425 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) [2021-06-12 21:33:45,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:45,818 INFO L93 Difference]: Finished difference Result 4784 states and 11766 transitions. [2021-06-12 21:33:45,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:33:45,818 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 [2021-06-12 21:33:45,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:45,823 INFO L225 Difference]: With dead ends: 4784 [2021-06-12 21:33:45,823 INFO L226 Difference]: Without dead ends: 4733 [2021-06-12 21:33:45,823 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1352.0ms TimeCoverageRelationStatistics Valid=407, Invalid=2349, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:33:45,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4733 states. [2021-06-12 21:33:45,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4733 to 3433. [2021-06-12 21:33:45,858 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) [2021-06-12 21:33:45,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 8706 transitions. [2021-06-12 21:33:45,863 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 8706 transitions. Word has length 30 [2021-06-12 21:33:45,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:45,863 INFO L482 AbstractCegarLoop]: Abstraction has 3433 states and 8706 transitions. [2021-06-12 21:33:45,863 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) [2021-06-12 21:33:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 8706 transitions. [2021-06-12 21:33:45,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:45,866 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:45,866 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:46,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:46,068 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:46,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:46,068 INFO L82 PathProgramCache]: Analyzing trace with hash 190286455, now seen corresponding path program 72 times [2021-06-12 21:33:46,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:46,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122928559] [2021-06-12 21:33:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:46,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:46,361 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:46,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:46,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122928559] [2021-06-12 21:33:46,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122928559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:46,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832518737] [2021-06-12 21:33:46,361 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 [2021-06-12 21:33:46,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:33:46,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:46,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 21:33:46,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:46,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:46,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:46,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:46,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:46,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:46,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:46,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:46,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:46,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:46,759 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 [2021-06-12 21:33:46,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:33:46,833 INFO L628 ElimStorePlain]: treesize reduction 96, result has 28.4 percent of original size [2021-06-12 21:33:46,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:46,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-06-12 21:33:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:46,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832518737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:46,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:46,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-12 21:33:46,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998540457] [2021-06-12 21:33:46,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:33:46,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:46,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:33:46,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:33:46,942 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) [2021-06-12 21:33:49,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:49,538 INFO L93 Difference]: Finished difference Result 4909 states and 12103 transitions. [2021-06-12 21:33:49,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-12 21:33:49,538 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 [2021-06-12 21:33:49,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:49,543 INFO L225 Difference]: With dead ends: 4909 [2021-06-12 21:33:49,543 INFO L226 Difference]: Without dead ends: 4866 [2021-06-12 21:33:49,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1753 ImplicationChecksByTransitivity, 2715.3ms TimeCoverageRelationStatistics Valid=894, Invalid=4508, Unknown=0, NotChecked=0, Total=5402 [2021-06-12 21:33:49,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-12 21:33:49,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 3622. [2021-06-12 21:33:49,585 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) [2021-06-12 21:33:49,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3622 states to 3622 states and 9154 transitions. [2021-06-12 21:33:49,591 INFO L78 Accepts]: Start accepts. Automaton has 3622 states and 9154 transitions. Word has length 30 [2021-06-12 21:33:49,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:49,591 INFO L482 AbstractCegarLoop]: Abstraction has 3622 states and 9154 transitions. [2021-06-12 21:33:49,591 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) [2021-06-12 21:33:49,591 INFO L276 IsEmpty]: Start isEmpty. Operand 3622 states and 9154 transitions. [2021-06-12 21:33:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:49,594 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:49,594 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:49,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:49,795 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:49,795 INFO L82 PathProgramCache]: Analyzing trace with hash 760018863, now seen corresponding path program 73 times [2021-06-12 21:33:49,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:49,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704108137] [2021-06-12 21:33:49,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:50,010 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:50,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:50,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704108137] [2021-06-12 21:33:50,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704108137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:50,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786222755] [2021-06-12 21:33:50,011 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 [2021-06-12 21:33:50,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:50,035 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:50,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:50,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:50,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:50,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:50,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:50,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:50,270 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:50,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:50,271 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:50,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:50,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:50,272 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:50,273 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 [2021-06-12 21:33:50,274 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:50,278 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:50,279 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:50,279 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:50,296 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:50,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786222755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:50,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:50,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:33:50,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992183088] [2021-06-12 21:33:50,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:50,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:50,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:50,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:50,297 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) [2021-06-12 21:33:51,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:51,598 INFO L93 Difference]: Finished difference Result 3927 states and 9781 transitions. [2021-06-12 21:33:51,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:33:51,598 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 [2021-06-12 21:33:51,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:51,601 INFO L225 Difference]: With dead ends: 3927 [2021-06-12 21:33:51,601 INFO L226 Difference]: Without dead ends: 3899 [2021-06-12 21:33:51,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1284.1ms TimeCoverageRelationStatistics Valid=358, Invalid=2294, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:33:51,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3899 states. [2021-06-12 21:33:51,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3899 to 3664. [2021-06-12 21:33:51,632 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) [2021-06-12 21:33:51,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3664 states to 3664 states and 9254 transitions. [2021-06-12 21:33:51,636 INFO L78 Accepts]: Start accepts. Automaton has 3664 states and 9254 transitions. Word has length 30 [2021-06-12 21:33:51,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:51,637 INFO L482 AbstractCegarLoop]: Abstraction has 3664 states and 9254 transitions. [2021-06-12 21:33:51,637 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) [2021-06-12 21:33:51,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3664 states and 9254 transitions. [2021-06-12 21:33:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:51,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:51,640 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:51,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:51,840 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:51,840 INFO L82 PathProgramCache]: Analyzing trace with hash -224198605, now seen corresponding path program 74 times [2021-06-12 21:33:51,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:51,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481043079] [2021-06-12 21:33:51,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:52,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:52,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481043079] [2021-06-12 21:33:52,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481043079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:52,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421900985] [2021-06-12 21:33:52,046 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 [2021-06-12 21:33:52,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:33:52,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:52,069 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:52,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:52,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:52,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:52,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:52,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:52,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:52,302 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:52,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:52,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:52,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:52,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:52,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:52,305 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:52,306 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 [2021-06-12 21:33:52,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:52,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:52,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:52,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:52,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421900985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:52,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:52,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:33:52,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858972219] [2021-06-12 21:33:52,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:52,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:52,329 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) [2021-06-12 21:33:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:53,237 INFO L93 Difference]: Finished difference Result 4402 states and 10861 transitions. [2021-06-12 21:33:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 21:33:53,238 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 [2021-06-12 21:33:53,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:53,242 INFO L225 Difference]: With dead ends: 4402 [2021-06-12 21:33:53,242 INFO L226 Difference]: Without dead ends: 4365 [2021-06-12 21:33:53,242 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 847.4ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 21:33:53,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4365 states. [2021-06-12 21:33:53,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4365 to 3871. [2021-06-12 21:33:53,281 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) [2021-06-12 21:33:53,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3871 states to 3871 states and 9800 transitions. [2021-06-12 21:33:53,286 INFO L78 Accepts]: Start accepts. Automaton has 3871 states and 9800 transitions. Word has length 30 [2021-06-12 21:33:53,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:53,286 INFO L482 AbstractCegarLoop]: Abstraction has 3871 states and 9800 transitions. [2021-06-12 21:33:53,286 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) [2021-06-12 21:33:53,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3871 states and 9800 transitions. [2021-06-12 21:33:53,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:53,289 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:53,289 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:53,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:33:53,490 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:53,490 INFO L82 PathProgramCache]: Analyzing trace with hash 2000745455, now seen corresponding path program 75 times [2021-06-12 21:33:53,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:53,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427406463] [2021-06-12 21:33:53,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:53,732 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:53,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:53,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427406463] [2021-06-12 21:33:53,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427406463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:53,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106740465] [2021-06-12 21:33:53,732 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 [2021-06-12 21:33:53,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:33:53,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:53,759 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 21:33:53,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:54,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:54,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:54,148 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:54,148 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 [2021-06-12 21:33:54,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:33:54,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:54,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:54,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:103, output treesize:46 [2021-06-12 21:33:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:54,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106740465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:54,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:54,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-12 21:33:54,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201429482] [2021-06-12 21:33:54,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:33:54,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:54,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:33:54,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:33:54,412 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) [2021-06-12 21:33:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:56,871 INFO L93 Difference]: Finished difference Result 4724 states and 11672 transitions. [2021-06-12 21:33:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 21:33:56,871 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 [2021-06-12 21:33:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:56,876 INFO L225 Difference]: With dead ends: 4724 [2021-06-12 21:33:56,876 INFO L226 Difference]: Without dead ends: 4685 [2021-06-12 21:33:56,876 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 2317.0ms TimeCoverageRelationStatistics Valid=538, Invalid=4154, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 21:33:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4685 states. [2021-06-12 21:33:56,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4685 to 4113. [2021-06-12 21:33:56,914 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) [2021-06-12 21:33:56,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4113 states to 4113 states and 10382 transitions. [2021-06-12 21:33:56,919 INFO L78 Accepts]: Start accepts. Automaton has 4113 states and 10382 transitions. Word has length 30 [2021-06-12 21:33:56,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:56,919 INFO L482 AbstractCegarLoop]: Abstraction has 4113 states and 10382 transitions. [2021-06-12 21:33:56,919 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) [2021-06-12 21:33:56,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4113 states and 10382 transitions. [2021-06-12 21:33:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:56,924 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:56,924 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:57,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-12 21:33:57,137 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash 269975723, now seen corresponding path program 76 times [2021-06-12 21:33:57,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:57,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52055873] [2021-06-12 21:33:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:33:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:33:57,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:33:57,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52055873] [2021-06-12 21:33:57,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52055873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:57,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510659421] [2021-06-12 21:33:57,368 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 [2021-06-12 21:33:57,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:33:57,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:33:57,393 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:33:57,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:33:57,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:57,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:57,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:57,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:57,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:57,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:57,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:57,617 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:57,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:57,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:57,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:57,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:33:57,620 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:33:57,620 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 [2021-06-12 21:33:57,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:33:57,626 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:33:57,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:33:57,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:33:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:33:57,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510659421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:33:57,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:33:57,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:33:57,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119137670] [2021-06-12 21:33:57,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:33:57,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:33:57,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:33:57,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:33:57,646 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) [2021-06-12 21:33:59,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:33:59,568 INFO L93 Difference]: Finished difference Result 4964 states and 12268 transitions. [2021-06-12 21:33:59,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 21:33:59,568 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 [2021-06-12 21:33:59,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:33:59,587 INFO L225 Difference]: With dead ends: 4964 [2021-06-12 21:33:59,587 INFO L226 Difference]: Without dead ends: 4899 [2021-06-12 21:33:59,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1712.2ms TimeCoverageRelationStatistics Valid=486, Invalid=3054, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:33:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4899 states. [2021-06-12 21:33:59,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4899 to 4207. [2021-06-12 21:33:59,622 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) [2021-06-12 21:33:59,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 10600 transitions. [2021-06-12 21:33:59,627 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 10600 transitions. Word has length 30 [2021-06-12 21:33:59,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:33:59,628 INFO L482 AbstractCegarLoop]: Abstraction has 4207 states and 10600 transitions. [2021-06-12 21:33:59,628 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) [2021-06-12 21:33:59,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 10600 transitions. [2021-06-12 21:33:59,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:33:59,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:33:59,631 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:33:59,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-12 21:33:59,832 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:33:59,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:33:59,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1628515089, now seen corresponding path program 77 times [2021-06-12 21:33:59,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:33:59,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823588516] [2021-06-12 21:33:59,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:33:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:00,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:00,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823588516] [2021-06-12 21:34:00,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823588516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:00,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968177405] [2021-06-12 21:34:00,050 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 [2021-06-12 21:34:00,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 21:34:00,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:00,076 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:00,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:00,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,310 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:00,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:00,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:00,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:00,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:00,315 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 [2021-06-12 21:34:00,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:00,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:00,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:00,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:00,351 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:00,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968177405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:00,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:00,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:34:00,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761368903] [2021-06-12 21:34:00,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:00,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:00,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:00,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:34:00,352 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) [2021-06-12 21:34:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:02,074 INFO L93 Difference]: Finished difference Result 4760 states and 11847 transitions. [2021-06-12 21:34:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:34:02,074 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 [2021-06-12 21:34:02,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:02,079 INFO L225 Difference]: With dead ends: 4760 [2021-06-12 21:34:02,079 INFO L226 Difference]: Without dead ends: 4720 [2021-06-12 21:34:02,079 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1486.6ms TimeCoverageRelationStatistics Valid=360, Invalid=2396, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 21:34:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4720 states. [2021-06-12 21:34:02,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4720 to 4245. [2021-06-12 21:34:02,116 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) [2021-06-12 21:34:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4245 states to 4245 states and 10676 transitions. [2021-06-12 21:34:02,121 INFO L78 Accepts]: Start accepts. Automaton has 4245 states and 10676 transitions. Word has length 30 [2021-06-12 21:34:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:02,121 INFO L482 AbstractCegarLoop]: Abstraction has 4245 states and 10676 transitions. [2021-06-12 21:34:02,121 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) [2021-06-12 21:34:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 4245 states and 10676 transitions. [2021-06-12 21:34:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:02,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:02,126 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:02,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-12 21:34:02,348 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:02,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1834453521, now seen corresponding path program 78 times [2021-06-12 21:34:02,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:02,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612590203] [2021-06-12 21:34:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:02,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:02,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612590203] [2021-06-12 21:34:02,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612590203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:02,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461232484] [2021-06-12 21:34:02,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:34:02,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 21:34:02,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:02,715 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:02,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:02,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,945 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:02,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:02,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:02,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:02,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:02,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 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 [2021-06-12 21:34:02,951 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:02,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:02,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:02,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:02,976 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:02,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461232484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:02,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:02,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:34:02,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420989166] [2021-06-12 21:34:02,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:34:02,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:02,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:34:02,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:34:02,977 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) [2021-06-12 21:34:04,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:04,966 INFO L93 Difference]: Finished difference Result 4832 states and 11925 transitions. [2021-06-12 21:34:04,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:34:04,966 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 [2021-06-12 21:34:04,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:04,970 INFO L225 Difference]: With dead ends: 4832 [2021-06-12 21:34:04,970 INFO L226 Difference]: Without dead ends: 4777 [2021-06-12 21:34:04,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 1853.9ms TimeCoverageRelationStatistics Valid=470, Invalid=3070, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:34:04,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-06-12 21:34:05,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 4315. [2021-06-12 21:34:05,017 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) [2021-06-12 21:34:05,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4315 states to 4315 states and 10840 transitions. [2021-06-12 21:34:05,022 INFO L78 Accepts]: Start accepts. Automaton has 4315 states and 10840 transitions. Word has length 30 [2021-06-12 21:34:05,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:05,023 INFO L482 AbstractCegarLoop]: Abstraction has 4315 states and 10840 transitions. [2021-06-12 21:34:05,023 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) [2021-06-12 21:34:05,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4315 states and 10840 transitions. [2021-06-12 21:34:05,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:05,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:05,026 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:05,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable377,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:05,226 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:05,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:05,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1966954945, now seen corresponding path program 79 times [2021-06-12 21:34:05,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:05,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120296026] [2021-06-12 21:34:05,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:05,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:05,523 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:05,524 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:05,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120296026] [2021-06-12 21:34:05,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120296026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:05,524 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005980155] [2021-06-12 21:34:05,524 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 [2021-06-12 21:34:05,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:05,548 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:05,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:05,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:05,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:05,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:05,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:05,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:05,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:05,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:05,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:05,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:05,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:05,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:05,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:05,814 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 [2021-06-12 21:34:05,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:05,819 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:05,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:05,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:05,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005980155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:05,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:05,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-12 21:34:05,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39938616] [2021-06-12 21:34:05,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:05,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:05,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:05,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:05,840 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) [2021-06-12 21:34:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:07,458 INFO L93 Difference]: Finished difference Result 5809 states and 14168 transitions. [2021-06-12 21:34:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:34:07,458 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 [2021-06-12 21:34:07,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:07,464 INFO L225 Difference]: With dead ends: 5809 [2021-06-12 21:34:07,464 INFO L226 Difference]: Without dead ends: 5760 [2021-06-12 21:34:07,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 1488.9ms TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:34:07,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-06-12 21:34:07,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 4424. [2021-06-12 21:34:07,512 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) [2021-06-12 21:34:07,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4424 states to 4424 states and 11115 transitions. [2021-06-12 21:34:07,518 INFO L78 Accepts]: Start accepts. Automaton has 4424 states and 11115 transitions. Word has length 30 [2021-06-12 21:34:07,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:07,518 INFO L482 AbstractCegarLoop]: Abstraction has 4424 states and 11115 transitions. [2021-06-12 21:34:07,518 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) [2021-06-12 21:34:07,519 INFO L276 IsEmpty]: Start isEmpty. Operand 4424 states and 11115 transitions. [2021-06-12 21:34:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:07,522 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:07,522 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:07,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-12 21:34:07,723 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:07,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:07,723 INFO L82 PathProgramCache]: Analyzing trace with hash -477602821, now seen corresponding path program 80 times [2021-06-12 21:34:07,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:07,723 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015914489] [2021-06-12 21:34:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:07,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:08,003 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:08,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:08,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015914489] [2021-06-12 21:34:08,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015914489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:08,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576475604] [2021-06-12 21:34:08,004 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 [2021-06-12 21:34:08,027 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:34:08,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:08,028 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:08,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:08,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:08,273 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:08,275 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:08,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:08,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:08,277 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:08,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:08,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:08,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:08,279 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:08,279 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 [2021-06-12 21:34:08,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:08,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:08,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:08,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:08,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576475604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:08,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:08,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-12 21:34:08,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462558047] [2021-06-12 21:34:08,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:08,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:08,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:08,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:08,307 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) [2021-06-12 21:34:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:09,737 INFO L93 Difference]: Finished difference Result 5600 states and 13788 transitions. [2021-06-12 21:34:09,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:34:09,737 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 [2021-06-12 21:34:09,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:09,744 INFO L225 Difference]: With dead ends: 5600 [2021-06-12 21:34:09,744 INFO L226 Difference]: Without dead ends: 5549 [2021-06-12 21:34:09,744 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1326.3ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:34:09,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5549 states. [2021-06-12 21:34:09,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5549 to 4477. [2021-06-12 21:34:09,795 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) [2021-06-12 21:34:09,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4477 states to 4477 states and 11223 transitions. [2021-06-12 21:34:09,801 INFO L78 Accepts]: Start accepts. Automaton has 4477 states and 11223 transitions. Word has length 30 [2021-06-12 21:34:09,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:09,802 INFO L482 AbstractCegarLoop]: Abstraction has 4477 states and 11223 transitions. [2021-06-12 21:34:09,802 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) [2021-06-12 21:34:09,802 INFO L276 IsEmpty]: Start isEmpty. Operand 4477 states and 11223 transitions. [2021-06-12 21:34:09,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:09,806 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:09,806 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:10,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:10,007 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:10,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:10,007 INFO L82 PathProgramCache]: Analyzing trace with hash -1462264581, now seen corresponding path program 81 times [2021-06-12 21:34:10,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:10,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976339686] [2021-06-12 21:34:10,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:10,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:10,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976339686] [2021-06-12 21:34:10,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976339686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:10,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576109797] [2021-06-12 21:34:10,267 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 [2021-06-12 21:34:10,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:34:10,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:10,312 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-12 21:34:10,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:10,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:10,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:10,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:10,692 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:10,701 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:10,746 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:10,746 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 [2021-06-12 21:34:11,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-06-12 21:34:11,426 INFO L628 ElimStorePlain]: treesize reduction 578, result has 6.2 percent of original size [2021-06-12 21:34:11,431 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:11,431 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-06-12 21:34:11,532 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:11,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576109797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:11,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:11,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-06-12 21:34:11,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800647440] [2021-06-12 21:34:11,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:34:11,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:11,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:34:11,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:34:11,533 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) [2021-06-12 21:34:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:14,027 INFO L93 Difference]: Finished difference Result 5628 states and 13862 transitions. [2021-06-12 21:34:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:34:14,028 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 [2021-06-12 21:34:14,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:14,033 INFO L225 Difference]: With dead ends: 5628 [2021-06-12 21:34:14,033 INFO L226 Difference]: Without dead ends: 5604 [2021-06-12 21:34:14,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 2364.0ms TimeCoverageRelationStatistics Valid=675, Invalid=3357, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:34:14,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5604 states. [2021-06-12 21:34:14,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5604 to 4485. [2021-06-12 21:34:14,096 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) [2021-06-12 21:34:14,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4485 states to 4485 states and 11239 transitions. [2021-06-12 21:34:14,102 INFO L78 Accepts]: Start accepts. Automaton has 4485 states and 11239 transitions. Word has length 30 [2021-06-12 21:34:14,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:14,103 INFO L482 AbstractCegarLoop]: Abstraction has 4485 states and 11239 transitions. [2021-06-12 21:34:14,103 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) [2021-06-12 21:34:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 4485 states and 11239 transitions. [2021-06-12 21:34:14,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:14,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:14,107 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:14,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-12 21:34:14,308 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:14,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:14,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1668203013, now seen corresponding path program 82 times [2021-06-12 21:34:14,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:14,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434112414] [2021-06-12 21:34:14,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:14,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:14,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434112414] [2021-06-12 21:34:14,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434112414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:14,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644949766] [2021-06-12 21:34:14,541 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 [2021-06-12 21:34:14,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:34:14,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:14,566 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:14,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:14,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:14,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:14,785 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:14,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:14,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:14,787 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:14,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:14,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:14,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:14,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:14,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:14,790 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 [2021-06-12 21:34:14,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:14,795 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:14,796 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:14,796 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:14,814 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:14,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644949766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:14,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:14,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:34:14,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296669587] [2021-06-12 21:34:14,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:34:14,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:14,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:34:14,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:34:14,815 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) [2021-06-12 21:34:16,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:16,566 INFO L93 Difference]: Finished difference Result 5013 states and 12435 transitions. [2021-06-12 21:34:16,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:34:16,567 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 [2021-06-12 21:34:16,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:16,571 INFO L225 Difference]: With dead ends: 5013 [2021-06-12 21:34:16,571 INFO L226 Difference]: Without dead ends: 4984 [2021-06-12 21:34:16,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1640.7ms TimeCoverageRelationStatistics Valid=623, Invalid=3037, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:34:16,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4984 states. [2021-06-12 21:34:16,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4984 to 4423. [2021-06-12 21:34:16,610 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) [2021-06-12 21:34:16,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4423 states to 4423 states and 11043 transitions. [2021-06-12 21:34:16,615 INFO L78 Accepts]: Start accepts. Automaton has 4423 states and 11043 transitions. Word has length 30 [2021-06-12 21:34:16,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:16,615 INFO L482 AbstractCegarLoop]: Abstraction has 4423 states and 11043 transitions. [2021-06-12 21:34:16,615 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) [2021-06-12 21:34:16,615 INFO L276 IsEmpty]: Start isEmpty. Operand 4423 states and 11043 transitions. [2021-06-12 21:34:16,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:16,618 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:16,618 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:16,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:16,819 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash 475012403, now seen corresponding path program 83 times [2021-06-12 21:34:16,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:16,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337941210] [2021-06-12 21:34:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:17,025 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:17,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:17,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337941210] [2021-06-12 21:34:17,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337941210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:17,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364144392] [2021-06-12 21:34:17,025 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 [2021-06-12 21:34:17,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:34:17,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:17,065 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:17,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:17,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:17,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,333 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:17,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,334 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:17,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:17,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:17,336 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 [2021-06-12 21:34:17,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:17,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:17,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:17,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:17,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364144392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:17,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:17,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:34:17,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400769193] [2021-06-12 21:34:17,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:17,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:17,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:17,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:34:17,360 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) [2021-06-12 21:34:18,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:18,765 INFO L93 Difference]: Finished difference Result 4995 states and 12313 transitions. [2021-06-12 21:34:18,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:34:18,768 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 [2021-06-12 21:34:18,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:18,774 INFO L225 Difference]: With dead ends: 4995 [2021-06-12 21:34:18,775 INFO L226 Difference]: Without dead ends: 4959 [2021-06-12 21:34:18,775 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1180.2ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-06-12 21:34:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-06-12 21:34:18,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 4643. [2021-06-12 21:34:18,835 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) [2021-06-12 21:34:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 11619 transitions. [2021-06-12 21:34:18,844 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 11619 transitions. Word has length 30 [2021-06-12 21:34:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:18,844 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 11619 transitions. [2021-06-12 21:34:18,844 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) [2021-06-12 21:34:18,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 11619 transitions. [2021-06-12 21:34:18,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:18,850 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:18,850 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:19,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable495 [2021-06-12 21:34:19,068 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:19,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:19,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1805369083, now seen corresponding path program 84 times [2021-06-12 21:34:19,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:19,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177323778] [2021-06-12 21:34:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:19,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:19,352 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:19,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:19,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177323778] [2021-06-12 21:34:19,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177323778] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:19,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038002165] [2021-06-12 21:34:19,352 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 [2021-06-12 21:34:19,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:34:19,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:19,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-06-12 21:34:19,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:19,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,888 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,893 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:19,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:19,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:19,925 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 [2021-06-12 21:34:19,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:34:19,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:19,964 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:19,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:21 [2021-06-12 21:34:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:20,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038002165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:20,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:20,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-06-12 21:34:20,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349003729] [2021-06-12 21:34:20,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 21:34:20,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:20,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 21:34:20,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-06-12 21:34:20,037 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) [2021-06-12 21:34:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:22,098 INFO L93 Difference]: Finished difference Result 5869 states and 14309 transitions. [2021-06-12 21:34:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:34:22,098 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 [2021-06-12 21:34:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:22,104 INFO L225 Difference]: With dead ends: 5869 [2021-06-12 21:34:22,105 INFO L226 Difference]: Without dead ends: 5852 [2021-06-12 21:34:22,105 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 1801.9ms TimeCoverageRelationStatistics Valid=477, Invalid=3063, Unknown=0, NotChecked=0, Total=3540 [2021-06-12 21:34:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-06-12 21:34:22,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4657. [2021-06-12 21:34:22,159 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) [2021-06-12 21:34:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 11665 transitions. [2021-06-12 21:34:22,165 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 11665 transitions. Word has length 30 [2021-06-12 21:34:22,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:22,165 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 11665 transitions. [2021-06-12 21:34:22,165 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) [2021-06-12 21:34:22,165 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 11665 transitions. [2021-06-12 21:34:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:22,169 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:22,169 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:22,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable496 [2021-06-12 21:34:22,370 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:22,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:22,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1082897335, now seen corresponding path program 85 times [2021-06-12 21:34:22,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:22,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583213337] [2021-06-12 21:34:22,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:22,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:22,633 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:22,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:22,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583213337] [2021-06-12 21:34:22,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583213337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:22,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643577393] [2021-06-12 21:34:22,633 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 [2021-06-12 21:34:22,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:22,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:22,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:22,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:22,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:22,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:22,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:22,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:22,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:22,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:22,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:22,883 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:22,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:22,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:22,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:22,885 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 [2021-06-12 21:34:22,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:22,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:22,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:22,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:22,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643577393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:22,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:22,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-06-12 21:34:22,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612450864] [2021-06-12 21:34:22,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:22,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:22,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:22,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:22,908 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) [2021-06-12 21:34:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:24,153 INFO L93 Difference]: Finished difference Result 5656 states and 13885 transitions. [2021-06-12 21:34:24,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 21:34:24,153 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 [2021-06-12 21:34:24,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:24,159 INFO L225 Difference]: With dead ends: 5656 [2021-06-12 21:34:24,159 INFO L226 Difference]: Without dead ends: 5619 [2021-06-12 21:34:24,159 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1191.0ms TimeCoverageRelationStatistics Valid=416, Invalid=2236, Unknown=0, NotChecked=0, Total=2652 [2021-06-12 21:34:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5619 states. [2021-06-12 21:34:24,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5619 to 4600. [2021-06-12 21:34:24,208 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) [2021-06-12 21:34:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 11524 transitions. [2021-06-12 21:34:24,213 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 11524 transitions. Word has length 30 [2021-06-12 21:34:24,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:24,213 INFO L482 AbstractCegarLoop]: Abstraction has 4600 states and 11524 transitions. [2021-06-12 21:34:24,214 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) [2021-06-12 21:34:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 11524 transitions. [2021-06-12 21:34:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:24,217 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:24,217 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:24,417 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable509,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:24,418 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:24,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:24,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1193064333, now seen corresponding path program 86 times [2021-06-12 21:34:24,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:24,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248228432] [2021-06-12 21:34:24,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:24,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:24,625 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:24,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:24,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248228432] [2021-06-12 21:34:24,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248228432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:24,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818788948] [2021-06-12 21:34:24,625 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 [2021-06-12 21:34:24,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:34:24,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:24,650 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:24,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:24,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:24,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:24,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:24,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:24,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:24,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:24,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:24,905 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:24,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:24,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:24,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:24,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:24,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:24,908 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 [2021-06-12 21:34:24,909 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:24,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:24,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:24,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:24,933 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:24,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818788948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:24,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:24,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:34:24,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764146416] [2021-06-12 21:34:24,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:24,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:24,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:24,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:34:24,934 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) [2021-06-12 21:34:26,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:26,319 INFO L93 Difference]: Finished difference Result 5225 states and 12941 transitions. [2021-06-12 21:34:26,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 21:34:26,319 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 [2021-06-12 21:34:26,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:26,324 INFO L225 Difference]: With dead ends: 5225 [2021-06-12 21:34:26,324 INFO L226 Difference]: Without dead ends: 5199 [2021-06-12 21:34:26,325 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 1343.0ms TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2021-06-12 21:34:26,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5199 states. [2021-06-12 21:34:26,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5199 to 4667. [2021-06-12 21:34:26,377 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) [2021-06-12 21:34:26,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 11690 transitions. [2021-06-12 21:34:26,383 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 11690 transitions. Word has length 30 [2021-06-12 21:34:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:26,383 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 11690 transitions. [2021-06-12 21:34:26,383 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) [2021-06-12 21:34:26,383 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 11690 transitions. [2021-06-12 21:34:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:26,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:26,387 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:26,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable510 [2021-06-12 21:34:26,588 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:26,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:26,588 INFO L82 PathProgramCache]: Analyzing trace with hash -84573205, now seen corresponding path program 87 times [2021-06-12 21:34:26,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:26,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312110578] [2021-06-12 21:34:26,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:26,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:26,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312110578] [2021-06-12 21:34:26,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312110578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:26,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998277702] [2021-06-12 21:34:26,803 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 [2021-06-12 21:34:26,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:34:26,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:26,828 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 42 conjunts are in the unsatisfiable core [2021-06-12 21:34:26,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:27,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:27,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:27,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:27,200 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:27,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:27,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:27,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:27,249 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 [2021-06-12 21:34:27,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-06-12 21:34:27,378 INFO L628 ElimStorePlain]: treesize reduction 68, result has 32.7 percent of original size [2021-06-12 21:34:27,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:27,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:89, output treesize:27 [2021-06-12 21:34:27,468 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:27,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998277702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:27,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:27,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-12 21:34:27,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130816144] [2021-06-12 21:34:27,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:34:27,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:27,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:34:27,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:34:27,469 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) [2021-06-12 21:34:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:29,450 INFO L93 Difference]: Finished difference Result 5151 states and 12701 transitions. [2021-06-12 21:34:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:34:29,451 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 [2021-06-12 21:34:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:29,455 INFO L225 Difference]: With dead ends: 5151 [2021-06-12 21:34:29,456 INFO L226 Difference]: Without dead ends: 5117 [2021-06-12 21:34:29,456 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1856.7ms TimeCoverageRelationStatistics Valid=518, Invalid=3264, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 21:34:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-06-12 21:34:29,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4671. [2021-06-12 21:34:29,507 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) [2021-06-12 21:34:29,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4671 states to 4671 states and 11710 transitions. [2021-06-12 21:34:29,512 INFO L78 Accepts]: Start accepts. Automaton has 4671 states and 11710 transitions. Word has length 30 [2021-06-12 21:34:29,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:29,513 INFO L482 AbstractCegarLoop]: Abstraction has 4671 states and 11710 transitions. [2021-06-12 21:34:29,513 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) [2021-06-12 21:34:29,513 INFO L276 IsEmpty]: Start isEmpty. Operand 4671 states and 11710 transitions. [2021-06-12 21:34:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:29,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:29,516 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:29,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:29,717 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:29,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1813763767, now seen corresponding path program 88 times [2021-06-12 21:34:29,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:29,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952143445] [2021-06-12 21:34:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:29,901 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:29,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:29,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952143445] [2021-06-12 21:34:29,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952143445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:29,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838949190] [2021-06-12 21:34:29,901 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 [2021-06-12 21:34:29,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:34:29,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:29,924 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:29,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:30,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,178 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:30,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,181 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:30,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:30,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:30,183 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:30,183 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 [2021-06-12 21:34:30,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:30,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:30,189 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:30,189 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:30,205 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:30,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838949190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:30,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:30,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:34:30,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265972902] [2021-06-12 21:34:30,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:30,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:30,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:30,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:34:30,207 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) [2021-06-12 21:34:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:31,280 INFO L93 Difference]: Finished difference Result 5215 states and 12829 transitions. [2021-06-12 21:34:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 21:34:31,280 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 [2021-06-12 21:34:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:31,284 INFO L225 Difference]: With dead ends: 5215 [2021-06-12 21:34:31,284 INFO L226 Difference]: Without dead ends: 5184 [2021-06-12 21:34:31,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 542 ImplicationChecksByTransitivity, 870.7ms TimeCoverageRelationStatistics Valid=276, Invalid=1704, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 21:34:31,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-06-12 21:34:31,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 4822. [2021-06-12 21:34:31,329 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) [2021-06-12 21:34:31,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4822 states to 4822 states and 12138 transitions. [2021-06-12 21:34:31,335 INFO L78 Accepts]: Start accepts. Automaton has 4822 states and 12138 transitions. Word has length 30 [2021-06-12 21:34:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:31,336 INFO L482 AbstractCegarLoop]: Abstraction has 4822 states and 12138 transitions. [2021-06-12 21:34:31,336 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) [2021-06-12 21:34:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 4822 states and 12138 transitions. [2021-06-12 21:34:31,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:31,340 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:31,340 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:31,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:31,540 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:31,540 INFO L82 PathProgramCache]: Analyzing trace with hash 409447283, now seen corresponding path program 89 times [2021-06-12 21:34:31,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:31,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030614115] [2021-06-12 21:34:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:31,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:31,738 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:31,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:31,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030614115] [2021-06-12 21:34:31,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030614115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:31,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930618525] [2021-06-12 21:34:31,739 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 [2021-06-12 21:34:31,762 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:34:31,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:31,763 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:31,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:32,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:32,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:32,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:32,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:32,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:32,011 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:32,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:32,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:32,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:32,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:32,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:32,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:32,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:32,016 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 [2021-06-12 21:34:32,016 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:32,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:32,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:32,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:32,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930618525] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:32,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:32,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-06-12 21:34:32,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899449744] [2021-06-12 21:34:32,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:32,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:32,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:32,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:34:32,042 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) [2021-06-12 21:34:33,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:33,710 INFO L93 Difference]: Finished difference Result 5370 states and 13300 transitions. [2021-06-12 21:34:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:34:33,711 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 [2021-06-12 21:34:33,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:33,716 INFO L225 Difference]: With dead ends: 5370 [2021-06-12 21:34:33,716 INFO L226 Difference]: Without dead ends: 5304 [2021-06-12 21:34:33,717 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 1537.8ms TimeCoverageRelationStatistics Valid=473, Invalid=2833, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:34:33,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5304 states. [2021-06-12 21:34:33,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5304 to 4896. [2021-06-12 21:34:33,764 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) [2021-06-12 21:34:33,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4896 states to 4896 states and 12307 transitions. [2021-06-12 21:34:33,770 INFO L78 Accepts]: Start accepts. Automaton has 4896 states and 12307 transitions. Word has length 30 [2021-06-12 21:34:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:33,770 INFO L482 AbstractCegarLoop]: Abstraction has 4896 states and 12307 transitions. [2021-06-12 21:34:33,770 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) [2021-06-12 21:34:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4896 states and 12307 transitions. [2021-06-12 21:34:33,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:33,774 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:33,774 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:33,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:33,975 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:33,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:33,975 INFO L82 PathProgramCache]: Analyzing trace with hash 203508851, now seen corresponding path program 90 times [2021-06-12 21:34:33,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:33,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857184551] [2021-06-12 21:34:33,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:34,240 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:34,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857184551] [2021-06-12 21:34:34,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857184551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:34,240 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044524038] [2021-06-12 21:34:34,240 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 [2021-06-12 21:34:34,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 21:34:34,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:34,267 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:34:34,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:34,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:34,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:34,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:34,703 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:34,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:34,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:34,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:34,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:34,759 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 [2021-06-12 21:34:34,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:34:34,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:34,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:34,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:88, output treesize:41 [2021-06-12 21:34:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:34,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044524038] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:34,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:34,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-06-12 21:34:34,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401412211] [2021-06-12 21:34:34,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 21:34:34,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:34,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 21:34:34,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-06-12 21:34:34,973 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) [2021-06-12 21:34:36,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:36,755 INFO L93 Difference]: Finished difference Result 5271 states and 13100 transitions. [2021-06-12 21:34:36,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 21:34:36,755 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 [2021-06-12 21:34:36,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:36,760 INFO L225 Difference]: With dead ends: 5271 [2021-06-12 21:34:36,760 INFO L226 Difference]: Without dead ends: 5223 [2021-06-12 21:34:36,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1714.2ms TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:34:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5223 states. [2021-06-12 21:34:36,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5223 to 4919. [2021-06-12 21:34:36,804 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) [2021-06-12 21:34:36,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 12355 transitions. [2021-06-12 21:34:36,810 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 12355 transitions. Word has length 30 [2021-06-12 21:34:36,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:36,810 INFO L482 AbstractCegarLoop]: Abstraction has 4919 states and 12355 transitions. [2021-06-12 21:34:36,810 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) [2021-06-12 21:34:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 12355 transitions. [2021-06-12 21:34:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-12 21:34:36,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:36,814 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:37,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable549 [2021-06-12 21:34:37,015 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:37,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:37,015 INFO L82 PathProgramCache]: Analyzing trace with hash -134828685, now seen corresponding path program 91 times [2021-06-12 21:34:37,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:37,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591389613] [2021-06-12 21:34:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:37,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:37,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591389613] [2021-06-12 21:34:37,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591389613] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:37,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118854074] [2021-06-12 21:34:37,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:34:37,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:37,288 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 21:34:37,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:37,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:37,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:37,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:37,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:37,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:37,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:37,507 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:37,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:37,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:37,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:37,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:34:37,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:37,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:34:37,510 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 [2021-06-12 21:34:37,511 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:34:37,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:34:37,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:34:37,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-06-12 21:34:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:37,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118854074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:37,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:37,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-06-12 21:34:37,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465378907] [2021-06-12 21:34:37,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:34:37,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:37,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:34:37,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:34:37,538 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) [2021-06-12 21:34:39,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:39,281 INFO L93 Difference]: Finished difference Result 5304 states and 13161 transitions. [2021-06-12 21:34:39,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 21:34:39,281 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 [2021-06-12 21:34:39,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:39,286 INFO L225 Difference]: With dead ends: 5304 [2021-06-12 21:34:39,286 INFO L226 Difference]: Without dead ends: 5284 [2021-06-12 21:34:39,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 1628.0ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 21:34:39,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2021-06-12 21:34:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 4960. [2021-06-12 21:34:39,328 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) [2021-06-12 21:34:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4960 states to 4960 states and 12467 transitions. [2021-06-12 21:34:39,334 INFO L78 Accepts]: Start accepts. Automaton has 4960 states and 12467 transitions. Word has length 30 [2021-06-12 21:34:39,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:39,334 INFO L482 AbstractCegarLoop]: Abstraction has 4960 states and 12467 transitions. [2021-06-12 21:34:39,334 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) [2021-06-12 21:34:39,334 INFO L276 IsEmpty]: Start isEmpty. Operand 4960 states and 12467 transitions. [2021-06-12 21:34:39,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:39,338 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:39,338 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:39,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-12 21:34:39,539 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:39,539 INFO L82 PathProgramCache]: Analyzing trace with hash -672367353, now seen corresponding path program 92 times [2021-06-12 21:34:39,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:39,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648549150] [2021-06-12 21:34:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:39,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:39,632 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:39,632 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:39,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648549150] [2021-06-12 21:34:39,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648549150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:39,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738943837] [2021-06-12 21:34:39,633 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 [2021-06-12 21:34:39,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:34:39,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:39,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:39,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:39,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738943837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:39,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:39,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:34:39,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858879641] [2021-06-12 21:34:39,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:39,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:39,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:39,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:39,860 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) [2021-06-12 21:34:40,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:40,887 INFO L93 Difference]: Finished difference Result 6004 states and 14671 transitions. [2021-06-12 21:34:40,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:34:40,887 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 [2021-06-12 21:34:40,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:40,893 INFO L225 Difference]: With dead ends: 6004 [2021-06-12 21:34:40,893 INFO L226 Difference]: Without dead ends: 6004 [2021-06-12 21:34:40,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 959.4ms TimeCoverageRelationStatistics Valid=1225, Invalid=3467, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 21:34:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6004 states. [2021-06-12 21:34:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6004 to 4735. [2021-06-12 21:34:40,936 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) [2021-06-12 21:34:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4735 states to 4735 states and 11889 transitions. [2021-06-12 21:34:40,942 INFO L78 Accepts]: Start accepts. Automaton has 4735 states and 11889 transitions. Word has length 32 [2021-06-12 21:34:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:40,942 INFO L482 AbstractCegarLoop]: Abstraction has 4735 states and 11889 transitions. [2021-06-12 21:34:40,942 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) [2021-06-12 21:34:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 4735 states and 11889 transitions. [2021-06-12 21:34:40,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:40,946 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:40,946 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:41,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-12 21:34:41,147 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:41,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:41,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1632455975, now seen corresponding path program 93 times [2021-06-12 21:34:41,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:41,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625778849] [2021-06-12 21:34:41,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:41,227 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:41,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:41,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625778849] [2021-06-12 21:34:41,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625778849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:41,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770818277] [2021-06-12 21:34:41,227 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 [2021-06-12 21:34:41,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:34:41,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:41,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:41,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:41,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770818277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:41,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:41,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:34:41,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309610437] [2021-06-12 21:34:41,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:41,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:41,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:41,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:41,462 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) [2021-06-12 21:34:42,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:42,937 INFO L93 Difference]: Finished difference Result 7971 states and 19194 transitions. [2021-06-12 21:34:42,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-06-12 21:34:42,938 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 [2021-06-12 21:34:42,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:42,944 INFO L225 Difference]: With dead ends: 7971 [2021-06-12 21:34:42,944 INFO L226 Difference]: Without dead ends: 7867 [2021-06-12 21:34:42,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2358 ImplicationChecksByTransitivity, 1381.1ms TimeCoverageRelationStatistics Valid=1727, Invalid=5929, Unknown=0, NotChecked=0, Total=7656 [2021-06-12 21:34:42,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7867 states. [2021-06-12 21:34:43,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7867 to 5211. [2021-06-12 21:34:43,007 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) [2021-06-12 21:34:43,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5211 states to 5211 states and 13181 transitions. [2021-06-12 21:34:43,013 INFO L78 Accepts]: Start accepts. Automaton has 5211 states and 13181 transitions. Word has length 32 [2021-06-12 21:34:43,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:43,013 INFO L482 AbstractCegarLoop]: Abstraction has 5211 states and 13181 transitions. [2021-06-12 21:34:43,013 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) [2021-06-12 21:34:43,013 INFO L276 IsEmpty]: Start isEmpty. Operand 5211 states and 13181 transitions. [2021-06-12 21:34:43,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:43,017 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:43,018 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:43,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:43,218 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:43,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:43,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1308512999, now seen corresponding path program 94 times [2021-06-12 21:34:43,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:43,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507930515] [2021-06-12 21:34:43,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:43,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:43,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:43,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507930515] [2021-06-12 21:34:43,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507930515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:43,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492355524] [2021-06-12 21:34:43,269 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 [2021-06-12 21:34:43,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:34:43,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:43,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:43,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:43,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492355524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:43,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:43,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-12 21:34:43,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90501605] [2021-06-12 21:34:43,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:34:43,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:43,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:34:43,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:34:43,470 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) [2021-06-12 21:34:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:44,703 INFO L93 Difference]: Finished difference Result 9415 states and 23381 transitions. [2021-06-12 21:34:44,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 21:34:44,703 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 [2021-06-12 21:34:44,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:44,712 INFO L225 Difference]: With dead ends: 9415 [2021-06-12 21:34:44,712 INFO L226 Difference]: Without dead ends: 9411 [2021-06-12 21:34:44,712 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1074.1ms TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-06-12 21:34:44,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9411 states. [2021-06-12 21:34:44,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9411 to 6840. [2021-06-12 21:34:44,797 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) [2021-06-12 21:34:44,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 17406 transitions. [2021-06-12 21:34:44,810 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 17406 transitions. Word has length 32 [2021-06-12 21:34:44,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:44,810 INFO L482 AbstractCegarLoop]: Abstraction has 6840 states and 17406 transitions. [2021-06-12 21:34:44,810 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) [2021-06-12 21:34:44,811 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 17406 transitions. [2021-06-12 21:34:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:44,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:44,818 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:45,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:45,031 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:45,031 INFO L82 PathProgramCache]: Analyzing trace with hash 976834211, now seen corresponding path program 95 times [2021-06-12 21:34:45,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:45,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322279294] [2021-06-12 21:34:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:45,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:45,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322279294] [2021-06-12 21:34:45,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322279294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:45,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249064282] [2021-06-12 21:34:45,083 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 [2021-06-12 21:34:45,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 21:34:45,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:45,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:45,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:45,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249064282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:45,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:45,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-12 21:34:45,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736522009] [2021-06-12 21:34:45,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:34:45,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:34:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:34:45,284 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) [2021-06-12 21:34:46,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:46,236 INFO L93 Difference]: Finished difference Result 7287 states and 18264 transitions. [2021-06-12 21:34:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:34:46,237 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 [2021-06-12 21:34:46,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:46,243 INFO L225 Difference]: With dead ends: 7287 [2021-06-12 21:34:46,244 INFO L226 Difference]: Without dead ends: 7283 [2021-06-12 21:34:46,244 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 880.1ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 21:34:46,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7283 states. [2021-06-12 21:34:46,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7283 to 6779. [2021-06-12 21:34:46,308 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) [2021-06-12 21:34:46,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6779 states to 6779 states and 17255 transitions. [2021-06-12 21:34:46,317 INFO L78 Accepts]: Start accepts. Automaton has 6779 states and 17255 transitions. Word has length 32 [2021-06-12 21:34:46,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:46,317 INFO L482 AbstractCegarLoop]: Abstraction has 6779 states and 17255 transitions. [2021-06-12 21:34:46,317 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) [2021-06-12 21:34:46,317 INFO L276 IsEmpty]: Start isEmpty. Operand 6779 states and 17255 transitions. [2021-06-12 21:34:46,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:46,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:46,322 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:46,522 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-06-12 21:34:46,523 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:46,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:46,523 INFO L82 PathProgramCache]: Analyzing trace with hash 542563561, now seen corresponding path program 96 times [2021-06-12 21:34:46,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:46,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693116254] [2021-06-12 21:34:46,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:46,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:46,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693116254] [2021-06-12 21:34:46,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693116254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:46,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901130912] [2021-06-12 21:34:46,574 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 [2021-06-12 21:34:46,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:34:46,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:46,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:46,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:46,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901130912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:46,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:46,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-12 21:34:46,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750263082] [2021-06-12 21:34:46,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:34:46,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:34:46,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:34:46,781 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) [2021-06-12 21:34:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:47,543 INFO L93 Difference]: Finished difference Result 8864 states and 22216 transitions. [2021-06-12 21:34:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 21:34:47,543 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 [2021-06-12 21:34:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:47,551 INFO L225 Difference]: With dead ends: 8864 [2021-06-12 21:34:47,551 INFO L226 Difference]: Without dead ends: 8852 [2021-06-12 21:34:47,552 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 641.6ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 21:34:47,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2021-06-12 21:34:47,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 7049. [2021-06-12 21:34:47,633 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) [2021-06-12 21:34:47,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7049 states to 7049 states and 18009 transitions. [2021-06-12 21:34:47,643 INFO L78 Accepts]: Start accepts. Automaton has 7049 states and 18009 transitions. Word has length 32 [2021-06-12 21:34:47,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:47,643 INFO L482 AbstractCegarLoop]: Abstraction has 7049 states and 18009 transitions. [2021-06-12 21:34:47,643 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) [2021-06-12 21:34:47,643 INFO L276 IsEmpty]: Start isEmpty. Operand 7049 states and 18009 transitions. [2021-06-12 21:34:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:47,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:47,648 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:47,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:47,848 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:47,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:47,848 INFO L82 PathProgramCache]: Analyzing trace with hash 987096583, now seen corresponding path program 97 times [2021-06-12 21:34:47,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:47,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239213635] [2021-06-12 21:34:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:47,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:47,901 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:47,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:47,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239213635] [2021-06-12 21:34:47,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239213635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:47,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751472810] [2021-06-12 21:34:47,902 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 [2021-06-12 21:34:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:47,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:48,161 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:48,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751472810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:48,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:48,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-12 21:34:48,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092407084] [2021-06-12 21:34:48,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:34:48,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:48,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:34:48,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:34:48,162 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) [2021-06-12 21:34:49,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:49,153 INFO L93 Difference]: Finished difference Result 8195 states and 20473 transitions. [2021-06-12 21:34:49,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:34:49,153 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 [2021-06-12 21:34:49,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:49,162 INFO L225 Difference]: With dead ends: 8195 [2021-06-12 21:34:49,162 INFO L226 Difference]: Without dead ends: 8183 [2021-06-12 21:34:49,162 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 927.3ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 21:34:49,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8183 states. [2021-06-12 21:34:49,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8183 to 7241. [2021-06-12 21:34:49,233 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) [2021-06-12 21:34:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7241 states to 7241 states and 18560 transitions. [2021-06-12 21:34:49,243 INFO L78 Accepts]: Start accepts. Automaton has 7241 states and 18560 transitions. Word has length 32 [2021-06-12 21:34:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:49,243 INFO L482 AbstractCegarLoop]: Abstraction has 7241 states and 18560 transitions. [2021-06-12 21:34:49,243 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) [2021-06-12 21:34:49,243 INFO L276 IsEmpty]: Start isEmpty. Operand 7241 states and 18560 transitions. [2021-06-12 21:34:49,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:49,248 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:49,248 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:49,448 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:49,448 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:49,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1995895033, now seen corresponding path program 98 times [2021-06-12 21:34:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:49,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053092144] [2021-06-12 21:34:49,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:49,508 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:49,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:49,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053092144] [2021-06-12 21:34:49,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053092144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:49,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502941793] [2021-06-12 21:34:49,509 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 [2021-06-12 21:34:49,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:34:49,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:49,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:49,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:49,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502941793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:49,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:49,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 21:34:49,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072136139] [2021-06-12 21:34:49,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:49,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:49,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:49,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:34:49,706 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) [2021-06-12 21:34:50,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:50,716 INFO L93 Difference]: Finished difference Result 8748 states and 21799 transitions. [2021-06-12 21:34:50,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-12 21:34:50,717 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 [2021-06-12 21:34:50,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:50,726 INFO L225 Difference]: With dead ends: 8748 [2021-06-12 21:34:50,726 INFO L226 Difference]: Without dead ends: 8722 [2021-06-12 21:34:50,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 902.7ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 21:34:50,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2021-06-12 21:34:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 7346. [2021-06-12 21:34:50,819 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) [2021-06-12 21:34:50,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7346 states to 7346 states and 18876 transitions. [2021-06-12 21:34:50,831 INFO L78 Accepts]: Start accepts. Automaton has 7346 states and 18876 transitions. Word has length 32 [2021-06-12 21:34:50,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:50,832 INFO L482 AbstractCegarLoop]: Abstraction has 7346 states and 18876 transitions. [2021-06-12 21:34:50,832 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) [2021-06-12 21:34:50,832 INFO L276 IsEmpty]: Start isEmpty. Operand 7346 states and 18876 transitions. [2021-06-12 21:34:50,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:50,837 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:50,837 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:51,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable582 [2021-06-12 21:34:51,038 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:51,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash 387315719, now seen corresponding path program 99 times [2021-06-12 21:34:51,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:51,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318530760] [2021-06-12 21:34:51,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:51,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:51,117 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:51,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:51,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318530760] [2021-06-12 21:34:51,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318530760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:51,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478553655] [2021-06-12 21:34:51,117 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 [2021-06-12 21:34:51,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 21:34:51,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:51,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:51,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:51,350 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:51,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478553655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:51,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:51,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 21:34:51,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128963795] [2021-06-12 21:34:51,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:34:51,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:51,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:34:51,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:34:51,351 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) [2021-06-12 21:34:52,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:52,328 INFO L93 Difference]: Finished difference Result 9131 states and 22754 transitions. [2021-06-12 21:34:52,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 21:34:52,329 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 [2021-06-12 21:34:52,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:52,338 INFO L225 Difference]: With dead ends: 9131 [2021-06-12 21:34:52,338 INFO L226 Difference]: Without dead ends: 9101 [2021-06-12 21:34:52,338 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 910.7ms TimeCoverageRelationStatistics Valid=1246, Invalid=4010, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 21:34:52,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9101 states. [2021-06-12 21:34:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9101 to 6682. [2021-06-12 21:34:52,422 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) [2021-06-12 21:34:52,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6682 states to 6682 states and 17168 transitions. [2021-06-12 21:34:52,431 INFO L78 Accepts]: Start accepts. Automaton has 6682 states and 17168 transitions. Word has length 32 [2021-06-12 21:34:52,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:52,431 INFO L482 AbstractCegarLoop]: Abstraction has 6682 states and 17168 transitions. [2021-06-12 21:34:52,431 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) [2021-06-12 21:34:52,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6682 states and 17168 transitions. [2021-06-12 21:34:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:52,436 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:52,436 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:52,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:34:52,636 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:52,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:52,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1126651079, now seen corresponding path program 100 times [2021-06-12 21:34:52,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:52,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504459124] [2021-06-12 21:34:52,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:52,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504459124] [2021-06-12 21:34:52,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504459124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:52,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133067526] [2021-06-12 21:34:52,724 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 [2021-06-12 21:34:52,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:34:52,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:52,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:52,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:52,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133067526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:52,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:52,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:34:52,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655077905] [2021-06-12 21:34:52,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:34:52,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:52,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:34:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:34:52,928 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) [2021-06-12 21:34:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:54,011 INFO L93 Difference]: Finished difference Result 8276 states and 20409 transitions. [2021-06-12 21:34:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:34:54,011 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 [2021-06-12 21:34:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:54,019 INFO L225 Difference]: With dead ends: 8276 [2021-06-12 21:34:54,019 INFO L226 Difference]: Without dead ends: 8276 [2021-06-12 21:34:54,019 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 952.6ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 21:34:54,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8276 states. [2021-06-12 21:34:54,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8276 to 6034. [2021-06-12 21:34:54,081 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) [2021-06-12 21:34:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6034 states to 6034 states and 15410 transitions. [2021-06-12 21:34:54,089 INFO L78 Accepts]: Start accepts. Automaton has 6034 states and 15410 transitions. Word has length 32 [2021-06-12 21:34:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:54,089 INFO L482 AbstractCegarLoop]: Abstraction has 6034 states and 15410 transitions. [2021-06-12 21:34:54,090 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) [2021-06-12 21:34:54,090 INFO L276 IsEmpty]: Start isEmpty. Operand 6034 states and 15410 transitions. [2021-06-12 21:34:54,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:54,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:54,094 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:54,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-06-12 21:34:54,295 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:54,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:54,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1001568577, now seen corresponding path program 101 times [2021-06-12 21:34:54,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:54,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863137710] [2021-06-12 21:34:54,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:54,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:54,360 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:54,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:54,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863137710] [2021-06-12 21:34:54,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863137710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:54,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905688836] [2021-06-12 21:34:54,361 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 [2021-06-12 21:34:54,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 21:34:54,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:54,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:54,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:54,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905688836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:54,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:54,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 21:34:54,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242648498] [2021-06-12 21:34:54,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:34:54,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:54,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:34:54,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:34:54,590 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) [2021-06-12 21:34:55,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:55,629 INFO L93 Difference]: Finished difference Result 7180 states and 17683 transitions. [2021-06-12 21:34:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 21:34:55,629 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 [2021-06-12 21:34:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:55,635 INFO L225 Difference]: With dead ends: 7180 [2021-06-12 21:34:55,635 INFO L226 Difference]: Without dead ends: 7114 [2021-06-12 21:34:55,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 987.4ms TimeCoverageRelationStatistics Valid=1147, Invalid=4109, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 21:34:55,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7114 states. [2021-06-12 21:34:55,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7114 to 6028. [2021-06-12 21:34:55,693 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) [2021-06-12 21:34:55,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6028 states to 6028 states and 15388 transitions. [2021-06-12 21:34:55,701 INFO L78 Accepts]: Start accepts. Automaton has 6028 states and 15388 transitions. Word has length 32 [2021-06-12 21:34:55,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:55,701 INFO L482 AbstractCegarLoop]: Abstraction has 6028 states and 15388 transitions. [2021-06-12 21:34:55,701 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) [2021-06-12 21:34:55,701 INFO L276 IsEmpty]: Start isEmpty. Operand 6028 states and 15388 transitions. [2021-06-12 21:34:55,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:55,704 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:55,704 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:55,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable585 [2021-06-12 21:34:55,905 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:55,905 INFO L82 PathProgramCache]: Analyzing trace with hash -32333067, now seen corresponding path program 102 times [2021-06-12 21:34:55,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:55,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983165480] [2021-06-12 21:34:55,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:56,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:56,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983165480] [2021-06-12 21:34:56,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983165480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:56,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856987752] [2021-06-12 21:34:56,005 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 [2021-06-12 21:34:56,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 21:34:56,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:56,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:56,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:56,211 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:56,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856987752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:56,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:56,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 21:34:56,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278179438] [2021-06-12 21:34:56,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:34:56,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:56,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:34:56,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:34:56,212 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) [2021-06-12 21:34:57,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:57,395 INFO L93 Difference]: Finished difference Result 8027 states and 19692 transitions. [2021-06-12 21:34:57,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 21:34:57,395 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 [2021-06-12 21:34:57,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:57,403 INFO L225 Difference]: With dead ends: 8027 [2021-06-12 21:34:57,403 INFO L226 Difference]: Without dead ends: 8027 [2021-06-12 21:34:57,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1659 ImplicationChecksByTransitivity, 1031.5ms TimeCoverageRelationStatistics Valid=1499, Invalid=4051, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 21:34:57,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8027 states. [2021-06-12 21:34:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8027 to 5454. [2021-06-12 21:34:57,478 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) [2021-06-12 21:34:57,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13779 transitions. [2021-06-12 21:34:57,485 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13779 transitions. Word has length 32 [2021-06-12 21:34:57,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:57,485 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13779 transitions. [2021-06-12 21:34:57,485 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) [2021-06-12 21:34:57,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13779 transitions. [2021-06-12 21:34:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:57,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:57,489 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:57,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-06-12 21:34:57,690 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:57,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:57,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1252561661, now seen corresponding path program 103 times [2021-06-12 21:34:57,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:57,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777427477] [2021-06-12 21:34:57,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:57,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:57,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:57,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777427477] [2021-06-12 21:34:57,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777427477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:57,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814042823] [2021-06-12 21:34:57,748 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 [2021-06-12 21:34:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:57,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:57,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814042823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:57,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:57,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 21:34:57,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486302536] [2021-06-12 21:34:57,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:57,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:57,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:57,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:34:57,941 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) [2021-06-12 21:34:58,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:34:58,868 INFO L93 Difference]: Finished difference Result 6472 states and 15876 transitions. [2021-06-12 21:34:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 21:34:58,868 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 [2021-06-12 21:34:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:34:58,874 INFO L225 Difference]: With dead ends: 6472 [2021-06-12 21:34:58,874 INFO L226 Difference]: Without dead ends: 6433 [2021-06-12 21:34:58,874 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 813.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3454, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 21:34:58,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6433 states. [2021-06-12 21:34:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6433 to 5454. [2021-06-12 21:34:58,946 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) [2021-06-12 21:34:58,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5454 states to 5454 states and 13764 transitions. [2021-06-12 21:34:58,953 INFO L78 Accepts]: Start accepts. Automaton has 5454 states and 13764 transitions. Word has length 32 [2021-06-12 21:34:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:34:58,953 INFO L482 AbstractCegarLoop]: Abstraction has 5454 states and 13764 transitions. [2021-06-12 21:34:58,953 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) [2021-06-12 21:34:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 5454 states and 13764 transitions. [2021-06-12 21:34:58,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:34:58,958 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:34:58,958 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:34:59,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-12 21:34:59,173 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:34:59,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:34:59,173 INFO L82 PathProgramCache]: Analyzing trace with hash -180243655, now seen corresponding path program 104 times [2021-06-12 21:34:59,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:34:59,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103036455] [2021-06-12 21:34:59,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:34:59,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:34:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:34:59,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:34:59,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103036455] [2021-06-12 21:34:59,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103036455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:59,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5475818] [2021-06-12 21:34:59,234 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 [2021-06-12 21:34:59,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:34:59,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:34:59,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:34:59,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:34:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:34:59,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5475818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:34:59,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:34:59,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 21:34:59,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651628279] [2021-06-12 21:34:59,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:34:59,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:34:59,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:34:59,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:34:59,429 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) [2021-06-12 21:35:00,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:00,721 INFO L93 Difference]: Finished difference Result 8061 states and 19706 transitions. [2021-06-12 21:35:00,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 21:35:00,721 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 [2021-06-12 21:35:00,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:00,729 INFO L225 Difference]: With dead ends: 8061 [2021-06-12 21:35:00,729 INFO L226 Difference]: Without dead ends: 8061 [2021-06-12 21:35:00,729 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 1103.2ms TimeCoverageRelationStatistics Valid=1768, Invalid=4552, Unknown=0, NotChecked=0, Total=6320 [2021-06-12 21:35:00,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8061 states. [2021-06-12 21:35:00,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8061 to 6057. [2021-06-12 21:35:00,815 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) [2021-06-12 21:35:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6057 states to 6057 states and 15234 transitions. [2021-06-12 21:35:00,824 INFO L78 Accepts]: Start accepts. Automaton has 6057 states and 15234 transitions. Word has length 32 [2021-06-12 21:35:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:00,825 INFO L482 AbstractCegarLoop]: Abstraction has 6057 states and 15234 transitions. [2021-06-12 21:35:00,825 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) [2021-06-12 21:35:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 6057 states and 15234 transitions. [2021-06-12 21:35:00,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:35:00,829 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:00,830 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:01,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:01,030 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:01,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:01,030 INFO L82 PathProgramCache]: Analyzing trace with hash 729918393, now seen corresponding path program 105 times [2021-06-12 21:35:01,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:01,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188525783] [2021-06-12 21:35:01,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:01,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:01,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:01,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188525783] [2021-06-12 21:35:01,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188525783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:01,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499643875] [2021-06-12 21:35:01,086 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 [2021-06-12 21:35:01,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 21:35:01,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:01,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:35:01,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:01,284 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:01,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499643875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:01,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:01,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-12 21:35:01,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917719599] [2021-06-12 21:35:01,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:35:01,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:01,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:35:01,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:35:01,285 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) [2021-06-12 21:35:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:02,214 INFO L93 Difference]: Finished difference Result 6889 states and 16992 transitions. [2021-06-12 21:35:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:35:02,214 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 [2021-06-12 21:35:02,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:02,220 INFO L225 Difference]: With dead ends: 6889 [2021-06-12 21:35:02,220 INFO L226 Difference]: Without dead ends: 6871 [2021-06-12 21:35:02,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 771.1ms TimeCoverageRelationStatistics Valid=879, Invalid=3027, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:35:02,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6871 states. [2021-06-12 21:35:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6871 to 6077. [2021-06-12 21:35:02,300 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) [2021-06-12 21:35:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6077 states to 6077 states and 15298 transitions. [2021-06-12 21:35:02,308 INFO L78 Accepts]: Start accepts. Automaton has 6077 states and 15298 transitions. Word has length 32 [2021-06-12 21:35:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:02,309 INFO L482 AbstractCegarLoop]: Abstraction has 6077 states and 15298 transitions. [2021-06-12 21:35:02,309 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) [2021-06-12 21:35:02,309 INFO L276 IsEmpty]: Start isEmpty. Operand 6077 states and 15298 transitions. [2021-06-12 21:35:02,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:35:02,314 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:02,314 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:02,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:02,514 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:02,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:02,515 INFO L82 PathProgramCache]: Analyzing trace with hash -853693707, now seen corresponding path program 106 times [2021-06-12 21:35:02,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:02,515 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803736625] [2021-06-12 21:35:02,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:02,572 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:02,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:02,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803736625] [2021-06-12 21:35:02,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803736625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:02,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789548271] [2021-06-12 21:35:02,573 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 [2021-06-12 21:35:02,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:35:02,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:02,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:35:02,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:02,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789548271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:02,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:02,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-12 21:35:02,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217237959] [2021-06-12 21:35:02,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:35:02,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:02,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:35:02,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:35:02,774 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) [2021-06-12 21:35:04,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:04,131 INFO L93 Difference]: Finished difference Result 10330 states and 25935 transitions. [2021-06-12 21:35:04,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-06-12 21:35:04,132 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 [2021-06-12 21:35:04,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:04,141 INFO L225 Difference]: With dead ends: 10330 [2021-06-12 21:35:04,142 INFO L226 Difference]: Without dead ends: 10330 [2021-06-12 21:35:04,142 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 1168.6ms TimeCoverageRelationStatistics Valid=2010, Invalid=4962, Unknown=0, NotChecked=0, Total=6972 [2021-06-12 21:35:04,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10330 states. [2021-06-12 21:35:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10330 to 9091. [2021-06-12 21:35:04,251 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) [2021-06-12 21:35:04,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9091 states to 9091 states and 23338 transitions. [2021-06-12 21:35:04,264 INFO L78 Accepts]: Start accepts. Automaton has 9091 states and 23338 transitions. Word has length 32 [2021-06-12 21:35:04,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:04,264 INFO L482 AbstractCegarLoop]: Abstraction has 9091 states and 23338 transitions. [2021-06-12 21:35:04,265 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) [2021-06-12 21:35:04,265 INFO L276 IsEmpty]: Start isEmpty. Operand 9091 states and 23338 transitions. [2021-06-12 21:35:04,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:35:04,271 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:04,271 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:04,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-06-12 21:35:04,472 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1689192365, now seen corresponding path program 107 times [2021-06-12 21:35:04,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:04,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5198879] [2021-06-12 21:35:04,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:04,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:04,546 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:04,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:04,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5198879] [2021-06-12 21:35:04,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5198879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:04,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512574508] [2021-06-12 21:35:04,547 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 [2021-06-12 21:35:04,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:35:04,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:04,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:35:04,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:04,742 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:04,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512574508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:04,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:04,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-06-12 21:35:04,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159754646] [2021-06-12 21:35:04,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 21:35:04,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:04,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 21:35:04,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-06-12 21:35:04,743 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) [2021-06-12 21:35:05,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:05,603 INFO L93 Difference]: Finished difference Result 10140 states and 25474 transitions. [2021-06-12 21:35:05,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:35:05,603 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 [2021-06-12 21:35:05,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:05,616 INFO L225 Difference]: With dead ends: 10140 [2021-06-12 21:35:05,616 INFO L226 Difference]: Without dead ends: 10136 [2021-06-12 21:35:05,616 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 748.3ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:35:05,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10136 states. [2021-06-12 21:35:05,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10136 to 8995. [2021-06-12 21:35:05,753 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) [2021-06-12 21:35:05,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8995 states to 8995 states and 23074 transitions. [2021-06-12 21:35:05,766 INFO L78 Accepts]: Start accepts. Automaton has 8995 states and 23074 transitions. Word has length 32 [2021-06-12 21:35:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:05,766 INFO L482 AbstractCegarLoop]: Abstraction has 8995 states and 23074 transitions. [2021-06-12 21:35:05,766 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) [2021-06-12 21:35:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 8995 states and 23074 transitions. [2021-06-12 21:35:05,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:35:05,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:05,772 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:05,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:05,972 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:05,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:05,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1182846099, now seen corresponding path program 108 times [2021-06-12 21:35:05,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:05,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983904019] [2021-06-12 21:35:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:06,030 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:06,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:06,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983904019] [2021-06-12 21:35:06,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983904019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:06,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067063194] [2021-06-12 21:35:06,030 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 [2021-06-12 21:35:06,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:35:06,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:06,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:35:06,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:06,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067063194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:06,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:06,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-06-12 21:35:06,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948357712] [2021-06-12 21:35:06,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 21:35:06,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:06,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 21:35:06,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-06-12 21:35:06,224 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) [2021-06-12 21:35:07,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:07,076 INFO L93 Difference]: Finished difference Result 10548 states and 26516 transitions. [2021-06-12 21:35:07,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:35:07,076 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 [2021-06-12 21:35:07,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:07,088 INFO L225 Difference]: With dead ends: 10548 [2021-06-12 21:35:07,088 INFO L226 Difference]: Without dead ends: 10536 [2021-06-12 21:35:07,089 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 735.7ms TimeCoverageRelationStatistics Valid=1011, Invalid=2895, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:35:07,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10536 states. [2021-06-12 21:35:07,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10536 to 9183. [2021-06-12 21:35:07,235 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) [2021-06-12 21:35:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9183 states to 9183 states and 23585 transitions. [2021-06-12 21:35:07,249 INFO L78 Accepts]: Start accepts. Automaton has 9183 states and 23585 transitions. Word has length 32 [2021-06-12 21:35:07,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:07,249 INFO L482 AbstractCegarLoop]: Abstraction has 9183 states and 23585 transitions. [2021-06-12 21:35:07,250 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) [2021-06-12 21:35:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 9183 states and 23585 transitions. [2021-06-12 21:35:07,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:35:07,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:07,257 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:07,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:07,458 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:07,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:07,459 INFO L82 PathProgramCache]: Analyzing trace with hash 955624719, now seen corresponding path program 109 times [2021-06-12 21:35:07,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:07,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809718986] [2021-06-12 21:35:07,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:07,520 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:07,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:07,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809718986] [2021-06-12 21:35:07,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809718986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:07,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567629345] [2021-06-12 21:35:07,520 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 [2021-06-12 21:35:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:07,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:35:07,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:07,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567629345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:07,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:07,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-06-12 21:35:07,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315648028] [2021-06-12 21:35:07,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 21:35:07,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:07,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 21:35:07,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-06-12 21:35:07,722 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) [2021-06-12 21:35:08,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:08,620 INFO L93 Difference]: Finished difference Result 11364 states and 28535 transitions. [2021-06-12 21:35:08,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-12 21:35:08,621 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 [2021-06-12 21:35:08,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:08,633 INFO L225 Difference]: With dead ends: 11364 [2021-06-12 21:35:08,633 INFO L226 Difference]: Without dead ends: 11344 [2021-06-12 21:35:08,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 780.8ms TimeCoverageRelationStatistics Valid=1025, Invalid=3135, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:35:08,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11344 states. [2021-06-12 21:35:08,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11344 to 10146. [2021-06-12 21:35:08,790 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) [2021-06-12 21:35:08,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10146 states to 10146 states and 26114 transitions. [2021-06-12 21:35:08,805 INFO L78 Accepts]: Start accepts. Automaton has 10146 states and 26114 transitions. Word has length 32 [2021-06-12 21:35:08,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:08,805 INFO L482 AbstractCegarLoop]: Abstraction has 10146 states and 26114 transitions. [2021-06-12 21:35:08,805 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) [2021-06-12 21:35:08,805 INFO L276 IsEmpty]: Start isEmpty. Operand 10146 states and 26114 transitions. [2021-06-12 21:35:08,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:35:08,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:08,812 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:09,012 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:09,013 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:09,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:09,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1639210635, now seen corresponding path program 110 times [2021-06-12 21:35:09,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:09,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710694861] [2021-06-12 21:35:09,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:09,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:09,086 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:09,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710694861] [2021-06-12 21:35:09,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710694861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:09,086 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65643062] [2021-06-12 21:35:09,086 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 [2021-06-12 21:35:09,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:35:09,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:09,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:35:09,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:09,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65643062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:09,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:09,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-06-12 21:35:09,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541747886] [2021-06-12 21:35:09,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 21:35:09,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:09,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 21:35:09,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-06-12 21:35:09,339 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) [2021-06-12 21:35:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:10,315 INFO L93 Difference]: Finished difference Result 12734 states and 32033 transitions. [2021-06-12 21:35:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:35:10,316 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 [2021-06-12 21:35:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:10,333 INFO L225 Difference]: With dead ends: 12734 [2021-06-12 21:35:10,333 INFO L226 Difference]: Without dead ends: 12706 [2021-06-12 21:35:10,333 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 861.5ms TimeCoverageRelationStatistics Valid=1128, Invalid=3564, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 21:35:10,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12706 states. [2021-06-12 21:35:10,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12706 to 11409. [2021-06-12 21:35:10,506 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) [2021-06-12 21:35:10,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11409 states to 11409 states and 29425 transitions. [2021-06-12 21:35:10,523 INFO L78 Accepts]: Start accepts. Automaton has 11409 states and 29425 transitions. Word has length 32 [2021-06-12 21:35:10,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:10,524 INFO L482 AbstractCegarLoop]: Abstraction has 11409 states and 29425 transitions. [2021-06-12 21:35:10,524 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) [2021-06-12 21:35:10,524 INFO L276 IsEmpty]: Start isEmpty. Operand 11409 states and 29425 transitions. [2021-06-12 21:35:10,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 21:35:10,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:10,531 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:10,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable594 [2021-06-12 21:35:10,733 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:10,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:10,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1435279623, now seen corresponding path program 111 times [2021-06-12 21:35:10,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:10,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930460820] [2021-06-12 21:35:10,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:10,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:10,809 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:10,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:10,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930460820] [2021-06-12 21:35:10,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930460820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:10,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148698706] [2021-06-12 21:35:10,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:35:10,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 21:35:10,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:10,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 21:35:10,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:11,023 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:11,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148698706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:11,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:11,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-06-12 21:35:11,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206383117] [2021-06-12 21:35:11,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:35:11,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:11,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:35:11,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:35:11,024 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) [2021-06-12 21:35:12,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:12,120 INFO L93 Difference]: Finished difference Result 12970 states and 32809 transitions. [2021-06-12 21:35:12,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 21:35:12,120 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 [2021-06-12 21:35:12,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:12,132 INFO L225 Difference]: With dead ends: 12970 [2021-06-12 21:35:12,133 INFO L226 Difference]: Without dead ends: 12934 [2021-06-12 21:35:12,133 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 958.9ms TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 21:35:12,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12934 states. [2021-06-12 21:35:12,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12934 to 11759. [2021-06-12 21:35:12,330 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) [2021-06-12 21:35:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30397 transitions. [2021-06-12 21:35:12,354 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30397 transitions. Word has length 32 [2021-06-12 21:35:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:12,354 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30397 transitions. [2021-06-12 21:35:12,354 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) [2021-06-12 21:35:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30397 transitions. [2021-06-12 21:35:12,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:12,364 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:12,364 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:12,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable595 [2021-06-12 21:35:12,564 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:12,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:12,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1812733093, now seen corresponding path program 112 times [2021-06-12 21:35:12,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:12,565 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948098677] [2021-06-12 21:35:12,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:12,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:12,953 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:12,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:12,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948098677] [2021-06-12 21:35:12,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948098677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:12,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471739709] [2021-06-12 21:35:12,954 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 [2021-06-12 21:35:12,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:35:12,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:12,985 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:35:12,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:13,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:13,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,455 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:13,459 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:13,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:13,460 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:13,461 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 [2021-06-12 21:35:13,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:13,466 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:13,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:13,467 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-12 21:35:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:13,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471739709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:13,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:13,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-12 21:35:13,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772165589] [2021-06-12 21:35:13,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:35:13,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:13,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:35:13,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:35:13,487 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) [2021-06-12 21:35:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:16,048 INFO L93 Difference]: Finished difference Result 14875 states and 37756 transitions. [2021-06-12 21:35:16,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:35:16,049 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 [2021-06-12 21:35:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:16,067 INFO L225 Difference]: With dead ends: 14875 [2021-06-12 21:35:16,067 INFO L226 Difference]: Without dead ends: 14868 [2021-06-12 21:35:16,068 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 2452.6ms TimeCoverageRelationStatistics Valid=616, Invalid=3674, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 21:35:16,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14868 states. [2021-06-12 21:35:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14868 to 11941. [2021-06-12 21:35:16,218 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) [2021-06-12 21:35:16,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11941 states to 11941 states and 30868 transitions. [2021-06-12 21:35:16,238 INFO L78 Accepts]: Start accepts. Automaton has 11941 states and 30868 transitions. Word has length 34 [2021-06-12 21:35:16,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:16,238 INFO L482 AbstractCegarLoop]: Abstraction has 11941 states and 30868 transitions. [2021-06-12 21:35:16,238 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) [2021-06-12 21:35:16,238 INFO L276 IsEmpty]: Start isEmpty. Operand 11941 states and 30868 transitions. [2021-06-12 21:35:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:16,247 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:16,247 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:16,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-12 21:35:16,448 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:16,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:16,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1087321293, now seen corresponding path program 113 times [2021-06-12 21:35:16,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:16,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845146368] [2021-06-12 21:35:16,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:16,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:16,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:16,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845146368] [2021-06-12 21:35:16,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845146368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:16,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402995996] [2021-06-12 21:35:16,830 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 [2021-06-12 21:35:16,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:35:16,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:16,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:35:16,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:17,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,213 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:17,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,219 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:17,221 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:17,222 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:17,222 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 [2021-06-12 21:35:17,223 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:17,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:17,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:17,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-12 21:35:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:17,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402995996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:17,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:17,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-12 21:35:17,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437713382] [2021-06-12 21:35:17,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:35:17,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:17,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:35:17,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:35:17,248 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) [2021-06-12 21:35:19,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:19,287 INFO L93 Difference]: Finished difference Result 14838 states and 37704 transitions. [2021-06-12 21:35:19,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 21:35:19,287 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 [2021-06-12 21:35:19,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:19,303 INFO L225 Difference]: With dead ends: 14838 [2021-06-12 21:35:19,304 INFO L226 Difference]: Without dead ends: 14775 [2021-06-12 21:35:19,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1913.9ms TimeCoverageRelationStatistics Valid=462, Invalid=2844, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 21:35:19,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14775 states. [2021-06-12 21:35:19,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14775 to 11996. [2021-06-12 21:35:19,438 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) [2021-06-12 21:35:19,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11996 states to 11996 states and 30993 transitions. [2021-06-12 21:35:19,456 INFO L78 Accepts]: Start accepts. Automaton has 11996 states and 30993 transitions. Word has length 34 [2021-06-12 21:35:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:19,456 INFO L482 AbstractCegarLoop]: Abstraction has 11996 states and 30993 transitions. [2021-06-12 21:35:19,456 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) [2021-06-12 21:35:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 11996 states and 30993 transitions. [2021-06-12 21:35:19,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:19,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:19,465 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:19,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable597,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:19,666 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:19,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:19,666 INFO L82 PathProgramCache]: Analyzing trace with hash -44039697, now seen corresponding path program 114 times [2021-06-12 21:35:19,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:19,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257528794] [2021-06-12 21:35:19,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:20,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:20,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257528794] [2021-06-12 21:35:20,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257528794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:20,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730628432] [2021-06-12 21:35:20,013 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 [2021-06-12 21:35:20,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:35:20,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:20,039 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:35:20,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:20,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:20,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:20,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:20,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:20,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:20,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:20,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:20,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:20,727 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:20,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:20,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:20,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:20,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:20,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:20,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:20,763 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 [2021-06-12 21:35:20,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:35:20,824 INFO L628 ElimStorePlain]: treesize reduction 178, result has 16.4 percent of original size [2021-06-12 21:35:20,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:35:20,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:22 [2021-06-12 21:35:20,888 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:20,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730628432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:20,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:20,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-06-12 21:35:20,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974433841] [2021-06-12 21:35:20,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 21:35:20,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:20,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 21:35:20,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 21:35:20,889 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) [2021-06-12 21:35:23,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:23,398 INFO L93 Difference]: Finished difference Result 15015 states and 38117 transitions. [2021-06-12 21:35:23,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:35:23,399 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 [2021-06-12 21:35:23,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:23,415 INFO L225 Difference]: With dead ends: 15015 [2021-06-12 21:35:23,416 INFO L226 Difference]: Without dead ends: 14957 [2021-06-12 21:35:23,416 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1011 ImplicationChecksByTransitivity, 2355.7ms TimeCoverageRelationStatistics Valid=580, Invalid=3452, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 21:35:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14957 states. [2021-06-12 21:35:23,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14957 to 12104. [2021-06-12 21:35:23,562 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) [2021-06-12 21:35:23,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12104 states to 12104 states and 31219 transitions. [2021-06-12 21:35:23,581 INFO L78 Accepts]: Start accepts. Automaton has 12104 states and 31219 transitions. Word has length 34 [2021-06-12 21:35:23,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:23,581 INFO L482 AbstractCegarLoop]: Abstraction has 12104 states and 31219 transitions. [2021-06-12 21:35:23,581 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) [2021-06-12 21:35:23,581 INFO L276 IsEmpty]: Start isEmpty. Operand 12104 states and 31219 transitions. [2021-06-12 21:35:23,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:23,590 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:23,590 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:23,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-12 21:35:23,792 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1445312427, now seen corresponding path program 115 times [2021-06-12 21:35:23,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:23,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178773356] [2021-06-12 21:35:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:24,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:24,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178773356] [2021-06-12 21:35:24,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178773356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:24,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612520309] [2021-06-12 21:35:24,212 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 [2021-06-12 21:35:24,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:24,237 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:35:24,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:24,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,594 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:24,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,599 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:24,600 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:24,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:24,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:24,601 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 [2021-06-12 21:35:24,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:24,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:24,607 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:24,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-12 21:35:24,626 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:24,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612520309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:24,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:24,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-12 21:35:24,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527157910] [2021-06-12 21:35:24,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:35:24,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:24,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:35:24,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:35:24,627 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) [2021-06-12 21:35:26,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:26,934 INFO L93 Difference]: Finished difference Result 15455 states and 39132 transitions. [2021-06-12 21:35:26,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 21:35:26,935 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 [2021-06-12 21:35:26,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:26,952 INFO L225 Difference]: With dead ends: 15455 [2021-06-12 21:35:26,953 INFO L226 Difference]: Without dead ends: 15407 [2021-06-12 21:35:26,953 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 2182.1ms TimeCoverageRelationStatistics Valid=552, Invalid=3354, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 21:35:26,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15407 states. [2021-06-12 21:35:27,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15407 to 12292. [2021-06-12 21:35:27,109 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) [2021-06-12 21:35:27,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12292 states to 12292 states and 31656 transitions. [2021-06-12 21:35:27,128 INFO L78 Accepts]: Start accepts. Automaton has 12292 states and 31656 transitions. Word has length 34 [2021-06-12 21:35:27,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:27,128 INFO L482 AbstractCegarLoop]: Abstraction has 12292 states and 31656 transitions. [2021-06-12 21:35:27,128 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) [2021-06-12 21:35:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 12292 states and 31656 transitions. [2021-06-12 21:35:27,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:27,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:27,137 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:27,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:27,338 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:27,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:27,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1347182557, now seen corresponding path program 116 times [2021-06-12 21:35:27,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:27,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119591317] [2021-06-12 21:35:27,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:27,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:27,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119591317] [2021-06-12 21:35:27,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119591317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:27,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815096144] [2021-06-12 21:35:27,660 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 [2021-06-12 21:35:27,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:35:27,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:27,685 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:35:27,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:28,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:28,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,016 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,017 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:28,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,018 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:28,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:28,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:28,022 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:28,022 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 [2021-06-12 21:35:28,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:28,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:28,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:28,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-12 21:35:28,049 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:28,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815096144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:28,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:28,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-06-12 21:35:28,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509827549] [2021-06-12 21:35:28,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 21:35:28,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:28,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 21:35:28,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-06-12 21:35:28,051 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) [2021-06-12 21:35:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:30,601 INFO L93 Difference]: Finished difference Result 16292 states and 41059 transitions. [2021-06-12 21:35:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 21:35:30,601 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 [2021-06-12 21:35:30,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:30,618 INFO L225 Difference]: With dead ends: 16292 [2021-06-12 21:35:30,618 INFO L226 Difference]: Without dead ends: 16283 [2021-06-12 21:35:30,618 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 2399.5ms TimeCoverageRelationStatistics Valid=670, Invalid=4586, Unknown=0, NotChecked=0, Total=5256 [2021-06-12 21:35:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16283 states. [2021-06-12 21:35:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16283 to 12441. [2021-06-12 21:35:30,801 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) [2021-06-12 21:35:30,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12441 states to 12441 states and 32047 transitions. [2021-06-12 21:35:30,822 INFO L78 Accepts]: Start accepts. Automaton has 12441 states and 32047 transitions. Word has length 34 [2021-06-12 21:35:30,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:30,822 INFO L482 AbstractCegarLoop]: Abstraction has 12441 states and 32047 transitions. [2021-06-12 21:35:30,822 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) [2021-06-12 21:35:30,822 INFO L276 IsEmpty]: Start isEmpty. Operand 12441 states and 32047 transitions. [2021-06-12 21:35:30,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:30,831 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:30,831 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:31,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable611,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:31,032 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:31,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:31,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1755703351, now seen corresponding path program 117 times [2021-06-12 21:35:31,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:31,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584778083] [2021-06-12 21:35:31,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:31,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:31,279 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:31,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:31,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584778083] [2021-06-12 21:35:31,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584778083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:31,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195106418] [2021-06-12 21:35:31,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 21:35:31,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:35:31,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:31,306 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:35:31,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:32,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:32,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:32,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:32,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:32,887 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:32,888 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:32,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:32,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:32,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:32,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:32,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:32,956 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 [2021-06-12 21:35:33,762 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-06-12 21:35:33,925 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 273 [2021-06-12 21:35:34,198 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 344 DAG size of output: 300 [2021-06-12 21:35:34,568 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-06-12 21:35:34,661 INFO L628 ElimStorePlain]: treesize reduction 1674, result has 2.0 percent of original size [2021-06-12 21:35:34,665 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:35:34,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:22 [2021-06-12 21:35:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:34,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195106418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:34,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:34,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-06-12 21:35:34,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910772991] [2021-06-12 21:35:34,716 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-06-12 21:35:34,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:34,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-06-12 21:35:34,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-06-12 21:35:34,717 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) [2021-06-12 21:35:40,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:40,522 INFO L93 Difference]: Finished difference Result 16489 states and 41364 transitions. [2021-06-12 21:35:40,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 21:35:40,523 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 [2021-06-12 21:35:40,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:40,543 INFO L225 Difference]: With dead ends: 16489 [2021-06-12 21:35:40,543 INFO L226 Difference]: Without dead ends: 16467 [2021-06-12 21:35:40,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1319 ImplicationChecksByTransitivity, 4878.7ms TimeCoverageRelationStatistics Valid=553, Invalid=4417, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 21:35:40,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16467 states. [2021-06-12 21:35:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16467 to 12451. [2021-06-12 21:35:40,712 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) [2021-06-12 21:35:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 32064 transitions. [2021-06-12 21:35:40,734 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 32064 transitions. Word has length 34 [2021-06-12 21:35:40,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:40,734 INFO L482 AbstractCegarLoop]: Abstraction has 12451 states and 32064 transitions. [2021-06-12 21:35:40,734 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) [2021-06-12 21:35:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 32064 transitions. [2021-06-12 21:35:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:40,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:40,744 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:40,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-12 21:35:40,945 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:40,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:40,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1270909581, now seen corresponding path program 118 times [2021-06-12 21:35:40,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:40,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859213305] [2021-06-12 21:35:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:40,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:35:41,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:41,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859213305] [2021-06-12 21:35:41,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859213305] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:41,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436711429] [2021-06-12 21:35:41,167 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 [2021-06-12 21:35:41,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:35:41,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:41,191 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:35:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:41,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,531 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,531 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:41,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,535 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:41,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:41,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:41,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:41,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:41,545 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 [2021-06-12 21:35:41,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:41,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:41,555 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:41,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-12 21:35:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:41,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436711429] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:41,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:41,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-12 21:35:41,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088847077] [2021-06-12 21:35:41,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:35:41,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:41,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:35:41,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:35:41,580 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) [2021-06-12 21:35:43,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:43,753 INFO L93 Difference]: Finished difference Result 16411 states and 41283 transitions. [2021-06-12 21:35:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:35:43,753 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 [2021-06-12 21:35:43,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:43,771 INFO L225 Difference]: With dead ends: 16411 [2021-06-12 21:35:43,771 INFO L226 Difference]: Without dead ends: 16378 [2021-06-12 21:35:43,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 951 ImplicationChecksByTransitivity, 1900.1ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-06-12 21:35:43,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16378 states. [2021-06-12 21:35:43,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16378 to 12565. [2021-06-12 21:35:43,931 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) [2021-06-12 21:35:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12565 states to 12565 states and 32316 transitions. [2021-06-12 21:35:43,952 INFO L78 Accepts]: Start accepts. Automaton has 12565 states and 32316 transitions. Word has length 34 [2021-06-12 21:35:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:43,952 INFO L482 AbstractCegarLoop]: Abstraction has 12565 states and 32316 transitions. [2021-06-12 21:35:43,952 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) [2021-06-12 21:35:43,952 INFO L276 IsEmpty]: Start isEmpty. Operand 12565 states and 32316 transitions. [2021-06-12 21:35:43,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:43,962 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:43,962 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:44,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable864,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:44,163 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:44,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash 954034479, now seen corresponding path program 119 times [2021-06-12 21:35:44,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:44,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197412976] [2021-06-12 21:35:44,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:44,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:44,392 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 21:35:44,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:44,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197412976] [2021-06-12 21:35:44,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197412976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:44,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202917665] [2021-06-12 21:35:44,393 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 [2021-06-12 21:35:44,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 21:35:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:44,418 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:35:44,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:44,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:44,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:44,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,749 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:44,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:44,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:44,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:44,751 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 [2021-06-12 21:35:44,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:44,756 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:44,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:44,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-12 21:35:44,776 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:44,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202917665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:44,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:44,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-12 21:35:44,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431144470] [2021-06-12 21:35:44,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:35:44,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:44,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:35:44,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:35:44,777 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) [2021-06-12 21:35:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:47,736 INFO L93 Difference]: Finished difference Result 16814 states and 42191 transitions. [2021-06-12 21:35:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-12 21:35:47,736 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 [2021-06-12 21:35:47,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:47,754 INFO L225 Difference]: With dead ends: 16814 [2021-06-12 21:35:47,754 INFO L226 Difference]: Without dead ends: 16795 [2021-06-12 21:35:47,755 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1538 ImplicationChecksByTransitivity, 2446.2ms TimeCoverageRelationStatistics Valid=709, Invalid=4841, Unknown=0, NotChecked=0, Total=5550 [2021-06-12 21:35:47,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16795 states. [2021-06-12 21:35:47,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16795 to 12569. [2021-06-12 21:35:47,907 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) [2021-06-12 21:35:47,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12569 states to 12569 states and 32332 transitions. [2021-06-12 21:35:47,926 INFO L78 Accepts]: Start accepts. Automaton has 12569 states and 32332 transitions. Word has length 34 [2021-06-12 21:35:47,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:47,926 INFO L482 AbstractCegarLoop]: Abstraction has 12569 states and 32332 transitions. [2021-06-12 21:35:47,926 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) [2021-06-12 21:35:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 12569 states and 32332 transitions. [2021-06-12 21:35:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:47,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:47,935 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:48,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:48,136 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:48,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:48,136 INFO L82 PathProgramCache]: Analyzing trace with hash -766181841, now seen corresponding path program 120 times [2021-06-12 21:35:48,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:48,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508964916] [2021-06-12 21:35:48,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:48,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 21:35:48,503 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:48,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508964916] [2021-06-12 21:35:48,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508964916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:48,503 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013283955] [2021-06-12 21:35:48,503 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 [2021-06-12 21:35:48,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 21:35:48,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:48,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:35:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:49,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:49,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:49,140 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:49,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:49,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:49,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:49,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:49,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:49,145 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:49,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:49,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:49,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:49,152 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:49,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:49,184 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 [2021-06-12 21:35:49,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-06-12 21:35:49,257 INFO L628 ElimStorePlain]: treesize reduction 220, result has 13.7 percent of original size [2021-06-12 21:35:49,261 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-12 21:35:49,261 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:16 [2021-06-12 21:35:49,315 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:49,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013283955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:49,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:49,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-06-12 21:35:49,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132792077] [2021-06-12 21:35:49,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:35:49,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:49,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:35:49,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:35:49,316 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) [2021-06-12 21:35:51,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:51,614 INFO L93 Difference]: Finished difference Result 15950 states and 40250 transitions. [2021-06-12 21:35:51,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 21:35:51,614 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 [2021-06-12 21:35:51,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:51,631 INFO L225 Difference]: With dead ends: 15950 [2021-06-12 21:35:51,631 INFO L226 Difference]: Without dead ends: 15904 [2021-06-12 21:35:51,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 2279.1ms TimeCoverageRelationStatistics Valid=615, Invalid=3675, Unknown=0, NotChecked=0, Total=4290 [2021-06-12 21:35:51,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15904 states. [2021-06-12 21:35:51,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15904 to 12573. [2021-06-12 21:35:51,785 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) [2021-06-12 21:35:51,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12573 states to 12573 states and 32318 transitions. [2021-06-12 21:35:51,805 INFO L78 Accepts]: Start accepts. Automaton has 12573 states and 32318 transitions. Word has length 34 [2021-06-12 21:35:51,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:51,805 INFO L482 AbstractCegarLoop]: Abstraction has 12573 states and 32318 transitions. [2021-06-12 21:35:51,806 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) [2021-06-12 21:35:51,806 INFO L276 IsEmpty]: Start isEmpty. Operand 12573 states and 32318 transitions. [2021-06-12 21:35:51,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:51,815 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:51,815 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:52,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable866 [2021-06-12 21:35:52,016 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:52,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:52,016 INFO L82 PathProgramCache]: Analyzing trace with hash -769209587, now seen corresponding path program 121 times [2021-06-12 21:35:52,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:52,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79514544] [2021-06-12 21:35:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:52,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:52,215 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:52,216 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:52,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79514544] [2021-06-12 21:35:52,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79514544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:52,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64051950] [2021-06-12 21:35:52,216 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 [2021-06-12 21:35:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:52,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:35:52,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:52,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,574 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:52,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:52,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:52,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:52,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:52,582 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:52,582 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 [2021-06-12 21:35:52,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:52,588 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:52,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:52,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-12 21:35:52,608 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:52,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64051950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:52,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:52,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-06-12 21:35:52,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938224897] [2021-06-12 21:35:52,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 21:35:52,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:52,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 21:35:52,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-06-12 21:35:52,609 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) [2021-06-12 21:35:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:54,795 INFO L93 Difference]: Finished difference Result 13633 states and 34575 transitions. [2021-06-12 21:35:54,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 21:35:54,795 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 [2021-06-12 21:35:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:54,813 INFO L225 Difference]: With dead ends: 13633 [2021-06-12 21:35:54,813 INFO L226 Difference]: Without dead ends: 13606 [2021-06-12 21:35:54,813 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 1941.1ms TimeCoverageRelationStatistics Valid=438, Invalid=3344, Unknown=0, NotChecked=0, Total=3782 [2021-06-12 21:35:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13606 states. [2021-06-12 21:35:54,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13606 to 12605. [2021-06-12 21:35:54,957 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) [2021-06-12 21:35:54,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12605 states to 12605 states and 32384 transitions. [2021-06-12 21:35:54,975 INFO L78 Accepts]: Start accepts. Automaton has 12605 states and 32384 transitions. Word has length 34 [2021-06-12 21:35:54,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:54,975 INFO L482 AbstractCegarLoop]: Abstraction has 12605 states and 32384 transitions. [2021-06-12 21:35:54,975 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) [2021-06-12 21:35:54,976 INFO L276 IsEmpty]: Start isEmpty. Operand 12605 states and 32384 transitions. [2021-06-12 21:35:54,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:54,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:54,984 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:55,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable878,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:55,186 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:55,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:55,186 INFO L82 PathProgramCache]: Analyzing trace with hash -915560657, now seen corresponding path program 122 times [2021-06-12 21:35:55,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:55,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167863517] [2021-06-12 21:35:55,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:55,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:55,471 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:55,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:55,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167863517] [2021-06-12 21:35:55,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167863517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:55,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413198079] [2021-06-12 21:35:55,472 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 [2021-06-12 21:35:55,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 21:35:55,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:55,496 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:35:55,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:55,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,858 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:55,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,862 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:55,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,863 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,864 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,864 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:55,865 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:55,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:55,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:55,866 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 [2021-06-12 21:35:55,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:35:55,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:55,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:55,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-12 21:35:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:35:55,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413198079] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:55,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:35:55,891 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-12 21:35:55,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678669398] [2021-06-12 21:35:55,891 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:35:55,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:35:55,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:35:55,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:35:55,891 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) [2021-06-12 21:35:57,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:35:57,881 INFO L93 Difference]: Finished difference Result 16746 states and 42145 transitions. [2021-06-12 21:35:57,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 21:35:57,882 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 [2021-06-12 21:35:57,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:35:57,899 INFO L225 Difference]: With dead ends: 16746 [2021-06-12 21:35:57,899 INFO L226 Difference]: Without dead ends: 16713 [2021-06-12 21:35:57,900 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 1956.8ms TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 21:35:57,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16713 states. [2021-06-12 21:35:58,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16713 to 12629. [2021-06-12 21:35:58,051 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) [2021-06-12 21:35:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32432 transitions. [2021-06-12 21:35:58,070 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32432 transitions. Word has length 34 [2021-06-12 21:35:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:35:58,070 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32432 transitions. [2021-06-12 21:35:58,070 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) [2021-06-12 21:35:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32432 transitions. [2021-06-12 21:35:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:35:58,080 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:35:58,080 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:35:58,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:35:58,285 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:35:58,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:35:58,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1309383403, now seen corresponding path program 123 times [2021-06-12 21:35:58,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:35:58,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888923581] [2021-06-12 21:35:58,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:35:58,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:35:58,544 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:35:58,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:35:58,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888923581] [2021-06-12 21:35:58,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888923581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:35:58,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115089304] [2021-06-12 21:35:58,544 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 [2021-06-12 21:35:58,569 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 21:35:58,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:35:58,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-12 21:35:58,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:35:59,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:35:59,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,040 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,043 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:35:59,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:59,141 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 [2021-06-12 21:35:59,753 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 165 [2021-06-12 21:35:59,920 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-12 21:35:59,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:35:59,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:35:59,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:122, output treesize:74 [2021-06-12 21:36:00,079 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:00,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115089304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:00,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:00,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-06-12 21:36:00,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137061653] [2021-06-12 21:36:00,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 21:36:00,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:00,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 21:36:00,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-06-12 21:36:00,081 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) [2021-06-12 21:36:04,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:04,549 INFO L93 Difference]: Finished difference Result 16941 states and 42462 transitions. [2021-06-12 21:36:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-12 21:36:04,549 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 [2021-06-12 21:36:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:04,570 INFO L225 Difference]: With dead ends: 16941 [2021-06-12 21:36:04,570 INFO L226 Difference]: Without dead ends: 16910 [2021-06-12 21:36:04,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3412 ImplicationChecksByTransitivity, 3884.0ms TimeCoverageRelationStatistics Valid=1133, Invalid=9373, Unknown=0, NotChecked=0, Total=10506 [2021-06-12 21:36:04,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16910 states. [2021-06-12 21:36:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16910 to 12629. [2021-06-12 21:36:04,784 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) [2021-06-12 21:36:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12629 states to 12629 states and 32440 transitions. [2021-06-12 21:36:04,803 INFO L78 Accepts]: Start accepts. Automaton has 12629 states and 32440 transitions. Word has length 34 [2021-06-12 21:36:04,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:04,803 INFO L482 AbstractCegarLoop]: Abstraction has 12629 states and 32440 transitions. [2021-06-12 21:36:04,803 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) [2021-06-12 21:36:04,803 INFO L276 IsEmpty]: Start isEmpty. Operand 12629 states and 32440 transitions. [2021-06-12 21:36:04,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:36:04,812 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:04,812 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:05,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:05,021 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:05,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:05,021 INFO L82 PathProgramCache]: Analyzing trace with hash 92531981, now seen corresponding path program 124 times [2021-06-12 21:36:05,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:05,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324693164] [2021-06-12 21:36:05,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 21:36:05,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:05,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324693164] [2021-06-12 21:36:05,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324693164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:05,273 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270963718] [2021-06-12 21:36:05,273 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 [2021-06-12 21:36:05,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 21:36:05,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:05,297 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:36:05,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:05,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,635 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:05,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,638 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:05,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,639 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:05,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:05,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:05,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:05,643 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 [2021-06-12 21:36:05,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:05,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:05,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:36:05,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-12 21:36:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:05,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270963718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:05,670 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:05,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-06-12 21:36:05,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153429715] [2021-06-12 21:36:05,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 21:36:05,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:05,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 21:36:05,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=571, Unknown=0, NotChecked=0, Total=650 [2021-06-12 21:36:05,671 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) [2021-06-12 21:36:07,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:07,940 INFO L93 Difference]: Finished difference Result 13890 states and 35182 transitions. [2021-06-12 21:36:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-12 21:36:07,941 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 [2021-06-12 21:36:07,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:07,956 INFO L225 Difference]: With dead ends: 13890 [2021-06-12 21:36:07,957 INFO L226 Difference]: Without dead ends: 13872 [2021-06-12 21:36:07,957 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 2093.2ms TimeCoverageRelationStatistics Valid=541, Invalid=3881, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 21:36:07,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13872 states. [2021-06-12 21:36:08,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13872 to 12614. [2021-06-12 21:36:08,101 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) [2021-06-12 21:36:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12614 states to 12614 states and 32401 transitions. [2021-06-12 21:36:08,121 INFO L78 Accepts]: Start accepts. Automaton has 12614 states and 32401 transitions. Word has length 34 [2021-06-12 21:36:08,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:08,121 INFO L482 AbstractCegarLoop]: Abstraction has 12614 states and 32401 transitions. [2021-06-12 21:36:08,121 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) [2021-06-12 21:36:08,121 INFO L276 IsEmpty]: Start isEmpty. Operand 12614 states and 32401 transitions. [2021-06-12 21:36:08,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:36:08,130 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:08,131 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:08,331 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:08,331 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:08,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:08,331 INFO L82 PathProgramCache]: Analyzing trace with hash -2032929557, now seen corresponding path program 125 times [2021-06-12 21:36:08,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:08,332 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599024520] [2021-06-12 21:36:08,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:08,552 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:08,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:08,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599024520] [2021-06-12 21:36:08,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599024520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:08,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561148530] [2021-06-12 21:36:08,552 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 [2021-06-12 21:36:08,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 21:36:08,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:08,584 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-06-12 21:36:08,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:08,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,924 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,926 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,927 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:08,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,931 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:08,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:08,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:08,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:08,937 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:08,938 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 [2021-06-12 21:36:08,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 21:36:08,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:08,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 21:36:08,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-06-12 21:36:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:08,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561148530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:08,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 21:36:08,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-12 21:36:08,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900433033] [2021-06-12 21:36:08,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-12 21:36:08,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 21:36:08,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-12 21:36:08,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2021-06-12 21:36:08,969 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) [2021-06-12 21:36:10,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 21:36:10,162 INFO L93 Difference]: Finished difference Result 13122 states and 33247 transitions. [2021-06-12 21:36:10,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-12 21:36:10,162 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 [2021-06-12 21:36:10,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 21:36:10,176 INFO L225 Difference]: With dead ends: 13122 [2021-06-12 21:36:10,176 INFO L226 Difference]: Without dead ends: 13095 [2021-06-12 21:36:10,177 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 1047.8ms TimeCoverageRelationStatistics Valid=335, Invalid=1921, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 21:36:10,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13095 states. [2021-06-12 21:36:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13095 to 12617. [2021-06-12 21:36:10,374 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) [2021-06-12 21:36:10,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12617 states to 12617 states and 32366 transitions. [2021-06-12 21:36:10,394 INFO L78 Accepts]: Start accepts. Automaton has 12617 states and 32366 transitions. Word has length 34 [2021-06-12 21:36:10,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 21:36:10,394 INFO L482 AbstractCegarLoop]: Abstraction has 12617 states and 32366 transitions. [2021-06-12 21:36:10,394 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) [2021-06-12 21:36:10,394 INFO L276 IsEmpty]: Start isEmpty. Operand 12617 states and 32366 transitions. [2021-06-12 21:36:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-12 21:36:10,403 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 21:36:10,403 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 21:36:10,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable939,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 21:36:10,603 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 21:36:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 21:36:10,604 INFO L82 PathProgramCache]: Analyzing trace with hash 192014503, now seen corresponding path program 126 times [2021-06-12 21:36:10,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 21:36:10,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534591269] [2021-06-12 21:36:10,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 21:36:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 21:36:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 21:36:10,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 21:36:10,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534591269] [2021-06-12 21:36:10,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534591269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 21:36:10,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390671493] [2021-06-12 21:36:10,845 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 [2021-06-12 21:36:10,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 21:36:10,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 21:36:10,873 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-06-12 21:36:10,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 21:36:11,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:11,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:11,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:11,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:11,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:11,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:11,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:11,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:11,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-12 21:36:11,442 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 21:36:11,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 21:36:11,539 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 [2021-06-12 21:36:13,066 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 442 DAG size of output: 403 [2021-06-12 21:36:13,514 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-06-12 21:36:13,962 WARN L205 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 544 DAG size of output: 495 [2021-06-12 21:36:14,456 WARN L205 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 547 DAG size of output: 498 [2021-06-12 21:36:14,904 WARN L205 SmtUtils]: Spent 412.00 ms on a formula simplification. DAG size of input: 409 DAG size of output: 528 [2021-06-12 21:36:15,774 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 223 [2021-06-12 21:36:16,375 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 579 [2021-06-12 21:36:16,888 WARN L205 SmtUtils]: Spent 409.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 712 [2021-06-12 21:36:17,696 WARN L205 SmtUtils]: Spent 804.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 898 [2021-06-12 21:36:18,247 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 260 DAG size of output: 218 [2021-06-12 21:36:18,474 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 280 DAG size of output: 235 [2021-06-12 21:36:19,025 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 198 DAG size of output: 184 [2021-06-12 21:36:19,211 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 217 DAG size of output: 200 [2021-06-12 21:36:19,556 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 427 DAG size of output: 366 [2021-06-12 21:36:20,953 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-06-12 21:36:22,368 WARN L205 SmtUtils]: Spent 1.41 s on a formula simplification. DAG size of input: 1237 DAG size of output: 1143 [2021-06-12 21:36:23,811 WARN L205 SmtUtils]: Spent 1.44 s on a formula simplification. DAG size of input: 1240 DAG size of output: 1146 [2021-06-12 21:36:25,684 WARN L205 SmtUtils]: Spent 1.87 s on a formula simplification. DAG size of input: 1148 DAG size of output: 1682 [2021-06-12 21:36:27,076 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 321 DAG size of output: 446 [2021-06-12 21:36:30,462 WARN L205 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 440 DAG size of output: 330 [2021-06-12 21:42:52,732 WARN L205 SmtUtils]: Spent 6.37 m on a formula simplification. DAG size of input: 2100 DAG size of output: 1622 [2021-06-12 21:43:44,407 WARN L205 SmtUtils]: Spent 51.67 s on a formula simplification. DAG size of input: 2100 DAG size of output: 1623 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown