/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/locks/test_locks_14-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 07:28:49,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 07:28:49,728 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 07:28:49,754 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 07:28:49,795 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-20 07:28:49,801 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 07:28:49,801 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 07:28:49,802 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 07:28:49,802 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 07:28:49,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 07:28:49,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 07:28:49,803 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 07:28:49,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 07:28:49,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 07:28:49,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 07:28:49,803 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 07:28:49,804 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 07:28:49,804 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 07:28:49,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 07:28:49,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 07:28:49,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 07:28:49,804 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 07:28:49,804 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 07:28:49,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 07:28:49,804 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 07:28:49,804 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 07:28:49,805 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-20 07:28:49,805 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 07:28:50,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 07:28:50,027 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 07:28:50,029 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 07:28:50,030 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 07:28:50,031 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 07:28:50,032 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_14-1.c [2022-03-20 07:28:50,085 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/832fd32d3/9cdb4e307f1a4ede9fd01f496096d44e/FLAG49998c75e [2022-03-20 07:28:50,443 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 07:28:50,443 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c [2022-03-20 07:28:50,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/832fd32d3/9cdb4e307f1a4ede9fd01f496096d44e/FLAG49998c75e [2022-03-20 07:28:50,467 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/832fd32d3/9cdb4e307f1a4ede9fd01f496096d44e [2022-03-20 07:28:50,469 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 07:28:50,470 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-20 07:28:50,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 07:28:50,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 07:28:50,474 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 07:28:50,475 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:28:50" (1/1) ... [2022-03-20 07:28:50,476 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b049fe3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50, skipping insertion in model container [2022-03-20 07:28:50,476 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 07:28:50" (1/1) ... [2022-03-20 07:28:50,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 07:28:50,506 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 07:28:50,662 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c[5283,5296] [2022-03-20 07:28:50,665 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 07:28:50,670 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 07:28:50,686 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_14-1.c[5283,5296] [2022-03-20 07:28:50,687 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 07:28:50,695 INFO L208 MainTranslator]: Completed translation [2022-03-20 07:28:50,696 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50 WrapperNode [2022-03-20 07:28:50,696 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 07:28:50,697 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 07:28:50,697 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 07:28:50,697 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 07:28:50,704 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50" (1/1) ... [2022-03-20 07:28:50,704 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50" (1/1) ... [2022-03-20 07:28:50,709 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50" (1/1) ... [2022-03-20 07:28:50,709 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50" (1/1) ... [2022-03-20 07:28:50,713 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50" (1/1) ... [2022-03-20 07:28:50,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50" (1/1) ... [2022-03-20 07:28:50,718 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50" (1/1) ... [2022-03-20 07:28:50,720 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 07:28:50,720 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 07:28:50,720 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 07:28:50,720 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 07:28:50,721 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50" (1/1) ... [2022-03-20 07:28:50,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 07:28:50,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 07:28:50,750 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) [2022-03-20 07:28:50,768 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 [2022-03-20 07:28:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 07:28:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 07:28:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 07:28:50,781 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 07:28:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 07:28:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 07:28:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 07:28:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 07:28:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 07:28:50,782 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 07:28:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 07:28:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 07:28:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 07:28:50,783 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 07:28:50,784 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 07:28:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 07:28:50,874 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 07:28:50,875 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 07:28:51,122 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 07:28:51,127 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 07:28:51,127 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 07:28:51,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:28:51 BoogieIcfgContainer [2022-03-20 07:28:51,129 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 07:28:51,129 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-20 07:28:51,130 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-20 07:28:51,132 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-20 07:28:51,135 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:28:51" (1/1) ... [2022-03-20 07:28:51,137 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-03-20 07:28:51,161 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 07:28:51 BasicIcfg [2022-03-20 07:28:51,162 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-20 07:28:51,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 07:28:51,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 07:28:51,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 07:28:51,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 07:28:50" (1/4) ... [2022-03-20 07:28:51,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d96b154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:28:51, skipping insertion in model container [2022-03-20 07:28:51,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 07:28:50" (2/4) ... [2022-03-20 07:28:51,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d96b154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 07:28:51, skipping insertion in model container [2022-03-20 07:28:51,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 07:28:51" (3/4) ... [2022-03-20 07:28:51,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d96b154 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:28:51, skipping insertion in model container [2022-03-20 07:28:51,170 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 20.03 07:28:51" (4/4) ... [2022-03-20 07:28:51,170 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_14-1.cJordan [2022-03-20 07:28:51,175 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-20 07:28:51,175 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 07:28:51,218 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 07:28:51,225 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-03-20 07:28:51,225 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 07:28:51,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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) [2022-03-20 07:28:51,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 07:28:51,251 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:51,251 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:51,252 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:51,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:51,256 INFO L85 PathProgramCache]: Analyzing trace with hash 267710119, now seen corresponding path program 1 times [2022-03-20 07:28:51,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:51,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587862830] [2022-03-20 07:28:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:51,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:51,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:51,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:51,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:51,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:51,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587862830] [2022-03-20 07:28:51,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587862830] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:51,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:51,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:51,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273948317] [2022-03-20 07:28:51,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:51,452 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:51,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:51,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:51,472 INFO L87 Difference]: Start difference. First operand has 57 states, 51 states have (on average 1.9019607843137254) internal successors, (97), 52 states have internal predecessors, (97), 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 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 07:28:51,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:51,662 INFO L93 Difference]: Finished difference Result 105 states and 186 transitions. [2022-03-20 07:28:51,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:51,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-03-20 07:28:51,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:51,671 INFO L225 Difference]: With dead ends: 105 [2022-03-20 07:28:51,672 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 07:28:51,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:51,675 INFO L913 BasicCegarLoop]: 104 mSDtfsCounter, 242 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:51,676 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 113 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:51,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 07:28:51,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-03-20 07:28:51,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 63 states have (on average 1.8888888888888888) internal successors, (119), 63 states have internal predecessors, (119), 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) [2022-03-20 07:28:51,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 122 transitions. [2022-03-20 07:28:51,705 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 122 transitions. Word has length 25 [2022-03-20 07:28:51,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:51,706 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 122 transitions. [2022-03-20 07:28:51,706 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 07:28:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 122 transitions. [2022-03-20 07:28:51,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-03-20 07:28:51,707 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:51,707 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:51,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 07:28:51,707 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:51,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1621019816, now seen corresponding path program 1 times [2022-03-20 07:28:51,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:51,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014103702] [2022-03-20 07:28:51,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:51,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:51,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:51,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:51,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:51,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014103702] [2022-03-20 07:28:51,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014103702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:51,780 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:51,780 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:51,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545505834] [2022-03-20 07:28:51,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:51,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:51,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:51,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:51,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:51,782 INFO L87 Difference]: Start difference. First operand 67 states and 122 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 07:28:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:51,878 INFO L93 Difference]: Finished difference Result 97 states and 175 transitions. [2022-03-20 07:28:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:51,879 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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 25 [2022-03-20 07:28:51,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:51,880 INFO L225 Difference]: With dead ends: 97 [2022-03-20 07:28:51,880 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 07:28:51,880 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:51,881 INFO L913 BasicCegarLoop]: 120 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:51,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 127 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:51,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 07:28:51,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2022-03-20 07:28:51,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 91 states have (on average 1.879120879120879) internal successors, (171), 91 states have internal predecessors, (171), 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) [2022-03-20 07:28:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 174 transitions. [2022-03-20 07:28:51,898 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 174 transitions. Word has length 25 [2022-03-20 07:28:51,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:51,899 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 174 transitions. [2022-03-20 07:28:51,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 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) [2022-03-20 07:28:51,899 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 174 transitions. [2022-03-20 07:28:51,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 07:28:51,900 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:51,900 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:51,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 07:28:51,900 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:51,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:51,901 INFO L85 PathProgramCache]: Analyzing trace with hash -290888810, now seen corresponding path program 1 times [2022-03-20 07:28:51,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:51,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697260223] [2022-03-20 07:28:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:51,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:51,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:51,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:51,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:51,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:51,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697260223] [2022-03-20 07:28:51,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697260223] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:51,978 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:51,978 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:51,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239883511] [2022-03-20 07:28:51,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:51,978 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:51,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:51,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:51,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:51,979 INFO L87 Difference]: Start difference. First operand 95 states and 174 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-03-20 07:28:52,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:52,102 INFO L93 Difference]: Finished difference Result 100 states and 177 transitions. [2022-03-20 07:28:52,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:52,102 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2022-03-20 07:28:52,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:52,105 INFO L225 Difference]: With dead ends: 100 [2022-03-20 07:28:52,105 INFO L226 Difference]: Without dead ends: 100 [2022-03-20 07:28:52,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:52,111 INFO L913 BasicCegarLoop]: 146 mSDtfsCounter, 183 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:52,113 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 153 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:52,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-20 07:28:52,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 98. [2022-03-20 07:28:52,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.8404255319148937) internal successors, (173), 94 states have internal predecessors, (173), 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) [2022-03-20 07:28:52,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 176 transitions. [2022-03-20 07:28:52,124 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 176 transitions. Word has length 26 [2022-03-20 07:28:52,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:52,125 INFO L478 AbstractCegarLoop]: Abstraction has 98 states and 176 transitions. [2022-03-20 07:28:52,125 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-03-20 07:28:52,125 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 176 transitions. [2022-03-20 07:28:52,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 07:28:52,125 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:52,125 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:52,125 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 07:28:52,126 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:52,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:52,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1287961163, now seen corresponding path program 1 times [2022-03-20 07:28:52,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:52,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353777221] [2022-03-20 07:28:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:52,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:52,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:52,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353777221] [2022-03-20 07:28:52,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353777221] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:52,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:52,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:52,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91268313] [2022-03-20 07:28:52,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:52,165 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:52,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:52,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:52,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:52,165 INFO L87 Difference]: Start difference. First operand 98 states and 176 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-03-20 07:28:52,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:52,242 INFO L93 Difference]: Finished difference Result 183 states and 334 transitions. [2022-03-20 07:28:52,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:52,242 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2022-03-20 07:28:52,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:52,244 INFO L225 Difference]: With dead ends: 183 [2022-03-20 07:28:52,244 INFO L226 Difference]: Without dead ends: 183 [2022-03-20 07:28:52,244 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:52,252 INFO L913 BasicCegarLoop]: 94 mSDtfsCounter, 229 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:52,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 101 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:52,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-20 07:28:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 129. [2022-03-20 07:28:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 125 states have (on average 1.84) internal successors, (230), 125 states have internal predecessors, (230), 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) [2022-03-20 07:28:52,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 233 transitions. [2022-03-20 07:28:52,263 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 233 transitions. Word has length 26 [2022-03-20 07:28:52,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:52,263 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 233 transitions. [2022-03-20 07:28:52,264 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-03-20 07:28:52,264 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 233 transitions. [2022-03-20 07:28:52,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 07:28:52,264 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:52,264 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:52,265 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 07:28:52,265 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:52,265 INFO L85 PathProgramCache]: Analyzing trace with hash 65348534, now seen corresponding path program 1 times [2022-03-20 07:28:52,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:52,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359792029] [2022-03-20 07:28:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:52,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:52,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:52,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359792029] [2022-03-20 07:28:52,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359792029] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:52,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:52,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:52,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175968182] [2022-03-20 07:28:52,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:52,297 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:52,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:52,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:52,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:52,298 INFO L87 Difference]: Start difference. First operand 129 states and 233 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-03-20 07:28:52,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:52,370 INFO L93 Difference]: Finished difference Result 185 states and 332 transitions. [2022-03-20 07:28:52,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:52,371 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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 26 [2022-03-20 07:28:52,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:52,372 INFO L225 Difference]: With dead ends: 185 [2022-03-20 07:28:52,372 INFO L226 Difference]: Without dead ends: 185 [2022-03-20 07:28:52,372 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:52,372 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 202 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:52,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 129 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:52,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-03-20 07:28:52,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 183. [2022-03-20 07:28:52,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 179 states have (on average 1.8324022346368716) internal successors, (328), 179 states have internal predecessors, (328), 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) [2022-03-20 07:28:52,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 331 transitions. [2022-03-20 07:28:52,393 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 331 transitions. Word has length 26 [2022-03-20 07:28:52,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:52,393 INFO L478 AbstractCegarLoop]: Abstraction has 183 states and 331 transitions. [2022-03-20 07:28:52,393 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-03-20 07:28:52,393 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 331 transitions. [2022-03-20 07:28:52,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 07:28:52,394 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:52,394 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:52,394 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 07:28:52,394 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:52,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1272058172, now seen corresponding path program 1 times [2022-03-20 07:28:52,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:52,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043926259] [2022-03-20 07:28:52,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:52,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:52,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:52,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:52,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043926259] [2022-03-20 07:28:52,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043926259] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:52,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:52,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:52,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082460784] [2022-03-20 07:28:52,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:52,430 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:52,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:52,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:52,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:52,431 INFO L87 Difference]: Start difference. First operand 183 states and 331 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-20 07:28:52,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:52,496 INFO L93 Difference]: Finished difference Result 187 states and 332 transitions. [2022-03-20 07:28:52,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:52,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2022-03-20 07:28:52,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:52,508 INFO L225 Difference]: With dead ends: 187 [2022-03-20 07:28:52,508 INFO L226 Difference]: Without dead ends: 187 [2022-03-20 07:28:52,508 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:52,509 INFO L913 BasicCegarLoop]: 143 mSDtfsCounter, 182 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:52,510 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 150 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:52,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-03-20 07:28:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2022-03-20 07:28:52,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 181 states have (on average 1.8121546961325967) internal successors, (328), 181 states have internal predecessors, (328), 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) [2022-03-20 07:28:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 331 transitions. [2022-03-20 07:28:52,515 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 331 transitions. Word has length 27 [2022-03-20 07:28:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:52,515 INFO L478 AbstractCegarLoop]: Abstraction has 185 states and 331 transitions. [2022-03-20 07:28:52,515 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-20 07:28:52,515 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 331 transitions. [2022-03-20 07:28:52,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 07:28:52,521 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:52,521 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:52,521 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 07:28:52,521 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:52,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:52,522 INFO L85 PathProgramCache]: Analyzing trace with hash 2025836771, now seen corresponding path program 1 times [2022-03-20 07:28:52,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:52,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340753507] [2022-03-20 07:28:52,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:52,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:52,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:52,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:52,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340753507] [2022-03-20 07:28:52,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340753507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:52,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:52,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:52,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508427537] [2022-03-20 07:28:52,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:52,556 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:52,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:52,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:52,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:52,556 INFO L87 Difference]: Start difference. First operand 185 states and 331 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-20 07:28:52,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:52,622 INFO L93 Difference]: Finished difference Result 347 states and 628 transitions. [2022-03-20 07:28:52,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:52,622 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2022-03-20 07:28:52,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:52,623 INFO L225 Difference]: With dead ends: 347 [2022-03-20 07:28:52,623 INFO L226 Difference]: Without dead ends: 347 [2022-03-20 07:28:52,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:52,625 INFO L913 BasicCegarLoop]: 93 mSDtfsCounter, 222 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:52,625 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 100 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-20 07:28:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 249. [2022-03-20 07:28:52,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 245 states have (on average 1.7959183673469388) internal successors, (440), 245 states have internal predecessors, (440), 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) [2022-03-20 07:28:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 443 transitions. [2022-03-20 07:28:52,632 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 443 transitions. Word has length 27 [2022-03-20 07:28:52,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:52,632 INFO L478 AbstractCegarLoop]: Abstraction has 249 states and 443 transitions. [2022-03-20 07:28:52,633 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-20 07:28:52,633 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 443 transitions. [2022-03-20 07:28:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 07:28:52,634 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:52,634 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:52,634 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 07:28:52,635 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:52,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:52,635 INFO L85 PathProgramCache]: Analyzing trace with hash -915820828, now seen corresponding path program 1 times [2022-03-20 07:28:52,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:52,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311242359] [2022-03-20 07:28:52,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:52,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:52,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:52,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:52,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:52,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311242359] [2022-03-20 07:28:52,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311242359] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:52,680 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:52,680 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:52,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232885595] [2022-03-20 07:28:52,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:52,680 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:52,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:52,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:52,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:52,681 INFO L87 Difference]: Start difference. First operand 249 states and 443 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-20 07:28:52,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:52,752 INFO L93 Difference]: Finished difference Result 355 states and 628 transitions. [2022-03-20 07:28:52,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:52,753 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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 27 [2022-03-20 07:28:52,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:52,759 INFO L225 Difference]: With dead ends: 355 [2022-03-20 07:28:52,759 INFO L226 Difference]: Without dead ends: 355 [2022-03-20 07:28:52,760 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:52,760 INFO L913 BasicCegarLoop]: 124 mSDtfsCounter, 196 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:52,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 131 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:52,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-03-20 07:28:52,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 353. [2022-03-20 07:28:52,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 349 states have (on average 1.7879656160458453) internal successors, (624), 349 states have internal predecessors, (624), 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) [2022-03-20 07:28:52,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 627 transitions. [2022-03-20 07:28:52,769 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 627 transitions. Word has length 27 [2022-03-20 07:28:52,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:52,769 INFO L478 AbstractCegarLoop]: Abstraction has 353 states and 627 transitions. [2022-03-20 07:28:52,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 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) [2022-03-20 07:28:52,769 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 627 transitions. [2022-03-20 07:28:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 07:28:52,770 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:52,770 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:52,770 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 07:28:52,770 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:52,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:52,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1623537198, now seen corresponding path program 1 times [2022-03-20 07:28:52,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:52,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130319654] [2022-03-20 07:28:52,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:52,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:52,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:52,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:52,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130319654] [2022-03-20 07:28:52,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130319654] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:52,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:52,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:52,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644567937] [2022-03-20 07:28:52,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:52,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:52,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:52,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:52,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:52,798 INFO L87 Difference]: Start difference. First operand 353 states and 627 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-20 07:28:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:52,865 INFO L93 Difference]: Finished difference Result 359 states and 628 transitions. [2022-03-20 07:28:52,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:52,865 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2022-03-20 07:28:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:52,866 INFO L225 Difference]: With dead ends: 359 [2022-03-20 07:28:52,866 INFO L226 Difference]: Without dead ends: 359 [2022-03-20 07:28:52,866 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:52,867 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:52,867 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 147 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:52,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2022-03-20 07:28:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 357. [2022-03-20 07:28:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 353 states have (on average 1.7677053824362605) internal successors, (624), 353 states have internal predecessors, (624), 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) [2022-03-20 07:28:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 627 transitions. [2022-03-20 07:28:52,873 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 627 transitions. Word has length 28 [2022-03-20 07:28:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:52,873 INFO L478 AbstractCegarLoop]: Abstraction has 357 states and 627 transitions. [2022-03-20 07:28:52,873 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-20 07:28:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 627 transitions. [2022-03-20 07:28:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 07:28:52,874 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:52,874 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:52,874 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 07:28:52,874 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:52,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:52,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1674357745, now seen corresponding path program 1 times [2022-03-20 07:28:52,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:52,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933023240] [2022-03-20 07:28:52,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:52,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:52,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:52,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933023240] [2022-03-20 07:28:52,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933023240] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:52,900 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:52,900 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:52,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099693047] [2022-03-20 07:28:52,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:52,900 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:52,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:52,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:52,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:52,901 INFO L87 Difference]: Start difference. First operand 357 states and 627 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-20 07:28:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:52,968 INFO L93 Difference]: Finished difference Result 667 states and 1184 transitions. [2022-03-20 07:28:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:52,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2022-03-20 07:28:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:52,971 INFO L225 Difference]: With dead ends: 667 [2022-03-20 07:28:52,971 INFO L226 Difference]: Without dead ends: 667 [2022-03-20 07:28:52,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:52,972 INFO L913 BasicCegarLoop]: 92 mSDtfsCounter, 215 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:52,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 99 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:52,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2022-03-20 07:28:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 489. [2022-03-20 07:28:52,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 485 states have (on average 1.7402061855670103) internal successors, (844), 485 states have internal predecessors, (844), 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) [2022-03-20 07:28:52,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 847 transitions. [2022-03-20 07:28:52,980 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 847 transitions. Word has length 28 [2022-03-20 07:28:52,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:52,980 INFO L478 AbstractCegarLoop]: Abstraction has 489 states and 847 transitions. [2022-03-20 07:28:52,980 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-20 07:28:52,980 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 847 transitions. [2022-03-20 07:28:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 07:28:52,981 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:52,981 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:52,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 07:28:52,981 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1267299854, now seen corresponding path program 1 times [2022-03-20 07:28:52,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:52,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263260710] [2022-03-20 07:28:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:52,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:53,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:53,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263260710] [2022-03-20 07:28:53,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [263260710] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:53,005 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:53,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:53,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760748016] [2022-03-20 07:28:53,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:53,005 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:53,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:53,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:53,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:53,006 INFO L87 Difference]: Start difference. First operand 489 states and 847 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-20 07:28:53,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:53,073 INFO L93 Difference]: Finished difference Result 691 states and 1192 transitions. [2022-03-20 07:28:53,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:53,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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 28 [2022-03-20 07:28:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:53,075 INFO L225 Difference]: With dead ends: 691 [2022-03-20 07:28:53,075 INFO L226 Difference]: Without dead ends: 691 [2022-03-20 07:28:53,076 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:53,076 INFO L913 BasicCegarLoop]: 126 mSDtfsCounter, 190 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:53,077 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 133 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:53,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-20 07:28:53,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 689. [2022-03-20 07:28:53,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 689 states, 685 states have (on average 1.7343065693430657) internal successors, (1188), 685 states have internal predecessors, (1188), 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) [2022-03-20 07:28:53,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 689 states to 689 states and 1191 transitions. [2022-03-20 07:28:53,088 INFO L78 Accepts]: Start accepts. Automaton has 689 states and 1191 transitions. Word has length 28 [2022-03-20 07:28:53,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:53,088 INFO L478 AbstractCegarLoop]: Abstraction has 689 states and 1191 transitions. [2022-03-20 07:28:53,088 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 3 states have internal predecessors, (25), 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) [2022-03-20 07:28:53,088 INFO L276 IsEmpty]: Start isEmpty. Operand 689 states and 1191 transitions. [2022-03-20 07:28:53,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 07:28:53,089 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:53,089 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:53,089 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 07:28:53,089 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:53,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:53,090 INFO L85 PathProgramCache]: Analyzing trace with hash 365515008, now seen corresponding path program 1 times [2022-03-20 07:28:53,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:53,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135006786] [2022-03-20 07:28:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:53,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:53,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:53,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135006786] [2022-03-20 07:28:53,120 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135006786] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:53,120 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:53,120 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:53,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839121180] [2022-03-20 07:28:53,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:53,120 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:53,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:53,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:53,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:53,121 INFO L87 Difference]: Start difference. First operand 689 states and 1191 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-20 07:28:53,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:53,186 INFO L93 Difference]: Finished difference Result 699 states and 1192 transitions. [2022-03-20 07:28:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:53,186 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2022-03-20 07:28:53,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:53,188 INFO L225 Difference]: With dead ends: 699 [2022-03-20 07:28:53,189 INFO L226 Difference]: Without dead ends: 699 [2022-03-20 07:28:53,189 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:53,189 INFO L913 BasicCegarLoop]: 137 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:53,189 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 144 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:53,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2022-03-20 07:28:53,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 697. [2022-03-20 07:28:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 693 states have (on average 1.7142857142857142) internal successors, (1188), 693 states have internal predecessors, (1188), 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) [2022-03-20 07:28:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 1191 transitions. [2022-03-20 07:28:53,199 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 1191 transitions. Word has length 29 [2022-03-20 07:28:53,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:53,200 INFO L478 AbstractCegarLoop]: Abstraction has 697 states and 1191 transitions. [2022-03-20 07:28:53,200 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-20 07:28:53,200 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 1191 transitions. [2022-03-20 07:28:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 07:28:53,200 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:53,200 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:53,200 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 07:28:53,201 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:53,201 INFO L85 PathProgramCache]: Analyzing trace with hash -631557345, now seen corresponding path program 1 times [2022-03-20 07:28:53,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:53,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713839507] [2022-03-20 07:28:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:53,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:53,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:53,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:53,232 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713839507] [2022-03-20 07:28:53,233 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713839507] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:53,233 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:53,233 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:53,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399019120] [2022-03-20 07:28:53,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:53,233 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:53,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:53,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:53,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:53,234 INFO L87 Difference]: Start difference. First operand 697 states and 1191 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-20 07:28:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:53,304 INFO L93 Difference]: Finished difference Result 1291 states and 2232 transitions. [2022-03-20 07:28:53,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:53,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2022-03-20 07:28:53,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:53,308 INFO L225 Difference]: With dead ends: 1291 [2022-03-20 07:28:53,308 INFO L226 Difference]: Without dead ends: 1291 [2022-03-20 07:28:53,309 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:53,309 INFO L913 BasicCegarLoop]: 91 mSDtfsCounter, 208 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:53,309 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 98 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:53,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1291 states. [2022-03-20 07:28:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1291 to 969. [2022-03-20 07:28:53,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 965 states have (on average 1.6787564766839378) internal successors, (1620), 965 states have internal predecessors, (1620), 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) [2022-03-20 07:28:53,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1623 transitions. [2022-03-20 07:28:53,325 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1623 transitions. Word has length 29 [2022-03-20 07:28:53,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:53,325 INFO L478 AbstractCegarLoop]: Abstraction has 969 states and 1623 transitions. [2022-03-20 07:28:53,326 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-20 07:28:53,326 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1623 transitions. [2022-03-20 07:28:53,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-20 07:28:53,327 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:53,327 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:53,327 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 07:28:53,327 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:53,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:53,328 INFO L85 PathProgramCache]: Analyzing trace with hash 721752352, now seen corresponding path program 1 times [2022-03-20 07:28:53,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:53,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100790976] [2022-03-20 07:28:53,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:53,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:53,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:53,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:53,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100790976] [2022-03-20 07:28:53,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100790976] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:53,356 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:53,357 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:53,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162116350] [2022-03-20 07:28:53,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:53,357 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:53,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:53,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:53,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:53,357 INFO L87 Difference]: Start difference. First operand 969 states and 1623 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-20 07:28:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:53,424 INFO L93 Difference]: Finished difference Result 1355 states and 2264 transitions. [2022-03-20 07:28:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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 29 [2022-03-20 07:28:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:53,428 INFO L225 Difference]: With dead ends: 1355 [2022-03-20 07:28:53,428 INFO L226 Difference]: Without dead ends: 1355 [2022-03-20 07:28:53,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:53,429 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 184 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:53,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 135 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:53,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1355 states. [2022-03-20 07:28:53,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1355 to 1353. [2022-03-20 07:28:53,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1353 states, 1349 states have (on average 1.67531504818384) internal successors, (2260), 1349 states have internal predecessors, (2260), 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) [2022-03-20 07:28:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1353 states to 1353 states and 2263 transitions. [2022-03-20 07:28:53,448 INFO L78 Accepts]: Start accepts. Automaton has 1353 states and 2263 transitions. Word has length 29 [2022-03-20 07:28:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:53,448 INFO L478 AbstractCegarLoop]: Abstraction has 1353 states and 2263 transitions. [2022-03-20 07:28:53,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 3 states have internal predecessors, (26), 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) [2022-03-20 07:28:53,448 INFO L276 IsEmpty]: Start isEmpty. Operand 1353 states and 2263 transitions. [2022-03-20 07:28:53,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 07:28:53,449 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:53,449 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:53,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 07:28:53,449 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:53,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:53,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1896591374, now seen corresponding path program 1 times [2022-03-20 07:28:53,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:53,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245760893] [2022-03-20 07:28:53,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:53,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:53,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:53,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:53,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245760893] [2022-03-20 07:28:53,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245760893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:53,472 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:53,472 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139293707] [2022-03-20 07:28:53,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:53,473 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:53,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:53,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:53,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:53,473 INFO L87 Difference]: Start difference. First operand 1353 states and 2263 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-20 07:28:53,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:53,537 INFO L93 Difference]: Finished difference Result 1371 states and 2264 transitions. [2022-03-20 07:28:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:53,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2022-03-20 07:28:53,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:53,541 INFO L225 Difference]: With dead ends: 1371 [2022-03-20 07:28:53,542 INFO L226 Difference]: Without dead ends: 1371 [2022-03-20 07:28:53,542 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:53,542 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 179 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:53,542 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 141 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:53,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-03-20 07:28:53,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1369. [2022-03-20 07:28:53,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1365 states have (on average 1.6556776556776556) internal successors, (2260), 1365 states have internal predecessors, (2260), 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) [2022-03-20 07:28:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2263 transitions. [2022-03-20 07:28:53,561 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2263 transitions. Word has length 30 [2022-03-20 07:28:53,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:53,562 INFO L478 AbstractCegarLoop]: Abstraction has 1369 states and 2263 transitions. [2022-03-20 07:28:53,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-20 07:28:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2263 transitions. [2022-03-20 07:28:53,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 07:28:53,563 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:53,563 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:53,563 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 07:28:53,563 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:53,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:53,563 INFO L85 PathProgramCache]: Analyzing trace with hash 899519021, now seen corresponding path program 1 times [2022-03-20 07:28:53,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:53,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872147815] [2022-03-20 07:28:53,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:53,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:53,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:53,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:53,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872147815] [2022-03-20 07:28:53,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872147815] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:53,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:53,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:53,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488430252] [2022-03-20 07:28:53,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:53,590 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:53,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:53,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:53,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:53,591 INFO L87 Difference]: Start difference. First operand 1369 states and 2263 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-20 07:28:53,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:53,661 INFO L93 Difference]: Finished difference Result 2507 states and 4200 transitions. [2022-03-20 07:28:53,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:53,661 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2022-03-20 07:28:53,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:53,668 INFO L225 Difference]: With dead ends: 2507 [2022-03-20 07:28:53,668 INFO L226 Difference]: Without dead ends: 2507 [2022-03-20 07:28:53,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:53,668 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 201 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:53,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 97 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2507 states. [2022-03-20 07:28:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2507 to 1929. [2022-03-20 07:28:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1929 states, 1925 states have (on average 1.6145454545454545) internal successors, (3108), 1925 states have internal predecessors, (3108), 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) [2022-03-20 07:28:53,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1929 states to 1929 states and 3111 transitions. [2022-03-20 07:28:53,697 INFO L78 Accepts]: Start accepts. Automaton has 1929 states and 3111 transitions. Word has length 30 [2022-03-20 07:28:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:53,697 INFO L478 AbstractCegarLoop]: Abstraction has 1929 states and 3111 transitions. [2022-03-20 07:28:53,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-20 07:28:53,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1929 states and 3111 transitions. [2022-03-20 07:28:53,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 07:28:53,699 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:53,699 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:53,699 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 07:28:53,699 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:53,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:53,700 INFO L85 PathProgramCache]: Analyzing trace with hash -2042138578, now seen corresponding path program 1 times [2022-03-20 07:28:53,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:53,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197950399] [2022-03-20 07:28:53,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:53,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:53,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:53,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:53,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:53,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197950399] [2022-03-20 07:28:53,720 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197950399] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:53,720 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:53,720 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:53,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441379689] [2022-03-20 07:28:53,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:53,720 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:53,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:53,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:53,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:53,721 INFO L87 Difference]: Start difference. First operand 1929 states and 3111 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-20 07:28:53,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:53,789 INFO L93 Difference]: Finished difference Result 2667 states and 4296 transitions. [2022-03-20 07:28:53,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:53,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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 30 [2022-03-20 07:28:53,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:53,796 INFO L225 Difference]: With dead ends: 2667 [2022-03-20 07:28:53,797 INFO L226 Difference]: Without dead ends: 2667 [2022-03-20 07:28:53,797 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:53,797 INFO L913 BasicCegarLoop]: 130 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:53,797 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 137 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:53,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2667 states. [2022-03-20 07:28:53,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2667 to 2665. [2022-03-20 07:28:53,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2665 states, 2661 states have (on average 1.6129274708756107) internal successors, (4292), 2661 states have internal predecessors, (4292), 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) [2022-03-20 07:28:53,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2665 states to 2665 states and 4295 transitions. [2022-03-20 07:28:53,838 INFO L78 Accepts]: Start accepts. Automaton has 2665 states and 4295 transitions. Word has length 30 [2022-03-20 07:28:53,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:53,839 INFO L478 AbstractCegarLoop]: Abstraction has 2665 states and 4295 transitions. [2022-03-20 07:28:53,839 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 states have internal predecessors, (27), 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) [2022-03-20 07:28:53,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2665 states and 4295 transitions. [2022-03-20 07:28:53,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 07:28:53,840 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:53,841 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:53,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 07:28:53,841 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash 2115318588, now seen corresponding path program 1 times [2022-03-20 07:28:53,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:53,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373598083] [2022-03-20 07:28:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:53,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:53,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:53,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:53,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:53,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373598083] [2022-03-20 07:28:53,865 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373598083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:53,865 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:53,865 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:53,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387084419] [2022-03-20 07:28:53,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:53,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:53,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:53,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:53,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:53,866 INFO L87 Difference]: Start difference. First operand 2665 states and 4295 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-20 07:28:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:53,954 INFO L93 Difference]: Finished difference Result 2699 states and 4296 transitions. [2022-03-20 07:28:53,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:53,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2022-03-20 07:28:53,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:53,966 INFO L225 Difference]: With dead ends: 2699 [2022-03-20 07:28:53,966 INFO L226 Difference]: Without dead ends: 2699 [2022-03-20 07:28:53,966 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:53,967 INFO L913 BasicCegarLoop]: 131 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:53,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 138 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:53,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2022-03-20 07:28:54,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2697. [2022-03-20 07:28:54,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2697 states, 2693 states have (on average 1.5937616041589306) internal successors, (4292), 2693 states have internal predecessors, (4292), 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) [2022-03-20 07:28:54,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2697 states to 2697 states and 4295 transitions. [2022-03-20 07:28:54,016 INFO L78 Accepts]: Start accepts. Automaton has 2697 states and 4295 transitions. Word has length 31 [2022-03-20 07:28:54,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:54,016 INFO L478 AbstractCegarLoop]: Abstraction has 2697 states and 4295 transitions. [2022-03-20 07:28:54,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-20 07:28:54,016 INFO L276 IsEmpty]: Start isEmpty. Operand 2697 states and 4295 transitions. [2022-03-20 07:28:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 07:28:54,018 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:54,018 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:54,018 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 07:28:54,018 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:54,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:54,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1118246235, now seen corresponding path program 1 times [2022-03-20 07:28:54,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:54,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268150335] [2022-03-20 07:28:54,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:54,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:54,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:54,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:54,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:54,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:54,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268150335] [2022-03-20 07:28:54,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268150335] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:54,051 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:54,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:54,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702926904] [2022-03-20 07:28:54,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:54,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:54,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:54,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:54,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:54,053 INFO L87 Difference]: Start difference. First operand 2697 states and 4295 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-20 07:28:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:54,123 INFO L93 Difference]: Finished difference Result 4875 states and 7880 transitions. [2022-03-20 07:28:54,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:54,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2022-03-20 07:28:54,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:54,136 INFO L225 Difference]: With dead ends: 4875 [2022-03-20 07:28:54,136 INFO L226 Difference]: Without dead ends: 4875 [2022-03-20 07:28:54,136 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:54,137 INFO L913 BasicCegarLoop]: 89 mSDtfsCounter, 194 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:54,137 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 96 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:28:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4875 states. [2022-03-20 07:28:54,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4875 to 3849. [2022-03-20 07:28:54,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3849 states, 3845 states have (on average 1.5490247074122236) internal successors, (5956), 3845 states have internal predecessors, (5956), 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) [2022-03-20 07:28:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3849 states to 3849 states and 5959 transitions. [2022-03-20 07:28:54,200 INFO L78 Accepts]: Start accepts. Automaton has 3849 states and 5959 transitions. Word has length 31 [2022-03-20 07:28:54,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:54,201 INFO L478 AbstractCegarLoop]: Abstraction has 3849 states and 5959 transitions. [2022-03-20 07:28:54,201 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-20 07:28:54,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3849 states and 5959 transitions. [2022-03-20 07:28:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-03-20 07:28:54,204 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:54,204 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:54,204 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 07:28:54,204 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:54,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:54,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1823411364, now seen corresponding path program 1 times [2022-03-20 07:28:54,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:54,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027551361] [2022-03-20 07:28:54,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:54,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:54,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:54,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:54,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:54,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:54,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027551361] [2022-03-20 07:28:54,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027551361] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:54,226 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:54,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:54,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942727738] [2022-03-20 07:28:54,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:54,226 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:54,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:54,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:54,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:54,227 INFO L87 Difference]: Start difference. First operand 3849 states and 5959 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-20 07:28:54,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:54,295 INFO L93 Difference]: Finished difference Result 5259 states and 8136 transitions. [2022-03-20 07:28:54,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:54,295 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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 31 [2022-03-20 07:28:54,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:54,318 INFO L225 Difference]: With dead ends: 5259 [2022-03-20 07:28:54,319 INFO L226 Difference]: Without dead ends: 5259 [2022-03-20 07:28:54,319 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:54,320 INFO L913 BasicCegarLoop]: 132 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:54,320 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 139 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:28:54,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5259 states. [2022-03-20 07:28:54,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5259 to 5257. [2022-03-20 07:28:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5257 states, 5253 states have (on average 1.5480677707976394) internal successors, (8132), 5253 states have internal predecessors, (8132), 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) [2022-03-20 07:28:54,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5257 states to 5257 states and 8135 transitions. [2022-03-20 07:28:54,402 INFO L78 Accepts]: Start accepts. Automaton has 5257 states and 8135 transitions. Word has length 31 [2022-03-20 07:28:54,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:54,402 INFO L478 AbstractCegarLoop]: Abstraction has 5257 states and 8135 transitions. [2022-03-20 07:28:54,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 3 states have internal predecessors, (28), 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) [2022-03-20 07:28:54,403 INFO L276 IsEmpty]: Start isEmpty. Operand 5257 states and 8135 transitions. [2022-03-20 07:28:54,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 07:28:54,408 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:54,408 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:54,408 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 07:28:54,408 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:54,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:54,410 INFO L85 PathProgramCache]: Analyzing trace with hash 305927754, now seen corresponding path program 1 times [2022-03-20 07:28:54,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:54,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286658929] [2022-03-20 07:28:54,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:54,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:54,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:54,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:54,433 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286658929] [2022-03-20 07:28:54,433 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286658929] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:54,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:54,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:54,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951056650] [2022-03-20 07:28:54,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:54,434 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:54,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:54,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:54,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:54,435 INFO L87 Difference]: Start difference. First operand 5257 states and 8135 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-20 07:28:54,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:54,529 INFO L93 Difference]: Finished difference Result 5323 states and 8136 transitions. [2022-03-20 07:28:54,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:54,530 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2022-03-20 07:28:54,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:54,537 INFO L225 Difference]: With dead ends: 5323 [2022-03-20 07:28:54,537 INFO L226 Difference]: Without dead ends: 5323 [2022-03-20 07:28:54,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:54,538 INFO L913 BasicCegarLoop]: 128 mSDtfsCounter, 177 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:54,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 135 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:28:54,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5323 states. [2022-03-20 07:28:54,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5323 to 5321. [2022-03-20 07:28:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5321 states, 5317 states have (on average 1.529433891292082) internal successors, (8132), 5317 states have internal predecessors, (8132), 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) [2022-03-20 07:28:54,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8135 transitions. [2022-03-20 07:28:54,627 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8135 transitions. Word has length 32 [2022-03-20 07:28:54,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:54,627 INFO L478 AbstractCegarLoop]: Abstraction has 5321 states and 8135 transitions. [2022-03-20 07:28:54,628 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-20 07:28:54,628 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8135 transitions. [2022-03-20 07:28:54,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 07:28:54,632 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:54,632 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:54,632 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 07:28:54,632 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:54,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:54,632 INFO L85 PathProgramCache]: Analyzing trace with hash -691144599, now seen corresponding path program 1 times [2022-03-20 07:28:54,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:54,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911656987] [2022-03-20 07:28:54,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:54,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:54,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:54,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:54,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:54,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:54,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911656987] [2022-03-20 07:28:54,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911656987] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:54,660 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:54,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:54,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053692992] [2022-03-20 07:28:54,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:54,660 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:54,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:54,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:54,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:54,661 INFO L87 Difference]: Start difference. First operand 5321 states and 8135 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-20 07:28:54,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:54,740 INFO L93 Difference]: Finished difference Result 9483 states and 14728 transitions. [2022-03-20 07:28:54,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:54,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2022-03-20 07:28:54,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:54,756 INFO L225 Difference]: With dead ends: 9483 [2022-03-20 07:28:54,756 INFO L226 Difference]: Without dead ends: 9483 [2022-03-20 07:28:54,756 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:54,757 INFO L913 BasicCegarLoop]: 88 mSDtfsCounter, 187 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:54,757 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 95 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:54,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9483 states. [2022-03-20 07:28:54,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9483 to 7689. [2022-03-20 07:28:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7689 states, 7685 states have (on average 1.4828887443070917) internal successors, (11396), 7685 states have internal predecessors, (11396), 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) [2022-03-20 07:28:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7689 states to 7689 states and 11399 transitions. [2022-03-20 07:28:54,864 INFO L78 Accepts]: Start accepts. Automaton has 7689 states and 11399 transitions. Word has length 32 [2022-03-20 07:28:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:54,864 INFO L478 AbstractCegarLoop]: Abstraction has 7689 states and 11399 transitions. [2022-03-20 07:28:54,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-20 07:28:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 7689 states and 11399 transitions. [2022-03-20 07:28:54,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 07:28:54,870 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:54,871 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:54,871 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 07:28:54,871 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:54,871 INFO L85 PathProgramCache]: Analyzing trace with hash 662165098, now seen corresponding path program 1 times [2022-03-20 07:28:54,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:54,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929016357] [2022-03-20 07:28:54,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:54,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:54,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:54,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:54,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:54,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929016357] [2022-03-20 07:28:54,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929016357] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:54,890 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:54,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:54,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019454445] [2022-03-20 07:28:54,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:54,890 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:54,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:54,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:54,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:54,891 INFO L87 Difference]: Start difference. First operand 7689 states and 11399 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-20 07:28:54,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:54,973 INFO L93 Difference]: Finished difference Result 10379 states and 15368 transitions. [2022-03-20 07:28:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:54,973 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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 32 [2022-03-20 07:28:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:54,989 INFO L225 Difference]: With dead ends: 10379 [2022-03-20 07:28:54,989 INFO L226 Difference]: Without dead ends: 10379 [2022-03-20 07:28:54,989 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:54,989 INFO L913 BasicCegarLoop]: 134 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:54,990 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 141 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:54,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2022-03-20 07:28:55,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2022-03-20 07:28:55,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 10373 states have (on average 1.4811529933481153) internal successors, (15364), 10373 states have internal predecessors, (15364), 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) [2022-03-20 07:28:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 15367 transitions. [2022-03-20 07:28:55,157 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 15367 transitions. Word has length 32 [2022-03-20 07:28:55,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:55,157 INFO L478 AbstractCegarLoop]: Abstraction has 10377 states and 15367 transitions. [2022-03-20 07:28:55,157 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 3 states have internal predecessors, (29), 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) [2022-03-20 07:28:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 15367 transitions. [2022-03-20 07:28:55,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 07:28:55,163 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:55,164 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:55,164 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 07:28:55,164 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:55,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:55,164 INFO L85 PathProgramCache]: Analyzing trace with hash 49386872, now seen corresponding path program 1 times [2022-03-20 07:28:55,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:55,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461339476] [2022-03-20 07:28:55,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:55,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:55,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:55,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:55,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:55,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:55,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461339476] [2022-03-20 07:28:55,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461339476] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:55,190 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:55,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:55,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295668522] [2022-03-20 07:28:55,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:55,191 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:55,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:55,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:55,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:55,192 INFO L87 Difference]: Start difference. First operand 10377 states and 15367 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-20 07:28:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:55,272 INFO L93 Difference]: Finished difference Result 10507 states and 15368 transitions. [2022-03-20 07:28:55,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:55,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-03-20 07:28:55,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:55,288 INFO L225 Difference]: With dead ends: 10507 [2022-03-20 07:28:55,288 INFO L226 Difference]: Without dead ends: 10507 [2022-03-20 07:28:55,288 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:55,290 INFO L913 BasicCegarLoop]: 125 mSDtfsCounter, 176 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:55,291 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 132 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 07:28:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10507 states. [2022-03-20 07:28:55,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10507 to 10505. [2022-03-20 07:28:55,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10505 states, 10501 states have (on average 1.4630987524997618) internal successors, (15364), 10501 states have internal predecessors, (15364), 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) [2022-03-20 07:28:55,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10505 states to 10505 states and 15367 transitions. [2022-03-20 07:28:55,416 INFO L78 Accepts]: Start accepts. Automaton has 10505 states and 15367 transitions. Word has length 33 [2022-03-20 07:28:55,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:55,416 INFO L478 AbstractCegarLoop]: Abstraction has 10505 states and 15367 transitions. [2022-03-20 07:28:55,416 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-20 07:28:55,417 INFO L276 IsEmpty]: Start isEmpty. Operand 10505 states and 15367 transitions. [2022-03-20 07:28:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 07:28:55,423 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:55,423 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:55,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 07:28:55,424 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:55,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:55,424 INFO L85 PathProgramCache]: Analyzing trace with hash -947685481, now seen corresponding path program 1 times [2022-03-20 07:28:55,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:55,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287636724] [2022-03-20 07:28:55,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:55,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:55,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:55,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:55,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287636724] [2022-03-20 07:28:55,448 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287636724] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:55,448 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:55,448 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:55,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085153167] [2022-03-20 07:28:55,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:55,448 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:55,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:55,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:55,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:55,449 INFO L87 Difference]: Start difference. First operand 10505 states and 15367 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-20 07:28:55,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:55,565 INFO L93 Difference]: Finished difference Result 18443 states and 27400 transitions. [2022-03-20 07:28:55,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:55,566 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-03-20 07:28:55,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:55,593 INFO L225 Difference]: With dead ends: 18443 [2022-03-20 07:28:55,593 INFO L226 Difference]: Without dead ends: 18443 [2022-03-20 07:28:55,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:55,594 INFO L913 BasicCegarLoop]: 87 mSDtfsCounter, 180 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:55,597 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 94 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:55,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18443 states. [2022-03-20 07:28:55,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18443 to 15369. [2022-03-20 07:28:55,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15369 states, 15365 states have (on average 1.4164659941425317) internal successors, (21764), 15365 states have internal predecessors, (21764), 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) [2022-03-20 07:28:55,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15369 states to 15369 states and 21767 transitions. [2022-03-20 07:28:55,789 INFO L78 Accepts]: Start accepts. Automaton has 15369 states and 21767 transitions. Word has length 33 [2022-03-20 07:28:55,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:55,789 INFO L478 AbstractCegarLoop]: Abstraction has 15369 states and 21767 transitions. [2022-03-20 07:28:55,789 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-20 07:28:55,789 INFO L276 IsEmpty]: Start isEmpty. Operand 15369 states and 21767 transitions. [2022-03-20 07:28:55,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 07:28:55,800 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:55,800 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:55,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 07:28:55,801 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:55,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash 405624216, now seen corresponding path program 1 times [2022-03-20 07:28:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:55,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614918249] [2022-03-20 07:28:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:55,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:55,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:55,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:55,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:55,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:55,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614918249] [2022-03-20 07:28:55,824 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614918249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:55,824 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:55,824 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:55,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730195179] [2022-03-20 07:28:55,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:55,824 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:55,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:55,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:55,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:55,825 INFO L87 Difference]: Start difference. First operand 15369 states and 21767 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-20 07:28:55,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:55,969 INFO L93 Difference]: Finished difference Result 20491 states and 28936 transitions. [2022-03-20 07:28:55,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:55,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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 33 [2022-03-20 07:28:55,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:55,997 INFO L225 Difference]: With dead ends: 20491 [2022-03-20 07:28:55,997 INFO L226 Difference]: Without dead ends: 20491 [2022-03-20 07:28:55,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:55,997 INFO L913 BasicCegarLoop]: 136 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:55,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 143 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20491 states. [2022-03-20 07:28:56,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20491 to 20489. [2022-03-20 07:28:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20489 states, 20485 states have (on average 1.4123505003661216) internal successors, (28932), 20485 states have internal predecessors, (28932), 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) [2022-03-20 07:28:56,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20489 states to 20489 states and 28935 transitions. [2022-03-20 07:28:56,193 INFO L78 Accepts]: Start accepts. Automaton has 20489 states and 28935 transitions. Word has length 33 [2022-03-20 07:28:56,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:56,193 INFO L478 AbstractCegarLoop]: Abstraction has 20489 states and 28935 transitions. [2022-03-20 07:28:56,193 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 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) [2022-03-20 07:28:56,193 INFO L276 IsEmpty]: Start isEmpty. Operand 20489 states and 28935 transitions. [2022-03-20 07:28:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 07:28:56,205 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:56,205 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:56,205 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 07:28:56,205 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:56,206 INFO L85 PathProgramCache]: Analyzing trace with hash 686554246, now seen corresponding path program 1 times [2022-03-20 07:28:56,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:56,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061566015] [2022-03-20 07:28:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:56,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:56,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:56,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:56,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:56,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:56,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:56,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061566015] [2022-03-20 07:28:56,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061566015] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:56,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:56,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:56,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597365894] [2022-03-20 07:28:56,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:56,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:56,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:56,272 INFO L87 Difference]: Start difference. First operand 20489 states and 28935 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-20 07:28:56,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:56,380 INFO L93 Difference]: Finished difference Result 20747 states and 28936 transitions. [2022-03-20 07:28:56,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:56,381 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2022-03-20 07:28:56,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:56,411 INFO L225 Difference]: With dead ends: 20747 [2022-03-20 07:28:56,412 INFO L226 Difference]: Without dead ends: 20747 [2022-03-20 07:28:56,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:56,412 INFO L913 BasicCegarLoop]: 122 mSDtfsCounter, 175 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:56,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 129 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:56,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20747 states. [2022-03-20 07:28:56,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20747 to 20745. [2022-03-20 07:28:56,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20745 states, 20741 states have (on average 1.3949182778072418) internal successors, (28932), 20741 states have internal predecessors, (28932), 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) [2022-03-20 07:28:56,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20745 states to 20745 states and 28935 transitions. [2022-03-20 07:28:56,652 INFO L78 Accepts]: Start accepts. Automaton has 20745 states and 28935 transitions. Word has length 34 [2022-03-20 07:28:56,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:56,653 INFO L478 AbstractCegarLoop]: Abstraction has 20745 states and 28935 transitions. [2022-03-20 07:28:56,653 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-20 07:28:56,653 INFO L276 IsEmpty]: Start isEmpty. Operand 20745 states and 28935 transitions. [2022-03-20 07:28:56,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 07:28:56,669 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:56,669 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:56,670 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 07:28:56,670 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:56,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:56,670 INFO L85 PathProgramCache]: Analyzing trace with hash -310518107, now seen corresponding path program 1 times [2022-03-20 07:28:56,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:56,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004864060] [2022-03-20 07:28:56,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:56,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:56,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:56,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:56,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:56,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004864060] [2022-03-20 07:28:56,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004864060] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:56,689 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:56,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:56,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416162411] [2022-03-20 07:28:56,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:56,690 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:56,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:56,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:56,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:56,690 INFO L87 Difference]: Start difference. First operand 20745 states and 28935 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-20 07:28:56,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:56,826 INFO L93 Difference]: Finished difference Result 35851 states and 50696 transitions. [2022-03-20 07:28:56,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:56,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2022-03-20 07:28:56,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:56,886 INFO L225 Difference]: With dead ends: 35851 [2022-03-20 07:28:56,887 INFO L226 Difference]: Without dead ends: 35851 [2022-03-20 07:28:56,887 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:56,887 INFO L913 BasicCegarLoop]: 86 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:56,887 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 93 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:56,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35851 states. [2022-03-20 07:28:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35851 to 30729. [2022-03-20 07:28:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30729 states, 30725 states have (on average 1.3499104963384865) internal successors, (41476), 30725 states have internal predecessors, (41476), 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) [2022-03-20 07:28:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30729 states to 30729 states and 41479 transitions. [2022-03-20 07:28:57,354 INFO L78 Accepts]: Start accepts. Automaton has 30729 states and 41479 transitions. Word has length 34 [2022-03-20 07:28:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:57,354 INFO L478 AbstractCegarLoop]: Abstraction has 30729 states and 41479 transitions. [2022-03-20 07:28:57,354 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-20 07:28:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 30729 states and 41479 transitions. [2022-03-20 07:28:57,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 07:28:57,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:57,383 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:57,383 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 07:28:57,384 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:57,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:57,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1042791590, now seen corresponding path program 1 times [2022-03-20 07:28:57,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:57,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034279570] [2022-03-20 07:28:57,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:57,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:57,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:57,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:57,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:57,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034279570] [2022-03-20 07:28:57,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034279570] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:57,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:57,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:57,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481710222] [2022-03-20 07:28:57,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:57,408 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:57,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:57,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:57,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:57,409 INFO L87 Difference]: Start difference. First operand 30729 states and 41479 transitions. Second operand has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-20 07:28:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:57,547 INFO L93 Difference]: Finished difference Result 40459 states and 54280 transitions. [2022-03-20 07:28:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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 34 [2022-03-20 07:28:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:57,591 INFO L225 Difference]: With dead ends: 40459 [2022-03-20 07:28:57,591 INFO L226 Difference]: Without dead ends: 40459 [2022-03-20 07:28:57,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:57,592 INFO L913 BasicCegarLoop]: 138 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:57,592 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 145 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40459 states. [2022-03-20 07:28:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40459 to 40457. [2022-03-20 07:28:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40457 states, 40453 states have (on average 1.3417051887375473) internal successors, (54276), 40453 states have internal predecessors, (54276), 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) [2022-03-20 07:28:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40457 states to 40457 states and 54279 transitions. [2022-03-20 07:28:58,246 INFO L78 Accepts]: Start accepts. Automaton has 40457 states and 54279 transitions. Word has length 34 [2022-03-20 07:28:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:58,247 INFO L478 AbstractCegarLoop]: Abstraction has 40457 states and 54279 transitions. [2022-03-20 07:28:58,247 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.75) internal successors, (31), 3 states have internal predecessors, (31), 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) [2022-03-20 07:28:58,247 INFO L276 IsEmpty]: Start isEmpty. Operand 40457 states and 54279 transitions. [2022-03-20 07:28:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 07:28:58,266 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:58,266 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:58,266 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 07:28:58,266 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:58,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:58,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1036093516, now seen corresponding path program 1 times [2022-03-20 07:28:58,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:58,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971361988] [2022-03-20 07:28:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:58,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:58,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:58,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:58,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:58,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:58,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:58,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971361988] [2022-03-20 07:28:58,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971361988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:58,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:58,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:58,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223689461] [2022-03-20 07:28:58,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:58,287 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:58,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:58,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:58,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:58,287 INFO L87 Difference]: Start difference. First operand 40457 states and 54279 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-20 07:28:58,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:58,439 INFO L93 Difference]: Finished difference Result 40971 states and 54280 transitions. [2022-03-20 07:28:58,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:58,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2022-03-20 07:28:58,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:58,484 INFO L225 Difference]: With dead ends: 40971 [2022-03-20 07:28:58,485 INFO L226 Difference]: Without dead ends: 40971 [2022-03-20 07:28:58,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:58,486 INFO L913 BasicCegarLoop]: 119 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:58,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 126 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:58,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40971 states. [2022-03-20 07:28:59,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40971 to 40969. [2022-03-20 07:28:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40969 states, 40965 states have (on average 1.3249359209080922) internal successors, (54276), 40965 states have internal predecessors, (54276), 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) [2022-03-20 07:28:59,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40969 states to 40969 states and 54279 transitions. [2022-03-20 07:28:59,141 INFO L78 Accepts]: Start accepts. Automaton has 40969 states and 54279 transitions. Word has length 35 [2022-03-20 07:28:59,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:28:59,141 INFO L478 AbstractCegarLoop]: Abstraction has 40969 states and 54279 transitions. [2022-03-20 07:28:59,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-20 07:28:59,141 INFO L276 IsEmpty]: Start isEmpty. Operand 40969 states and 54279 transitions. [2022-03-20 07:28:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 07:28:59,161 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:28:59,161 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:28:59,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 07:28:59,161 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:28:59,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:28:59,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2033165869, now seen corresponding path program 1 times [2022-03-20 07:28:59,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:28:59,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926563630] [2022-03-20 07:28:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:28:59,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:28:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:59,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:28:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:28:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:28:59,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:28:59,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926563630] [2022-03-20 07:28:59,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926563630] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:28:59,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:28:59,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:28:59,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330544113] [2022-03-20 07:28:59,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:28:59,180 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:28:59,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:28:59,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:28:59,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:28:59,180 INFO L87 Difference]: Start difference. First operand 40969 states and 54279 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-20 07:28:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:28:59,373 INFO L93 Difference]: Finished difference Result 69643 states and 93192 transitions. [2022-03-20 07:28:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:28:59,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2022-03-20 07:28:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:28:59,574 INFO L225 Difference]: With dead ends: 69643 [2022-03-20 07:28:59,574 INFO L226 Difference]: Without dead ends: 69643 [2022-03-20 07:28:59,575 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:28:59,575 INFO L913 BasicCegarLoop]: 85 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:28:59,575 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:28:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69643 states. [2022-03-20 07:29:00,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69643 to 61449. [2022-03-20 07:29:00,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61449 states, 61445 states have (on average 1.283294002766702) internal successors, (78852), 61445 states have internal predecessors, (78852), 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) [2022-03-20 07:29:00,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61449 states to 61449 states and 78855 transitions. [2022-03-20 07:29:00,260 INFO L78 Accepts]: Start accepts. Automaton has 61449 states and 78855 transitions. Word has length 35 [2022-03-20 07:29:00,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:00,260 INFO L478 AbstractCegarLoop]: Abstraction has 61449 states and 78855 transitions. [2022-03-20 07:29:00,260 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-20 07:29:00,260 INFO L276 IsEmpty]: Start isEmpty. Operand 61449 states and 78855 transitions. [2022-03-20 07:29:00,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-03-20 07:29:00,293 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:29:00,293 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:00,293 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 07:29:00,293 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:29:00,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:29:00,293 INFO L85 PathProgramCache]: Analyzing trace with hash -679856172, now seen corresponding path program 1 times [2022-03-20 07:29:00,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:29:00,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679433250] [2022-03-20 07:29:00,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:29:00,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:29:00,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:00,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:29:00,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:29:00,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:29:00,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679433250] [2022-03-20 07:29:00,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679433250] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:29:00,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:29:00,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:29:00,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135156424] [2022-03-20 07:29:00,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:29:00,314 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:29:00,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:29:00,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:29:00,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:29:00,315 INFO L87 Difference]: Start difference. First operand 61449 states and 78855 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-20 07:29:00,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:29:00,700 INFO L93 Difference]: Finished difference Result 79883 states and 101384 transitions. [2022-03-20 07:29:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:29:00,700 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 35 [2022-03-20 07:29:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:29:00,794 INFO L225 Difference]: With dead ends: 79883 [2022-03-20 07:29:00,795 INFO L226 Difference]: Without dead ends: 79883 [2022-03-20 07:29:00,796 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:29:00,796 INFO L913 BasicCegarLoop]: 140 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:29:00,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 147 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:29:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79883 states. [2022-03-20 07:29:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79883 to 79881. [2022-03-20 07:29:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79881 states, 79877 states have (on average 1.2692013971481153) internal successors, (101380), 79877 states have internal predecessors, (101380), 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) [2022-03-20 07:29:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79881 states to 79881 states and 101383 transitions. [2022-03-20 07:29:01,726 INFO L78 Accepts]: Start accepts. Automaton has 79881 states and 101383 transitions. Word has length 35 [2022-03-20 07:29:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:01,726 INFO L478 AbstractCegarLoop]: Abstraction has 79881 states and 101383 transitions. [2022-03-20 07:29:01,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2022-03-20 07:29:01,726 INFO L276 IsEmpty]: Start isEmpty. Operand 79881 states and 101383 transitions. [2022-03-20 07:29:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 07:29:01,766 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:29:01,766 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:01,766 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 07:29:01,766 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:29:01,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:29:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1396400834, now seen corresponding path program 1 times [2022-03-20 07:29:01,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:29:01,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031377289] [2022-03-20 07:29:01,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:29:01,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:29:01,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:01,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:29:01,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:01,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:29:01,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:29:01,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031377289] [2022-03-20 07:29:01,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031377289] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:29:01,792 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:29:01,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:29:01,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516570535] [2022-03-20 07:29:01,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:29:01,792 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:29:01,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:29:01,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:29:01,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:29:01,792 INFO L87 Difference]: Start difference. First operand 79881 states and 101383 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-03-20 07:29:02,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:29:02,191 INFO L93 Difference]: Finished difference Result 80907 states and 101384 transitions. [2022-03-20 07:29:02,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:29:02,191 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 36 [2022-03-20 07:29:02,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:29:02,273 INFO L225 Difference]: With dead ends: 80907 [2022-03-20 07:29:02,274 INFO L226 Difference]: Without dead ends: 80907 [2022-03-20 07:29:02,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:29:02,274 INFO L913 BasicCegarLoop]: 116 mSDtfsCounter, 173 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:29:02,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 123 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:29:02,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80907 states. [2022-03-20 07:29:03,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80907 to 80905. [2022-03-20 07:29:03,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80905 states, 80901 states have (on average 1.253136549610017) internal successors, (101380), 80901 states have internal predecessors, (101380), 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) [2022-03-20 07:29:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80905 states to 80905 states and 101383 transitions. [2022-03-20 07:29:03,234 INFO L78 Accepts]: Start accepts. Automaton has 80905 states and 101383 transitions. Word has length 36 [2022-03-20 07:29:03,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:03,234 INFO L478 AbstractCegarLoop]: Abstraction has 80905 states and 101383 transitions. [2022-03-20 07:29:03,234 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-03-20 07:29:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 80905 states and 101383 transitions. [2022-03-20 07:29:03,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 07:29:03,438 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:29:03,438 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:03,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 07:29:03,438 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:29:03,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:29:03,438 INFO L85 PathProgramCache]: Analyzing trace with hash 399328481, now seen corresponding path program 1 times [2022-03-20 07:29:03,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:29:03,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345488677] [2022-03-20 07:29:03,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:29:03,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:29:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:03,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:29:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:03,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:29:03,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:29:03,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345488677] [2022-03-20 07:29:03,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345488677] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:29:03,498 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:29:03,498 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:29:03,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924563799] [2022-03-20 07:29:03,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:29:03,499 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:29:03,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:29:03,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:29:03,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:29:03,500 INFO L87 Difference]: Start difference. First operand 80905 states and 101383 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-03-20 07:29:03,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:29:03,820 INFO L93 Difference]: Finished difference Result 135179 states and 169992 transitions. [2022-03-20 07:29:03,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:29:03,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 36 [2022-03-20 07:29:03,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:29:03,994 INFO L225 Difference]: With dead ends: 135179 [2022-03-20 07:29:03,994 INFO L226 Difference]: Without dead ends: 135179 [2022-03-20 07:29:03,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:29:03,995 INFO L913 BasicCegarLoop]: 84 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:29:03,995 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 91 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:29:04,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135179 states. [2022-03-20 07:29:05,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135179 to 122889. [2022-03-20 07:29:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122889 states, 122885 states have (on average 1.2166497131464378) internal successors, (149508), 122885 states have internal predecessors, (149508), 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) [2022-03-20 07:29:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122889 states to 122889 states and 149511 transitions. [2022-03-20 07:29:05,729 INFO L78 Accepts]: Start accepts. Automaton has 122889 states and 149511 transitions. Word has length 36 [2022-03-20 07:29:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:05,730 INFO L478 AbstractCegarLoop]: Abstraction has 122889 states and 149511 transitions. [2022-03-20 07:29:05,730 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-03-20 07:29:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 122889 states and 149511 transitions. [2022-03-20 07:29:05,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 07:29:05,793 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:29:05,794 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:05,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 07:29:05,794 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:29:05,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:29:05,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1752638178, now seen corresponding path program 1 times [2022-03-20 07:29:05,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:29:05,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58262443] [2022-03-20 07:29:05,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:29:05,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:29:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:05,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:29:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:29:05,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:29:05,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58262443] [2022-03-20 07:29:05,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58262443] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:29:05,815 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:29:05,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:29:05,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388816451] [2022-03-20 07:29:05,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:29:05,816 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:29:05,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:29:05,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:29:05,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:29:05,816 INFO L87 Difference]: Start difference. First operand 122889 states and 149511 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-03-20 07:29:06,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:29:06,423 INFO L93 Difference]: Finished difference Result 157707 states and 188424 transitions. [2022-03-20 07:29:06,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:29:06,423 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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 36 [2022-03-20 07:29:06,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:29:06,609 INFO L225 Difference]: With dead ends: 157707 [2022-03-20 07:29:06,609 INFO L226 Difference]: Without dead ends: 157707 [2022-03-20 07:29:06,610 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:29:06,610 INFO L913 BasicCegarLoop]: 142 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:29:06,610 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 149 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:29:06,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157707 states. [2022-03-20 07:29:08,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157707 to 157705. [2022-03-20 07:29:08,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157705 states, 157701 states have (on average 1.1947926772816913) internal successors, (188420), 157701 states have internal predecessors, (188420), 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) [2022-03-20 07:29:08,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157705 states to 157705 states and 188423 transitions. [2022-03-20 07:29:08,754 INFO L78 Accepts]: Start accepts. Automaton has 157705 states and 188423 transitions. Word has length 36 [2022-03-20 07:29:08,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:08,756 INFO L478 AbstractCegarLoop]: Abstraction has 157705 states and 188423 transitions. [2022-03-20 07:29:08,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 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) [2022-03-20 07:29:08,756 INFO L276 IsEmpty]: Start isEmpty. Operand 157705 states and 188423 transitions. [2022-03-20 07:29:08,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 07:29:08,856 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:29:08,856 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:08,856 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 07:29:08,856 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:29:08,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:29:08,856 INFO L85 PathProgramCache]: Analyzing trace with hash -505685520, now seen corresponding path program 1 times [2022-03-20 07:29:08,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:29:08,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005936482] [2022-03-20 07:29:08,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:29:08,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:29:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:08,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:29:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:08,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:29:08,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:29:08,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005936482] [2022-03-20 07:29:08,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005936482] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:29:08,876 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:29:08,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:29:08,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178152139] [2022-03-20 07:29:08,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:29:08,876 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:29:08,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:29:08,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:29:08,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:29:08,877 INFO L87 Difference]: Start difference. First operand 157705 states and 188423 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-20 07:29:09,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:29:09,589 INFO L93 Difference]: Finished difference Result 159755 states and 188424 transitions. [2022-03-20 07:29:09,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:29:09,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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 37 [2022-03-20 07:29:09,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:29:09,764 INFO L225 Difference]: With dead ends: 159755 [2022-03-20 07:29:09,765 INFO L226 Difference]: Without dead ends: 159755 [2022-03-20 07:29:09,766 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:29:09,766 INFO L913 BasicCegarLoop]: 113 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:29:09,767 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 120 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:29:09,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159755 states. [2022-03-20 07:29:11,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159755 to 159753. [2022-03-20 07:29:11,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159753 states, 159749 states have (on average 1.179475301879824) internal successors, (188420), 159749 states have internal predecessors, (188420), 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) [2022-03-20 07:29:11,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159753 states to 159753 states and 188423 transitions. [2022-03-20 07:29:11,615 INFO L78 Accepts]: Start accepts. Automaton has 159753 states and 188423 transitions. Word has length 37 [2022-03-20 07:29:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:11,615 INFO L478 AbstractCegarLoop]: Abstraction has 159753 states and 188423 transitions. [2022-03-20 07:29:11,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-20 07:29:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 159753 states and 188423 transitions. [2022-03-20 07:29:11,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 07:29:11,714 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:29:11,714 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:11,714 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 07:29:11,714 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:29:11,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:29:11,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1502757873, now seen corresponding path program 1 times [2022-03-20 07:29:11,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:29:11,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626886353] [2022-03-20 07:29:11,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:29:11,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:29:11,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:11,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:29:11,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:11,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:29:11,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:29:11,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626886353] [2022-03-20 07:29:11,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626886353] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:29:11,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:29:11,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:29:11,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470948305] [2022-03-20 07:29:11,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:29:11,751 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:29:11,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:29:11,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:29:11,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:29:11,751 INFO L87 Difference]: Start difference. First operand 159753 states and 188423 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-20 07:29:12,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:29:12,848 INFO L93 Difference]: Finished difference Result 262155 states and 307208 transitions. [2022-03-20 07:29:12,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:29:12,848 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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 37 [2022-03-20 07:29:12,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:29:13,467 INFO L225 Difference]: With dead ends: 262155 [2022-03-20 07:29:13,468 INFO L226 Difference]: Without dead ends: 262155 [2022-03-20 07:29:13,468 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:29:13,468 INFO L913 BasicCegarLoop]: 83 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:29:13,468 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 90 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:29:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262155 states. [2022-03-20 07:29:15,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262155 to 245769. [2022-03-20 07:29:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245769 states, 245765 states have (on average 1.1499928793766403) internal successors, (282628), 245765 states have internal predecessors, (282628), 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) [2022-03-20 07:29:16,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245769 states to 245769 states and 282631 transitions. [2022-03-20 07:29:16,511 INFO L78 Accepts]: Start accepts. Automaton has 245769 states and 282631 transitions. Word has length 37 [2022-03-20 07:29:16,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:16,512 INFO L478 AbstractCegarLoop]: Abstraction has 245769 states and 282631 transitions. [2022-03-20 07:29:16,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-20 07:29:16,512 INFO L276 IsEmpty]: Start isEmpty. Operand 245769 states and 282631 transitions. [2022-03-20 07:29:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-20 07:29:16,712 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:29:16,712 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:16,713 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 07:29:16,713 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:29:16,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:29:16,713 INFO L85 PathProgramCache]: Analyzing trace with hash -149448176, now seen corresponding path program 1 times [2022-03-20 07:29:16,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:29:16,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016743158] [2022-03-20 07:29:16,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:29:16,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:29:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:16,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:29:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:16,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:29:16,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:29:16,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016743158] [2022-03-20 07:29:16,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016743158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:29:16,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:29:16,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:29:16,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653541839] [2022-03-20 07:29:16,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:29:16,733 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:29:16,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:29:16,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:29:16,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:29:16,733 INFO L87 Difference]: Start difference. First operand 245769 states and 282631 transitions. Second operand has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-20 07:29:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:29:17,667 INFO L93 Difference]: Finished difference Result 311307 states and 348168 transitions. [2022-03-20 07:29:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:29:17,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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 37 [2022-03-20 07:29:17,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:29:18,106 INFO L225 Difference]: With dead ends: 311307 [2022-03-20 07:29:18,106 INFO L226 Difference]: Without dead ends: 311307 [2022-03-20 07:29:18,106 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:29:18,106 INFO L913 BasicCegarLoop]: 144 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:29:18,107 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 151 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:29:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311307 states. [2022-03-20 07:29:20,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311307 to 311305. [2022-03-20 07:29:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311305 states, 311301 states have (on average 1.1184159382719618) internal successors, (348164), 311301 states have internal predecessors, (348164), 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) [2022-03-20 07:29:22,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311305 states to 311305 states and 348167 transitions. [2022-03-20 07:29:22,169 INFO L78 Accepts]: Start accepts. Automaton has 311305 states and 348167 transitions. Word has length 37 [2022-03-20 07:29:22,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:22,169 INFO L478 AbstractCegarLoop]: Abstraction has 311305 states and 348167 transitions. [2022-03-20 07:29:22,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.5) internal successors, (34), 3 states have internal predecessors, (34), 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) [2022-03-20 07:29:22,169 INFO L276 IsEmpty]: Start isEmpty. Operand 311305 states and 348167 transitions. [2022-03-20 07:29:22,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 07:29:22,395 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:29:22,395 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:22,396 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 07:29:22,396 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:29:22,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:29:22,396 INFO L85 PathProgramCache]: Analyzing trace with hash 659179774, now seen corresponding path program 1 times [2022-03-20 07:29:22,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:29:22,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189190130] [2022-03-20 07:29:22,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:29:22,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:29:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:22,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:29:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:29:22,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:29:22,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189190130] [2022-03-20 07:29:22,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189190130] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:29:22,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:29:22,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:29:22,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797959165] [2022-03-20 07:29:22,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:29:22,457 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:29:22,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:29:22,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:29:22,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:29:22,457 INFO L87 Difference]: Start difference. First operand 311305 states and 348167 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-20 07:29:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:29:23,948 INFO L93 Difference]: Finished difference Result 315403 states and 348168 transitions. [2022-03-20 07:29:24,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:29:24,255 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2022-03-20 07:29:24,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:29:24,758 INFO L225 Difference]: With dead ends: 315403 [2022-03-20 07:29:24,758 INFO L226 Difference]: Without dead ends: 315403 [2022-03-20 07:29:24,763 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:29:24,764 INFO L913 BasicCegarLoop]: 110 mSDtfsCounter, 171 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:29:24,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 117 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:29:24,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315403 states. [2022-03-20 07:29:27,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315403 to 315401. [2022-03-20 07:29:27,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315401 states, 315397 states have (on average 1.1038912862202241) internal successors, (348164), 315397 states have internal predecessors, (348164), 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) [2022-03-20 07:29:28,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315401 states to 315401 states and 348167 transitions. [2022-03-20 07:29:28,220 INFO L78 Accepts]: Start accepts. Automaton has 315401 states and 348167 transitions. Word has length 38 [2022-03-20 07:29:28,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:28,221 INFO L478 AbstractCegarLoop]: Abstraction has 315401 states and 348167 transitions. [2022-03-20 07:29:28,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-20 07:29:28,221 INFO L276 IsEmpty]: Start isEmpty. Operand 315401 states and 348167 transitions. [2022-03-20 07:29:28,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 07:29:28,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:29:28,436 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:28,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 07:29:28,436 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:29:28,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:29:28,436 INFO L85 PathProgramCache]: Analyzing trace with hash -337892579, now seen corresponding path program 1 times [2022-03-20 07:29:28,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:29:28,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369776952] [2022-03-20 07:29:28,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:29:28,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:29:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:28,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:29:28,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:28,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:29:28,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:29:28,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369776952] [2022-03-20 07:29:28,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369776952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:29:28,454 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:29:28,454 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:29:28,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832820862] [2022-03-20 07:29:28,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:29:28,454 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:29:28,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:29:28,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:29:28,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:29:28,455 INFO L87 Difference]: Start difference. First operand 315401 states and 348167 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-20 07:29:30,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:29:30,122 INFO L93 Difference]: Finished difference Result 507913 states and 548871 transitions. [2022-03-20 07:29:30,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:29:30,123 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2022-03-20 07:29:30,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:29:30,921 INFO L225 Difference]: With dead ends: 507913 [2022-03-20 07:29:30,921 INFO L226 Difference]: Without dead ends: 507913 [2022-03-20 07:29:30,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:29:30,921 INFO L913 BasicCegarLoop]: 81 mSDtfsCounter, 144 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:29:30,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 88 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:29:31,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507913 states. [2022-03-20 07:29:35,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507913 to 491529. [2022-03-20 07:29:35,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491529 states, 491525 states have (on average 1.0833304511469406) internal successors, (532484), 491525 states have internal predecessors, (532484), 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) [2022-03-20 07:29:37,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491529 states to 491529 states and 532487 transitions. [2022-03-20 07:29:37,351 INFO L78 Accepts]: Start accepts. Automaton has 491529 states and 532487 transitions. Word has length 38 [2022-03-20 07:29:37,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:37,351 INFO L478 AbstractCegarLoop]: Abstraction has 491529 states and 532487 transitions. [2022-03-20 07:29:37,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-20 07:29:37,351 INFO L276 IsEmpty]: Start isEmpty. Operand 491529 states and 532487 transitions. [2022-03-20 07:29:37,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 07:29:37,753 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 07:29:37,754 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:37,754 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 07:29:37,754 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 07:29:37,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 07:29:37,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1015417118, now seen corresponding path program 1 times [2022-03-20 07:29:37,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 07:29:37,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843617938] [2022-03-20 07:29:37,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 07:29:37,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 07:29:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:37,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 07:29:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 07:29:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 07:29:37,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 07:29:37,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843617938] [2022-03-20 07:29:37,780 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843617938] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 07:29:37,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 07:29:37,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-20 07:29:37,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859842336] [2022-03-20 07:29:37,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 07:29:37,781 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-20 07:29:37,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 07:29:37,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-20 07:29:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-20 07:29:37,781 INFO L87 Difference]: Start difference. First operand 491529 states and 532487 transitions. Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-20 07:29:39,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 07:29:39,830 INFO L93 Difference]: Finished difference Result 614407 states and 638982 transitions. [2022-03-20 07:29:39,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 07:29:39,831 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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 38 [2022-03-20 07:29:39,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 07:29:39,831 INFO L225 Difference]: With dead ends: 614407 [2022-03-20 07:29:39,831 INFO L226 Difference]: Without dead ends: 0 [2022-03-20 07:29:39,831 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-20 07:29:39,832 INFO L913 BasicCegarLoop]: 145 mSDtfsCounter, 127 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 07:29:39,832 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 152 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 07:29:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-03-20 07:29:39,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-03-20 07:29:39,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-20 07:29:39,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-03-20 07:29:39,837 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2022-03-20 07:29:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 07:29:39,837 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-03-20 07:29:39,837 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 3 states have internal predecessors, (35), 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) [2022-03-20 07:29:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-03-20 07:29:39,837 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-03-20 07:29:39,840 INFO L788 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-03-20 07:29:39,841 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 07:29:39,852 INFO L719 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 07:29:39,853 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-20 07:29:39,855 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.03 07:29:39 BasicIcfg [2022-03-20 07:29:39,855 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-20 07:29:39,855 INFO L158 Benchmark]: Toolchain (without parser) took 49385.51ms. Allocated memory was 184.5MB in the beginning and 8.0GB in the end (delta: 7.8GB). Free memory was 127.4MB in the beginning and 3.8GB in the end (delta: -3.7GB). Peak memory consumption was 4.1GB. Max. memory is 8.0GB. [2022-03-20 07:29:39,856 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 143.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-20 07:29:39,856 INFO L158 Benchmark]: CACSL2BoogieTranslator took 225.02ms. Allocated memory was 184.5MB in the beginning and 283.1MB in the end (delta: 98.6MB). Free memory was 127.1MB in the beginning and 254.0MB in the end (delta: -126.9MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. [2022-03-20 07:29:39,856 INFO L158 Benchmark]: Boogie Preprocessor took 23.13ms. Allocated memory is still 283.1MB. Free memory was 254.0MB in the beginning and 252.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-20 07:29:39,856 INFO L158 Benchmark]: RCFGBuilder took 408.67ms. Allocated memory is still 283.1MB. Free memory was 252.4MB in the beginning and 237.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. [2022-03-20 07:29:39,856 INFO L158 Benchmark]: IcfgTransformer took 32.21ms. Allocated memory is still 283.1MB. Free memory was 237.7MB in the beginning and 236.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-03-20 07:29:39,856 INFO L158 Benchmark]: TraceAbstraction took 48690.89ms. Allocated memory was 283.1MB in the beginning and 8.0GB in the end (delta: 7.7GB). Free memory was 235.6MB in the beginning and 3.8GB in the end (delta: -3.6GB). Peak memory consumption was 4.1GB. Max. memory is 8.0GB. [2022-03-20 07:29:39,857 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 184.5MB. Free memory is still 143.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 225.02ms. Allocated memory was 184.5MB in the beginning and 283.1MB in the end (delta: 98.6MB). Free memory was 127.1MB in the beginning and 254.0MB in the end (delta: -126.9MB). Peak memory consumption was 10.3MB. Max. memory is 8.0GB. * Boogie Preprocessor took 23.13ms. Allocated memory is still 283.1MB. Free memory was 254.0MB in the beginning and 252.4MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 408.67ms. Allocated memory is still 283.1MB. Free memory was 252.4MB in the beginning and 237.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 8.0GB. * IcfgTransformer took 32.21ms. Allocated memory is still 283.1MB. Free memory was 237.7MB in the beginning and 236.2MB in the end (delta: 1.6MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 48690.89ms. Allocated memory was 283.1MB in the beginning and 8.0GB in the end (delta: 7.7GB). Free memory was 235.6MB in the beginning and 3.8GB in the end (delta: -3.6GB). Peak memory consumption was 4.1GB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 219]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 57 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 48.6s, OverallIterations: 41, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 1.8s, AutomataDifference: 16.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7336 SdHoareTripleChecker+Valid, 2.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 7336 mSDsluCounter, 5061 SdHoareTripleChecker+Invalid, 2.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 289 mSDsCounter, 96 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3369 IncrementalHoareTripleChecker+Invalid, 3465 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 96 mSolverCounterUnsat, 4772 mSDtfsCounter, 3369 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 287 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=491529occurred in iteration=40, InterpolantAutomatonStates: 164, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 28.6s AutomataMinimizationTime, 41 MinimizatonAttempts, 65582 StatesRemovedByMinimization, 40 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 1298 NumberOfCodeBlocks, 1298 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1257 ConstructedInterpolants, 0 QuantifiedInterpolants, 2861 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 41 InterpolantComputations, 41 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-03-20 07:29:39,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...