/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/heavy-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 11:39:03,380 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 11:39:03,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 11:39:03,415 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 11:39:03,458 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 11:39:03,479 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 11:39:03,479 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 11:39:03,479 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 11:39:03,479 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 11:39:03,480 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 11:39:03,480 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 11:39:03,480 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 11:39:03,480 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 11:39:03,480 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 11:39:03,480 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 11:39:03,480 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 11:39:03,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 11:39:03,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 11:39:03,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 11:39:03,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 11:39:03,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 11:39:03,482 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 11:39:03,482 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 11:39:03,482 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 11:39:03,482 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 11:39:03,482 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 11:39:03,482 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 11:39:03,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 11:39:03,482 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 11:39:03,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 11:39:03,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 11:39:03,702 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 11:39:03,702 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 11:39:03,703 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 11:39:03,703 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/heavy-1.c [2022-03-18 11:39:03,767 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ff73d69c/9723da77b7534d0ebc9158894835f06a/FLAGa61eb75e4 [2022-03-18 11:39:04,211 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 11:39:04,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c [2022-03-18 11:39:04,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ff73d69c/9723da77b7534d0ebc9158894835f06a/FLAGa61eb75e4 [2022-03-18 11:39:04,670 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ff73d69c/9723da77b7534d0ebc9158894835f06a [2022-03-18 11:39:04,671 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 11:39:04,673 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 11:39:04,674 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 11:39:04,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 11:39:04,676 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 11:39:04,677 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:39:04" (1/1) ... [2022-03-18 11:39:04,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@621a6c1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04, skipping insertion in model container [2022-03-18 11:39:04,681 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 11:39:04" (1/1) ... [2022-03-18 11:39:04,685 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 11:39:04,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 11:39:04,814 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c[600,613] [2022-03-18 11:39:04,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 11:39:04,844 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 11:39:04,855 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/heavy-1.c[600,613] [2022-03-18 11:39:04,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 11:39:04,884 INFO L208 MainTranslator]: Completed translation [2022-03-18 11:39:04,885 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04 WrapperNode [2022-03-18 11:39:04,885 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 11:39:04,885 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 11:39:04,886 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 11:39:04,886 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 11:39:04,894 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04" (1/1) ... [2022-03-18 11:39:04,894 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04" (1/1) ... [2022-03-18 11:39:04,898 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04" (1/1) ... [2022-03-18 11:39:04,898 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04" (1/1) ... [2022-03-18 11:39:04,907 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04" (1/1) ... [2022-03-18 11:39:04,909 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04" (1/1) ... [2022-03-18 11:39:04,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04" (1/1) ... [2022-03-18 11:39:04,911 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 11:39:04,912 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 11:39:04,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 11:39:04,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 11:39:04,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04" (1/1) ... [2022-03-18 11:39:04,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 11:39:04,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:04,939 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 11:39:04,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 11:39:04,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 11:39:04,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 11:39:04,981 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 11:39:04,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 11:39:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 11:39:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 11:39:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 11:39:04,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 11:39:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 11:39:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 11:39:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 11:39:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 11:39:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 11:39:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2022-03-18 11:39:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 11:39:04,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 11:39:05,032 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 11:39:05,033 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 11:39:05,136 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 11:39:05,144 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 11:39:05,144 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-03-18 11:39:05,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:39:05 BoogieIcfgContainer [2022-03-18 11:39:05,145 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 11:39:05,147 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 11:39:05,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 11:39:05,149 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 11:39:05,149 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 11:39:04" (1/3) ... [2022-03-18 11:39:05,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6cc49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:39:05, skipping insertion in model container [2022-03-18 11:39:05,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 11:39:04" (2/3) ... [2022-03-18 11:39:05,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f6cc49b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 11:39:05, skipping insertion in model container [2022-03-18 11:39:05,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 11:39:05" (3/3) ... [2022-03-18 11:39:05,151 INFO L111 eAbstractionObserver]: Analyzing ICFG heavy-1.c [2022-03-18 11:39:05,154 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 11:39:05,154 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 11:39:05,182 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 11:39:05,187 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 11:39:05,187 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 11:39:05,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 11:39:05,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-18 11:39:05,200 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:05,200 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:05,200 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:05,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:05,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1947864061, now seen corresponding path program 1 times [2022-03-18 11:39:05,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:05,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377843445] [2022-03-18 11:39:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:05,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:05,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:05,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:39:05,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:05,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377843445] [2022-03-18 11:39:05,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377843445] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:39:05,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:39:05,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 11:39:05,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701685829] [2022-03-18 11:39:05,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:39:05,405 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 11:39:05,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:05,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 11:39:05,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 11:39:05,452 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:05,530 INFO L93 Difference]: Finished difference Result 42 states and 61 transitions. [2022-03-18 11:39:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 11:39:05,532 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-18 11:39:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:05,536 INFO L225 Difference]: With dead ends: 42 [2022-03-18 11:39:05,536 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 11:39:05,538 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 11:39:05,546 INFO L912 BasicCegarLoop]: 18 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:05,547 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 11:39:05,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 11:39:05,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 15. [2022-03-18 11:39:05,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-03-18 11:39:05,566 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-03-18 11:39:05,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:05,567 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-03-18 11:39:05,570 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,570 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-03-18 11:39:05,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-18 11:39:05,571 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:05,571 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:05,572 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 11:39:05,572 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:05,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:05,575 INFO L85 PathProgramCache]: Analyzing trace with hash 1947835231, now seen corresponding path program 1 times [2022-03-18 11:39:05,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:05,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368371532] [2022-03-18 11:39:05,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:05,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:05,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:39:05,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:05,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368371532] [2022-03-18 11:39:05,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368371532] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:39:05,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:39:05,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 11:39:05,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942603321] [2022-03-18 11:39:05,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:39:05,674 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 11:39:05,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:05,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 11:39:05,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 11:39:05,675 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:05,749 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2022-03-18 11:39:05,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 11:39:05,750 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-18 11:39:05,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:05,751 INFO L225 Difference]: With dead ends: 36 [2022-03-18 11:39:05,751 INFO L226 Difference]: Without dead ends: 33 [2022-03-18 11:39:05,751 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 11:39:05,752 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:05,752 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 20 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 11:39:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-18 11:39:05,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 16. [2022-03-18 11:39:05,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-03-18 11:39:05,756 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 9 [2022-03-18 11:39:05,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:05,756 INFO L478 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-03-18 11:39:05,757 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-03-18 11:39:05,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 11:39:05,757 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:05,757 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:05,757 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 11:39:05,758 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:05,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:05,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1310776898, now seen corresponding path program 1 times [2022-03-18 11:39:05,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:05,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644537039] [2022-03-18 11:39:05,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:05,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:05,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:05,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:05,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:05,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:39:05,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:05,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644537039] [2022-03-18 11:39:05,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644537039] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:39:05,812 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:39:05,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 11:39:05,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849053085] [2022-03-18 11:39:05,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:39:05,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 11:39:05,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:05,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 11:39:05,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 11:39:05,815 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:05,880 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-03-18 11:39:05,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 11:39:05,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 11:39:05,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:05,884 INFO L225 Difference]: With dead ends: 40 [2022-03-18 11:39:05,884 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 11:39:05,885 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 11:39:05,886 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:05,887 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 20 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:39:05,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 11:39:05,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 17. [2022-03-18 11:39:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-03-18 11:39:05,890 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-03-18 11:39:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:05,890 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-03-18 11:39:05,890 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,891 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-03-18 11:39:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 11:39:05,891 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:05,891 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:05,891 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 11:39:05,891 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:05,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1718535333, now seen corresponding path program 1 times [2022-03-18 11:39:05,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:05,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681013746] [2022-03-18 11:39:05,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:05,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:05,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:05,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:39:05,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:05,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681013746] [2022-03-18 11:39:05,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681013746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 11:39:05,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 11:39:05,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 11:39:05,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387175059] [2022-03-18 11:39:05,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 11:39:05,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 11:39:05,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:05,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 11:39:05,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 11:39:05,934 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:05,976 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-03-18 11:39:05,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 11:39:05,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 11:39:05,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:05,977 INFO L225 Difference]: With dead ends: 31 [2022-03-18 11:39:05,977 INFO L226 Difference]: Without dead ends: 21 [2022-03-18 11:39:05,980 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 11:39:05,984 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 4 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:05,984 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 26 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 11:39:05,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-18 11:39:05,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-03-18 11:39:05,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2022-03-18 11:39:05,988 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2022-03-18 11:39:05,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:05,988 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2022-03-18 11:39:05,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:05,988 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2022-03-18 11:39:05,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 11:39:05,993 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:05,994 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:05,994 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 11:39:05,994 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:05,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:05,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1543508103, now seen corresponding path program 1 times [2022-03-18 11:39:05,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:05,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411093012] [2022-03-18 11:39:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:05,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:06,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:06,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:06,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 11:39:06,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:06,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411093012] [2022-03-18 11:39:06,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411093012] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:06,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783561562] [2022-03-18 11:39:06,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:06,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:06,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:06,132 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:39:06,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 11:39:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:06,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 11:39:06,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:39:06,237 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 11:39:06,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:39:06,284 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-18 11:39:06,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783561562] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:39:06,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:39:06,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-18 11:39:06,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859711840] [2022-03-18 11:39:06,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:39:06,285 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 11:39:06,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:06,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 11:39:06,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-18 11:39:06,286 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:06,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:06,491 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2022-03-18 11:39:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 11:39:06,492 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-03-18 11:39:06,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:06,499 INFO L225 Difference]: With dead ends: 58 [2022-03-18 11:39:06,499 INFO L226 Difference]: Without dead ends: 47 [2022-03-18 11:39:06,501 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2022-03-18 11:39:06,502 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:06,502 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 43 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 11:39:06,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-18 11:39:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2022-03-18 11:39:06,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:06,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2022-03-18 11:39:06,523 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 17 [2022-03-18 11:39:06,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:06,524 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2022-03-18 11:39:06,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:06,524 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2022-03-18 11:39:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-18 11:39:06,524 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:06,524 INFO L500 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:06,560 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 11:39:06,725 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:06,725 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:06,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1716187778, now seen corresponding path program 2 times [2022-03-18 11:39:06,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:06,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932450042] [2022-03-18 11:39:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:06,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:06,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:06,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:06,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:06,959 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-18 11:39:06,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:06,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932450042] [2022-03-18 11:39:06,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932450042] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:06,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465984677] [2022-03-18 11:39:06,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 11:39:06,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:06,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:06,976 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:39:06,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 11:39:07,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 11:39:07,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:39:07,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-18 11:39:07,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:39:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 44 proven. 4 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-03-18 11:39:07,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:39:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 65 proven. 19 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-03-18 11:39:07,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465984677] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:39:07,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:39:07,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 16 [2022-03-18 11:39:07,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997696748] [2022-03-18 11:39:07,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:39:07,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 11:39:07,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:07,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 11:39:07,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-03-18 11:39:07,290 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:07,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:07,697 INFO L93 Difference]: Finished difference Result 140 states and 172 transitions. [2022-03-18 11:39:07,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 11:39:07,698 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), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-03-18 11:39:07,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:07,699 INFO L225 Difference]: With dead ends: 140 [2022-03-18 11:39:07,699 INFO L226 Difference]: Without dead ends: 94 [2022-03-18 11:39:07,699 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-03-18 11:39:07,700 INFO L912 BasicCegarLoop]: 13 mSDtfsCounter, 49 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:07,700 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 90 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 11:39:07,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-18 11:39:07,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 86. [2022-03-18 11:39:07,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.170731707317073) internal successors, (96), 82 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:07,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 99 transitions. [2022-03-18 11:39:07,709 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 99 transitions. Word has length 40 [2022-03-18 11:39:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:07,709 INFO L478 AbstractCegarLoop]: Abstraction has 86 states and 99 transitions. [2022-03-18 11:39:07,709 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:07,709 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 99 transitions. [2022-03-18 11:39:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-18 11:39:07,710 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:07,710 INFO L500 BasicCegarLoop]: trace histogram [18, 18, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:07,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 11:39:07,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-03-18 11:39:07,948 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:07,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:07,949 INFO L85 PathProgramCache]: Analyzing trace with hash 91775870, now seen corresponding path program 3 times [2022-03-18 11:39:07,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:07,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947956881] [2022-03-18 11:39:07,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:07,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:07,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:08,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:08,084 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 182 proven. 36 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2022-03-18 11:39:08,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:08,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947956881] [2022-03-18 11:39:08,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947956881] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:08,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595108038] [2022-03-18 11:39:08,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 11:39:08,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:08,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:08,105 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:39:08,141 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 11:39:08,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 11:39:08,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:39:08,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 11:39:08,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:39:08,272 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 11:39:08,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:39:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-03-18 11:39:08,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595108038] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:39:08,393 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:39:08,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4, 4] total 14 [2022-03-18 11:39:08,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9302390] [2022-03-18 11:39:08,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:39:08,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 11:39:08,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:08,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 11:39:08,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-18 11:39:08,394 INFO L87 Difference]: Start difference. First operand 86 states and 99 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:08,846 INFO L93 Difference]: Finished difference Result 389 states and 465 transitions. [2022-03-18 11:39:08,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 11:39:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-03-18 11:39:08,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:08,849 INFO L225 Difference]: With dead ends: 389 [2022-03-18 11:39:08,849 INFO L226 Difference]: Without dead ends: 310 [2022-03-18 11:39:08,850 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=345, Invalid=1635, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 11:39:08,850 INFO L912 BasicCegarLoop]: 16 mSDtfsCounter, 86 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:08,851 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 69 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 11:39:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-03-18 11:39:08,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 294. [2022-03-18 11:39:08,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 290 states have (on average 1.0724137931034483) internal successors, (311), 290 states have internal predecessors, (311), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:08,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 314 transitions. [2022-03-18 11:39:08,920 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 314 transitions. Word has length 60 [2022-03-18 11:39:08,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:08,920 INFO L478 AbstractCegarLoop]: Abstraction has 294 states and 314 transitions. [2022-03-18 11:39:08,921 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:08,921 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 314 transitions. [2022-03-18 11:39:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-03-18 11:39:08,946 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:08,947 INFO L500 BasicCegarLoop]: trace histogram [112, 112, 16, 16, 16, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:08,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 11:39:09,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:09,164 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:09,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:09,165 INFO L85 PathProgramCache]: Analyzing trace with hash 977727903, now seen corresponding path program 4 times [2022-03-18 11:39:09,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:09,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322903537] [2022-03-18 11:39:09,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:09,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:09,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:10,000 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 1718 proven. 49 refuted. 0 times theorem prover too weak. 12903 trivial. 0 not checked. [2022-03-18 11:39:10,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:10,000 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322903537] [2022-03-18 11:39:10,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322903537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:10,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749623654] [2022-03-18 11:39:10,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 11:39:10,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:10,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:10,002 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:39:10,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 11:39:10,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 11:39:10,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:39:10,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-18 11:39:10,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:39:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 5551 proven. 694 refuted. 0 times theorem prover too weak. 8425 trivial. 0 not checked. [2022-03-18 11:39:10,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:39:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 14670 backedges. 5374 proven. 1662 refuted. 0 times theorem prover too weak. 7634 trivial. 0 not checked. [2022-03-18 11:39:11,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749623654] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:39:11,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:39:11,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 12] total 26 [2022-03-18 11:39:11,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719911196] [2022-03-18 11:39:11,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:39:11,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 11:39:11,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:11,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 11:39:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2022-03-18 11:39:11,142 INFO L87 Difference]: Start difference. First operand 294 states and 314 transitions. Second operand has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:16,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:16,678 INFO L93 Difference]: Finished difference Result 1093 states and 1220 transitions. [2022-03-18 11:39:16,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-03-18 11:39:16,678 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 293 [2022-03-18 11:39:16,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:16,683 INFO L225 Difference]: With dead ends: 1093 [2022-03-18 11:39:16,683 INFO L226 Difference]: Without dead ends: 822 [2022-03-18 11:39:16,690 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 694 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4763 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1815, Invalid=12947, Unknown=0, NotChecked=0, Total=14762 [2022-03-18 11:39:16,690 INFO L912 BasicCegarLoop]: 17 mSDtfsCounter, 198 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 1532 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 1729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 1532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:16,691 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 157 Invalid, 1729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 1532 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 11:39:16,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2022-03-18 11:39:16,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 782. [2022-03-18 11:39:16,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 778 states have (on average 1.057840616966581) internal successors, (823), 778 states have internal predecessors, (823), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 826 transitions. [2022-03-18 11:39:16,735 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 826 transitions. Word has length 293 [2022-03-18 11:39:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:16,735 INFO L478 AbstractCegarLoop]: Abstraction has 782 states and 826 transitions. [2022-03-18 11:39:16,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.3076923076923075) internal successors, (86), 25 states have internal predecessors, (86), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:16,735 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 826 transitions. [2022-03-18 11:39:16,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 782 [2022-03-18 11:39:16,744 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:16,745 INFO L500 BasicCegarLoop]: trace histogram [320, 320, 40, 40, 40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:16,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 11:39:16,964 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:16,964 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:16,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:16,965 INFO L85 PathProgramCache]: Analyzing trace with hash 547037983, now seen corresponding path program 5 times [2022-03-18 11:39:16,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:16,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651571350] [2022-03-18 11:39:16,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:16,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:18,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:18,291 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 5702 proven. 64 refuted. 0 times theorem prover too weak. 111636 trivial. 0 not checked. [2022-03-18 11:39:18,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:18,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651571350] [2022-03-18 11:39:18,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651571350] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:18,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907346927] [2022-03-18 11:39:18,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 11:39:18,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:18,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:18,308 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:39:18,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 11:39:19,382 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-03-18 11:39:19,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 11:39:19,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-18 11:39:19,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 11:39:20,340 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 55460 proven. 64 refuted. 0 times theorem prover too weak. 61878 trivial. 0 not checked. [2022-03-18 11:39:20,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 11:39:21,172 INFO L134 CoverageAnalysis]: Checked inductivity of 117402 backedges. 55460 proven. 64 refuted. 0 times theorem prover too weak. 61878 trivial. 0 not checked. [2022-03-18 11:39:21,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907346927] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 11:39:21,172 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 11:39:21,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-03-18 11:39:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465319671] [2022-03-18 11:39:21,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 11:39:21,174 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 11:39:21,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 11:39:21,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 11:39:21,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2022-03-18 11:39:21,175 INFO L87 Difference]: Start difference. First operand 782 states and 826 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:22,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 11:39:22,794 INFO L93 Difference]: Finished difference Result 2339 states and 2826 transitions. [2022-03-18 11:39:22,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 11:39:22,794 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 781 [2022-03-18 11:39:22,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 11:39:22,798 INFO L225 Difference]: With dead ends: 2339 [2022-03-18 11:39:22,798 INFO L226 Difference]: Without dead ends: 1582 [2022-03-18 11:39:22,799 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 1583 GetRequests, 1553 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=330, Invalid=600, Unknown=0, NotChecked=0, Total=930 [2022-03-18 11:39:22,799 INFO L912 BasicCegarLoop]: 14 mSDtfsCounter, 28 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 11:39:22,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 126 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 11:39:22,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2022-03-18 11:39:22,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1582. [2022-03-18 11:39:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1582 states, 1578 states have (on average 1.0285171102661597) internal successors, (1623), 1578 states have internal predecessors, (1623), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:22,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1582 states to 1582 states and 1626 transitions. [2022-03-18 11:39:22,857 INFO L78 Accepts]: Start accepts. Automaton has 1582 states and 1626 transitions. Word has length 781 [2022-03-18 11:39:22,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 11:39:22,857 INFO L478 AbstractCegarLoop]: Abstraction has 1582 states and 1626 transitions. [2022-03-18 11:39:22,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 11:39:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1582 states and 1626 transitions. [2022-03-18 11:39:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1582 [2022-03-18 11:39:22,905 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 11:39:22,906 INFO L500 BasicCegarLoop]: trace histogram [720, 720, 40, 40, 40, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 11:39:22,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-18 11:39:23,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:23,111 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 11:39:23,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 11:39:23,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1321479905, now seen corresponding path program 6 times [2022-03-18 11:39:23,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 11:39:23,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807828833] [2022-03-18 11:39:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 11:39:23,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 11:39:25,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 11:39:26,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 11:39:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 549002 backedges. 26762 proven. 324 refuted. 0 times theorem prover too weak. 521916 trivial. 0 not checked. [2022-03-18 11:39:26,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 11:39:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807828833] [2022-03-18 11:39:26,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807828833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 11:39:26,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811536500] [2022-03-18 11:39:26,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 11:39:26,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 11:39:26,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 11:39:26,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 11:39:26,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process