/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_12.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 19:55:09,246 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 19:55:09,248 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 19:55:09,268 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-23 19:55:09,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-23 19:55:09,310 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 19:55:09,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 19:55:09,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 19:55:09,312 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-23 19:55:09,312 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 19:55:09,312 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-23 19:55:09,312 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 19:55:09,312 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 19:55:09,312 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 19:55:09,312 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 19:55:09,313 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-23 19:55:09,313 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 19:55:09,313 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 19:55:09,313 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 19:55:09,313 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 19:55:09,313 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 19:55:09,313 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-23 19:55:09,313 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 19:55:09,313 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:55:09,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 19:55:09,314 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 19:55:09,314 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 19:55:09,314 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 19:55:09,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 19:55:09,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 19:55:09,511 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 19:55:09,512 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 19:55:09,513 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 19:55:09,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_12.c [2022-02-23 19:55:09,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4882a1635/6627a43ffab14677b459f71bd408e976/FLAGd5b789534 [2022-02-23 19:55:09,939 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 19:55:09,939 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/locks/test_locks_12.c [2022-02-23 19:55:09,946 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4882a1635/6627a43ffab14677b459f71bd408e976/FLAGd5b789534 [2022-02-23 19:55:09,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4882a1635/6627a43ffab14677b459f71bd408e976 [2022-02-23 19:55:09,965 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 19:55:09,967 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 19:55:09,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 19:55:09,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 19:55:09,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 19:55:09,973 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:55:09" (1/1) ... [2022-02-23 19:55:09,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d2812f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:09, skipping insertion in model container [2022-02-23 19:55:09,975 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 07:55:09" (1/1) ... [2022-02-23 19:55:09,980 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 19:55:10,005 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 19:55:10,150 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_12.c[4591,4604] [2022-02-23 19:55:10,153 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:55:10,158 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 19:55:10,179 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_12.c[4591,4604] [2022-02-23 19:55:10,180 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 19:55:10,191 INFO L208 MainTranslator]: Completed translation [2022-02-23 19:55:10,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:10 WrapperNode [2022-02-23 19:55:10,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 19:55:10,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 19:55:10,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 19:55:10,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 19:55:10,200 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:10" (1/1) ... [2022-02-23 19:55:10,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:10" (1/1) ... [2022-02-23 19:55:10,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:10" (1/1) ... [2022-02-23 19:55:10,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:10" (1/1) ... [2022-02-23 19:55:10,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:10" (1/1) ... [2022-02-23 19:55:10,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:10" (1/1) ... [2022-02-23 19:55:10,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:10" (1/1) ... [2022-02-23 19:55:10,215 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 19:55:10,215 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 19:55:10,216 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 19:55:10,216 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 19:55:10,216 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:10" (1/1) ... [2022-02-23 19:55:10,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 19:55:10,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 19:55:10,265 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) [2022-02-23 19:55:10,274 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 [2022-02-23 19:55:10,297 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 19:55:10,298 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 19:55:10,298 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 19:55:10,298 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 19:55:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 19:55:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 19:55:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 19:55:10,298 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 19:55:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 19:55:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 19:55:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 19:55:10,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 19:55:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 19:55:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 19:55:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 19:55:10,300 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 19:55:10,365 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 19:55:10,366 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 19:55:10,531 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 19:55:10,538 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 19:55:10,538 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 19:55:10,539 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:55:10 BoogieIcfgContainer [2022-02-23 19:55:10,539 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 19:55:10,540 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 19:55:10,540 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 19:55:10,545 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 19:55:10,548 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:55:10" (1/1) ... [2022-02-23 19:55:10,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:55:10 BasicIcfg [2022-02-23 19:55:10,570 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 19:55:10,571 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 19:55:10,571 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 19:55:10,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 19:55:10,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 07:55:09" (1/4) ... [2022-02-23 19:55:10,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396c08c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:55:10, skipping insertion in model container [2022-02-23 19:55:10,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 07:55:10" (2/4) ... [2022-02-23 19:55:10,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396c08c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 07:55:10, skipping insertion in model container [2022-02-23 19:55:10,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 07:55:10" (3/4) ... [2022-02-23 19:55:10,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@396c08c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:55:10, skipping insertion in model container [2022-02-23 19:55:10,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 07:55:10" (4/4) ... [2022-02-23 19:55:10,575 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_12.cJordan [2022-02-23 19:55:10,578 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-23 19:55:10,579 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 19:55:10,609 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 19:55:10,619 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-02-23 19:55:10,619 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 19:55:10,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 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) [2022-02-23 19:55:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 19:55:10,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:10,634 INFO L514 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] [2022-02-23 19:55:10,635 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:10,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:10,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1823990193, now seen corresponding path program 1 times [2022-02-23 19:55:10,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:10,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405506603] [2022-02-23 19:55:10,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:10,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:10,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:10,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:10,820 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:10,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405506603] [2022-02-23 19:55:10,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405506603] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:10,821 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:10,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:10,822 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266132775] [2022-02-23 19:55:10,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:10,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:10,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:10,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:10,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:10,855 INFO L87 Difference]: Start difference. First operand has 51 states, 45 states have (on average 1.8888888888888888) internal successors, (85), 46 states have internal predecessors, (85), 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 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-02-23 19:55:11,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:11,021 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2022-02-23 19:55:11,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:11,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-02-23 19:55:11,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:11,034 INFO L225 Difference]: With dead ends: 93 [2022-02-23 19:55:11,034 INFO L226 Difference]: Without dead ends: 85 [2022-02-23 19:55:11,036 INFO L932 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 [2022-02-23 19:55:11,041 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 208 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 101 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 [2022-02-23 19:55:11,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 101 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:11,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-23 19:55:11,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2022-02-23 19:55:11,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 55 states have (on average 1.8727272727272728) internal successors, (103), 55 states have internal predecessors, (103), 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) [2022-02-23 19:55:11,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 106 transitions. [2022-02-23 19:55:11,077 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 106 transitions. Word has length 23 [2022-02-23 19:55:11,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:11,078 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 106 transitions. [2022-02-23 19:55:11,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-02-23 19:55:11,078 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 106 transitions. [2022-02-23 19:55:11,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-23 19:55:11,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:11,080 INFO L514 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] [2022-02-23 19:55:11,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 19:55:11,081 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:11,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:11,084 INFO L85 PathProgramCache]: Analyzing trace with hash -316438384, now seen corresponding path program 1 times [2022-02-23 19:55:11,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:11,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359214605] [2022-02-23 19:55:11,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:11,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:11,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:11,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:11,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:11,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359214605] [2022-02-23 19:55:11,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359214605] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:11,169 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:11,169 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:11,169 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983975676] [2022-02-23 19:55:11,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:11,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:11,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:11,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:11,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:11,171 INFO L87 Difference]: Start difference. First operand 59 states and 106 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-02-23 19:55:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:11,250 INFO L93 Difference]: Finished difference Result 85 states and 151 transitions. [2022-02-23 19:55:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:11,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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 23 [2022-02-23 19:55:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:11,254 INFO L225 Difference]: With dead ends: 85 [2022-02-23 19:55:11,254 INFO L226 Difference]: Without dead ends: 85 [2022-02-23 19:55:11,257 INFO L932 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 [2022-02-23 19:55:11,258 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 178 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 111 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 [2022-02-23 19:55:11,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 111 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:11,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-23 19:55:11,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2022-02-23 19:55:11,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 79 states have (on average 1.860759493670886) internal successors, (147), 79 states have internal predecessors, (147), 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) [2022-02-23 19:55:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 150 transitions. [2022-02-23 19:55:11,269 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 150 transitions. Word has length 23 [2022-02-23 19:55:11,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:11,269 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 150 transitions. [2022-02-23 19:55:11,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-02-23 19:55:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 150 transitions. [2022-02-23 19:55:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 19:55:11,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:11,271 INFO L514 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] [2022-02-23 19:55:11,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-23 19:55:11,271 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:11,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:11,272 INFO L85 PathProgramCache]: Analyzing trace with hash -709089080, now seen corresponding path program 1 times [2022-02-23 19:55:11,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:11,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941854680] [2022-02-23 19:55:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:11,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:11,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:11,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:11,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:11,370 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:11,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941854680] [2022-02-23 19:55:11,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941854680] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:11,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:11,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:11,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227529996] [2022-02-23 19:55:11,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:11,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:11,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:11,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:11,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:11,372 INFO L87 Difference]: Start difference. First operand 83 states and 150 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-23 19:55:11,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:11,464 INFO L93 Difference]: Finished difference Result 88 states and 153 transitions. [2022-02-23 19:55:11,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:11,465 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-02-23 19:55:11,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:11,467 INFO L225 Difference]: With dead ends: 88 [2022-02-23 19:55:11,467 INFO L226 Difference]: Without dead ends: 88 [2022-02-23 19:55:11,470 INFO L932 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 [2022-02-23 19:55:11,473 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 157 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 133 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 [2022-02-23 19:55:11,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 133 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:11,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-23 19:55:11,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2022-02-23 19:55:11,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.8170731707317074) internal successors, (149), 82 states have internal predecessors, (149), 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) [2022-02-23 19:55:11,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 152 transitions. [2022-02-23 19:55:11,481 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 152 transitions. Word has length 24 [2022-02-23 19:55:11,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:11,481 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 152 transitions. [2022-02-23 19:55:11,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-23 19:55:11,481 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 152 transitions. [2022-02-23 19:55:11,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 19:55:11,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:11,482 INFO L514 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] [2022-02-23 19:55:11,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-23 19:55:11,482 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:11,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:11,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1219623257, now seen corresponding path program 1 times [2022-02-23 19:55:11,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:11,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066208930] [2022-02-23 19:55:11,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:11,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:11,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:11,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:11,553 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:11,553 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066208930] [2022-02-23 19:55:11,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066208930] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:11,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:11,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:11,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085445505] [2022-02-23 19:55:11,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:11,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:11,554 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:11,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:11,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:11,555 INFO L87 Difference]: Start difference. First operand 86 states and 152 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-23 19:55:11,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:11,648 INFO L93 Difference]: Finished difference Result 159 states and 286 transitions. [2022-02-23 19:55:11,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:11,649 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-02-23 19:55:11,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:11,650 INFO L225 Difference]: With dead ends: 159 [2022-02-23 19:55:11,650 INFO L226 Difference]: Without dead ends: 159 [2022-02-23 19:55:11,650 INFO L932 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 [2022-02-23 19:55:11,655 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 195 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 89 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 [2022-02-23 19:55:11,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [195 Valid, 89 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-02-23 19:55:11,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 113. [2022-02-23 19:55:11,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 109 states have (on average 1.81651376146789) internal successors, (198), 109 states have internal predecessors, (198), 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) [2022-02-23 19:55:11,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 201 transitions. [2022-02-23 19:55:11,671 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 201 transitions. Word has length 24 [2022-02-23 19:55:11,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:11,671 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 201 transitions. [2022-02-23 19:55:11,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-23 19:55:11,671 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 201 transitions. [2022-02-23 19:55:11,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 19:55:11,672 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:11,672 INFO L514 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] [2022-02-23 19:55:11,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-23 19:55:11,672 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash 287928552, now seen corresponding path program 1 times [2022-02-23 19:55:11,673 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:11,673 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375150253] [2022-02-23 19:55:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:11,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:11,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:11,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:11,747 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:11,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375150253] [2022-02-23 19:55:11,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375150253] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:11,747 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:11,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:11,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264947612] [2022-02-23 19:55:11,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:11,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:11,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:11,748 INFO L87 Difference]: Start difference. First operand 113 states and 201 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-23 19:55:11,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:11,821 INFO L93 Difference]: Finished difference Result 161 states and 284 transitions. [2022-02-23 19:55:11,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:11,822 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 24 [2022-02-23 19:55:11,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:11,823 INFO L225 Difference]: With dead ends: 161 [2022-02-23 19:55:11,823 INFO L226 Difference]: Without dead ends: 161 [2022-02-23 19:55:11,823 INFO L932 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 [2022-02-23 19:55:11,823 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 172 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:11,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 113 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:11,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-02-23 19:55:11,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 159. [2022-02-23 19:55:11,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 155 states have (on average 1.8064516129032258) internal successors, (280), 155 states have internal predecessors, (280), 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) [2022-02-23 19:55:11,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 283 transitions. [2022-02-23 19:55:11,828 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 283 transitions. Word has length 24 [2022-02-23 19:55:11,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:11,829 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 283 transitions. [2022-02-23 19:55:11,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2022-02-23 19:55:11,829 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 283 transitions. [2022-02-23 19:55:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 19:55:11,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:11,829 INFO L514 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] [2022-02-23 19:55:11,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-23 19:55:11,830 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:11,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:11,830 INFO L85 PathProgramCache]: Analyzing trace with hash 846416876, now seen corresponding path program 1 times [2022-02-23 19:55:11,830 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:11,830 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322213801] [2022-02-23 19:55:11,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:11,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:11,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:11,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:11,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:11,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322213801] [2022-02-23 19:55:11,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322213801] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:11,887 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:11,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:11,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121079735] [2022-02-23 19:55:11,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:11,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:11,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:11,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:11,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:11,889 INFO L87 Difference]: Start difference. First operand 159 states and 283 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) [2022-02-23 19:55:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:11,956 INFO L93 Difference]: Finished difference Result 163 states and 284 transitions. [2022-02-23 19:55:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:11,956 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 [2022-02-23 19:55:11,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:11,958 INFO L225 Difference]: With dead ends: 163 [2022-02-23 19:55:11,958 INFO L226 Difference]: Without dead ends: 163 [2022-02-23 19:55:11,959 INFO L932 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 [2022-02-23 19:55:11,960 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 156 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:11,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 130 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-02-23 19:55:11,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2022-02-23 19:55:11,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 157 states have (on average 1.78343949044586) internal successors, (280), 157 states have internal predecessors, (280), 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) [2022-02-23 19:55:11,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 283 transitions. [2022-02-23 19:55:11,977 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 283 transitions. Word has length 25 [2022-02-23 19:55:11,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:11,978 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 283 transitions. [2022-02-23 19:55:11,978 INFO L471 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) [2022-02-23 19:55:11,978 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 283 transitions. [2022-02-23 19:55:11,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 19:55:11,979 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:11,979 INFO L514 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] [2022-02-23 19:55:11,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-23 19:55:11,979 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:11,979 INFO L85 PathProgramCache]: Analyzing trace with hash 335882699, now seen corresponding path program 1 times [2022-02-23 19:55:11,979 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:11,980 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984341837] [2022-02-23 19:55:11,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:11,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:11,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:12,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:12,014 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:12,014 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984341837] [2022-02-23 19:55:12,014 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984341837] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:12,014 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:12,014 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:12,015 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43415337] [2022-02-23 19:55:12,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:12,015 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:12,015 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:12,016 INFO L87 Difference]: Start difference. First operand 161 states and 283 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) [2022-02-23 19:55:12,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:12,096 INFO L93 Difference]: Finished difference Result 299 states and 532 transitions. [2022-02-23 19:55:12,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:12,097 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 [2022-02-23 19:55:12,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:12,098 INFO L225 Difference]: With dead ends: 299 [2022-02-23 19:55:12,098 INFO L226 Difference]: Without dead ends: 299 [2022-02-23 19:55:12,098 INFO L932 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 [2022-02-23 19:55:12,099 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 188 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 88 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 [2022-02-23 19:55:12,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 88 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:12,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-02-23 19:55:12,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 217. [2022-02-23 19:55:12,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 213 states have (on average 1.7652582159624413) internal successors, (376), 213 states have internal predecessors, (376), 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) [2022-02-23 19:55:12,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 379 transitions. [2022-02-23 19:55:12,105 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 379 transitions. Word has length 25 [2022-02-23 19:55:12,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:12,105 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 379 transitions. [2022-02-23 19:55:12,105 INFO L471 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) [2022-02-23 19:55:12,105 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 379 transitions. [2022-02-23 19:55:12,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-23 19:55:12,106 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:12,106 INFO L514 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] [2022-02-23 19:55:12,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-23 19:55:12,106 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:12,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:12,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1843434508, now seen corresponding path program 1 times [2022-02-23 19:55:12,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:12,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389252183] [2022-02-23 19:55:12,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:12,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:12,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:12,132 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:12,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389252183] [2022-02-23 19:55:12,133 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389252183] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:12,133 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:12,133 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:12,133 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865104369] [2022-02-23 19:55:12,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:12,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:12,133 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:12,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:12,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:12,134 INFO L87 Difference]: Start difference. First operand 217 states and 379 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) [2022-02-23 19:55:12,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:12,201 INFO L93 Difference]: Finished difference Result 307 states and 532 transitions. [2022-02-23 19:55:12,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:12,202 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 [2022-02-23 19:55:12,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:12,203 INFO L225 Difference]: With dead ends: 307 [2022-02-23 19:55:12,203 INFO L226 Difference]: Without dead ends: 307 [2022-02-23 19:55:12,203 INFO L932 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 [2022-02-23 19:55:12,204 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 166 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 115 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 [2022-02-23 19:55:12,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 115 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-02-23 19:55:12,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 305. [2022-02-23 19:55:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 301 states have (on average 1.7541528239202657) internal successors, (528), 301 states have internal predecessors, (528), 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) [2022-02-23 19:55:12,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 531 transitions. [2022-02-23 19:55:12,210 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 531 transitions. Word has length 25 [2022-02-23 19:55:12,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:12,210 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 531 transitions. [2022-02-23 19:55:12,210 INFO L471 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) [2022-02-23 19:55:12,210 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 531 transitions. [2022-02-23 19:55:12,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 19:55:12,211 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:12,211 INFO L514 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] [2022-02-23 19:55:12,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-23 19:55:12,211 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:12,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:12,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1822461380, now seen corresponding path program 1 times [2022-02-23 19:55:12,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:12,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875107765] [2022-02-23 19:55:12,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:12,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:12,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:12,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875107765] [2022-02-23 19:55:12,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875107765] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:12,239 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:12,239 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:12,239 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242682940] [2022-02-23 19:55:12,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:12,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:12,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:12,240 INFO L87 Difference]: Start difference. First operand 305 states and 531 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) [2022-02-23 19:55:12,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:12,309 INFO L93 Difference]: Finished difference Result 311 states and 532 transitions. [2022-02-23 19:55:12,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:12,309 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 [2022-02-23 19:55:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:12,310 INFO L225 Difference]: With dead ends: 311 [2022-02-23 19:55:12,310 INFO L226 Difference]: Without dead ends: 311 [2022-02-23 19:55:12,311 INFO L932 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 [2022-02-23 19:55:12,311 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 155 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:12,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 127 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:12,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-23 19:55:12,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 309. [2022-02-23 19:55:12,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 309 states, 305 states have (on average 1.7311475409836066) internal successors, (528), 305 states have internal predecessors, (528), 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) [2022-02-23 19:55:12,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 309 states to 309 states and 531 transitions. [2022-02-23 19:55:12,316 INFO L78 Accepts]: Start accepts. Automaton has 309 states and 531 transitions. Word has length 26 [2022-02-23 19:55:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:12,316 INFO L470 AbstractCegarLoop]: Abstraction has 309 states and 531 transitions. [2022-02-23 19:55:12,317 INFO L471 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) [2022-02-23 19:55:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 309 states and 531 transitions. [2022-02-23 19:55:12,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 19:55:12,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:12,317 INFO L514 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] [2022-02-23 19:55:12,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-23 19:55:12,317 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:12,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:12,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1311927203, now seen corresponding path program 1 times [2022-02-23 19:55:12,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:12,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22079013] [2022-02-23 19:55:12,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:12,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:12,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:12,340 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:12,340 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22079013] [2022-02-23 19:55:12,340 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22079013] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:12,340 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:12,340 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:12,340 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866055118] [2022-02-23 19:55:12,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:12,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:12,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:12,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:12,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:12,341 INFO L87 Difference]: Start difference. First operand 309 states and 531 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) [2022-02-23 19:55:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:12,397 INFO L93 Difference]: Finished difference Result 571 states and 992 transitions. [2022-02-23 19:55:12,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:12,397 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 [2022-02-23 19:55:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:12,399 INFO L225 Difference]: With dead ends: 571 [2022-02-23 19:55:12,399 INFO L226 Difference]: Without dead ends: 571 [2022-02-23 19:55:12,399 INFO L932 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 [2022-02-23 19:55:12,399 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 181 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:12,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 87 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:12,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2022-02-23 19:55:12,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 425. [2022-02-23 19:55:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 421 states have (on average 1.700712589073634) internal successors, (716), 421 states have internal predecessors, (716), 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) [2022-02-23 19:55:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 719 transitions. [2022-02-23 19:55:12,407 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 719 transitions. Word has length 26 [2022-02-23 19:55:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:12,408 INFO L470 AbstractCegarLoop]: Abstraction has 425 states and 719 transitions. [2022-02-23 19:55:12,408 INFO L471 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) [2022-02-23 19:55:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 719 transitions. [2022-02-23 19:55:12,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-23 19:55:12,408 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:12,408 INFO L514 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] [2022-02-23 19:55:12,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-23 19:55:12,409 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:12,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:12,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1475488284, now seen corresponding path program 1 times [2022-02-23 19:55:12,409 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:12,409 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005731237] [2022-02-23 19:55:12,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:12,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:12,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:12,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005731237] [2022-02-23 19:55:12,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005731237] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:12,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:12,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:12,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486029618] [2022-02-23 19:55:12,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:12,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:12,433 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:12,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:12,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:12,434 INFO L87 Difference]: Start difference. First operand 425 states and 719 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) [2022-02-23 19:55:12,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:12,490 INFO L93 Difference]: Finished difference Result 595 states and 1000 transitions. [2022-02-23 19:55:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:12,491 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 [2022-02-23 19:55:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:12,492 INFO L225 Difference]: With dead ends: 595 [2022-02-23 19:55:12,492 INFO L226 Difference]: Without dead ends: 595 [2022-02-23 19:55:12,493 INFO L932 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 [2022-02-23 19:55:12,493 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:12,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 117 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-23 19:55:12,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 593. [2022-02-23 19:55:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 589 states have (on average 1.6910016977928692) internal successors, (996), 589 states have internal predecessors, (996), 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) [2022-02-23 19:55:12,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 999 transitions. [2022-02-23 19:55:12,502 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 999 transitions. Word has length 26 [2022-02-23 19:55:12,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:12,502 INFO L470 AbstractCegarLoop]: Abstraction has 593 states and 999 transitions. [2022-02-23 19:55:12,502 INFO L471 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) [2022-02-23 19:55:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 999 transitions. [2022-02-23 19:55:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 19:55:12,503 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:12,503 INFO L514 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] [2022-02-23 19:55:12,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-23 19:55:12,503 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:12,504 INFO L85 PathProgramCache]: Analyzing trace with hash 2015070056, now seen corresponding path program 1 times [2022-02-23 19:55:12,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:12,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302746288] [2022-02-23 19:55:12,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:12,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:12,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:12,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:12,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302746288] [2022-02-23 19:55:12,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302746288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:12,526 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:12,526 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:12,526 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614547165] [2022-02-23 19:55:12,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:12,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:12,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:12,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:12,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:12,527 INFO L87 Difference]: Start difference. First operand 593 states and 999 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) [2022-02-23 19:55:12,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:12,585 INFO L93 Difference]: Finished difference Result 603 states and 1000 transitions. [2022-02-23 19:55:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:12,585 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 [2022-02-23 19:55:12,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:12,587 INFO L225 Difference]: With dead ends: 603 [2022-02-23 19:55:12,587 INFO L226 Difference]: Without dead ends: 603 [2022-02-23 19:55:12,587 INFO L932 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 [2022-02-23 19:55:12,588 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:12,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 124 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:12,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-02-23 19:55:12,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 601. [2022-02-23 19:55:12,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 601 states, 597 states have (on average 1.6683417085427135) internal successors, (996), 597 states have internal predecessors, (996), 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) [2022-02-23 19:55:12,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 601 states to 601 states and 999 transitions. [2022-02-23 19:55:12,597 INFO L78 Accepts]: Start accepts. Automaton has 601 states and 999 transitions. Word has length 27 [2022-02-23 19:55:12,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:12,597 INFO L470 AbstractCegarLoop]: Abstraction has 601 states and 999 transitions. [2022-02-23 19:55:12,597 INFO L471 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) [2022-02-23 19:55:12,598 INFO L276 IsEmpty]: Start isEmpty. Operand 601 states and 999 transitions. [2022-02-23 19:55:12,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 19:55:12,598 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:12,598 INFO L514 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] [2022-02-23 19:55:12,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-23 19:55:12,598 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:12,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:12,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1504535879, now seen corresponding path program 1 times [2022-02-23 19:55:12,599 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:12,599 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764736537] [2022-02-23 19:55:12,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:12,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:12,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:12,621 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:12,621 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764736537] [2022-02-23 19:55:12,621 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764736537] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:12,621 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:12,621 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:12,621 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700160939] [2022-02-23 19:55:12,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:12,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:12,621 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:12,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:12,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:12,622 INFO L87 Difference]: Start difference. First operand 601 states and 999 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) [2022-02-23 19:55:12,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:12,681 INFO L93 Difference]: Finished difference Result 1099 states and 1848 transitions. [2022-02-23 19:55:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:12,681 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 [2022-02-23 19:55:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:12,684 INFO L225 Difference]: With dead ends: 1099 [2022-02-23 19:55:12,684 INFO L226 Difference]: Without dead ends: 1099 [2022-02-23 19:55:12,684 INFO L932 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 [2022-02-23 19:55:12,685 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 174 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:12,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 86 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:12,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-02-23 19:55:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 841. [2022-02-23 19:55:12,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 837 states have (on average 1.6296296296296295) internal successors, (1364), 837 states have internal predecessors, (1364), 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) [2022-02-23 19:55:12,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1367 transitions. [2022-02-23 19:55:12,699 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1367 transitions. Word has length 27 [2022-02-23 19:55:12,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:12,699 INFO L470 AbstractCegarLoop]: Abstraction has 841 states and 1367 transitions. [2022-02-23 19:55:12,699 INFO L471 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) [2022-02-23 19:55:12,699 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1367 transitions. [2022-02-23 19:55:12,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 19:55:12,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:12,700 INFO L514 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] [2022-02-23 19:55:12,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-23 19:55:12,701 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:12,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:12,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1282879608, now seen corresponding path program 1 times [2022-02-23 19:55:12,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:12,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407411421] [2022-02-23 19:55:12,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:12,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:12,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:12,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407411421] [2022-02-23 19:55:12,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407411421] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:12,724 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:12,724 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:12,725 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761280257] [2022-02-23 19:55:12,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:12,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:12,725 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:12,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:12,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:12,725 INFO L87 Difference]: Start difference. First operand 841 states and 1367 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) [2022-02-23 19:55:12,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:12,783 INFO L93 Difference]: Finished difference Result 1163 states and 1880 transitions. [2022-02-23 19:55:12,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:12,784 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 [2022-02-23 19:55:12,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:12,786 INFO L225 Difference]: With dead ends: 1163 [2022-02-23 19:55:12,787 INFO L226 Difference]: Without dead ends: 1163 [2022-02-23 19:55:12,787 INFO L932 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 [2022-02-23 19:55:12,787 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 154 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:12,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 119 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:12,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2022-02-23 19:55:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1161. [2022-02-23 19:55:12,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 1157 states have (on average 1.6214347450302506) internal successors, (1876), 1157 states have internal predecessors, (1876), 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) [2022-02-23 19:55:12,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 1879 transitions. [2022-02-23 19:55:12,804 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 1879 transitions. Word has length 27 [2022-02-23 19:55:12,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:12,804 INFO L470 AbstractCegarLoop]: Abstraction has 1161 states and 1879 transitions. [2022-02-23 19:55:12,804 INFO L471 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) [2022-02-23 19:55:12,804 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 1879 transitions. [2022-02-23 19:55:12,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 19:55:12,805 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:12,805 INFO L514 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] [2022-02-23 19:55:12,805 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-23 19:55:12,805 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:12,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:12,806 INFO L85 PathProgramCache]: Analyzing trace with hash -603995456, now seen corresponding path program 1 times [2022-02-23 19:55:12,806 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:12,806 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617337886] [2022-02-23 19:55:12,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:12,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:12,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:12,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:12,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:12,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617337886] [2022-02-23 19:55:12,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617337886] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:12,827 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:12,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:12,827 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985280896] [2022-02-23 19:55:12,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:12,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:12,827 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:12,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:12,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:12,828 INFO L87 Difference]: Start difference. First operand 1161 states and 1879 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) [2022-02-23 19:55:12,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:12,885 INFO L93 Difference]: Finished difference Result 1179 states and 1880 transitions. [2022-02-23 19:55:12,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:12,885 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 [2022-02-23 19:55:12,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:12,888 INFO L225 Difference]: With dead ends: 1179 [2022-02-23 19:55:12,888 INFO L226 Difference]: Without dead ends: 1179 [2022-02-23 19:55:12,888 INFO L932 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 [2022-02-23 19:55:12,889 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:12,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 121 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:12,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-02-23 19:55:12,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1177. [2022-02-23 19:55:12,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1173 states have (on average 1.5993179880647912) internal successors, (1876), 1173 states have internal predecessors, (1876), 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) [2022-02-23 19:55:12,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 1879 transitions. [2022-02-23 19:55:12,906 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 1879 transitions. Word has length 28 [2022-02-23 19:55:12,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:12,906 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 1879 transitions. [2022-02-23 19:55:12,906 INFO L471 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) [2022-02-23 19:55:12,906 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 1879 transitions. [2022-02-23 19:55:12,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 19:55:12,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:12,908 INFO L514 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] [2022-02-23 19:55:12,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-23 19:55:12,908 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:12,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:12,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1114529633, now seen corresponding path program 1 times [2022-02-23 19:55:12,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:12,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548176139] [2022-02-23 19:55:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:12,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:12,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:12,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:12,961 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:12,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548176139] [2022-02-23 19:55:12,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548176139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:12,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:12,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:12,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170674162] [2022-02-23 19:55:12,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:12,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:12,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:12,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:12,964 INFO L87 Difference]: Start difference. First operand 1177 states and 1879 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) [2022-02-23 19:55:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:13,027 INFO L93 Difference]: Finished difference Result 2123 states and 3432 transitions. [2022-02-23 19:55:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:13,028 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 [2022-02-23 19:55:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:13,033 INFO L225 Difference]: With dead ends: 2123 [2022-02-23 19:55:13,033 INFO L226 Difference]: Without dead ends: 2123 [2022-02-23 19:55:13,033 INFO L932 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 [2022-02-23 19:55:13,034 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 167 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:13,034 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 85 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:13,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2123 states. [2022-02-23 19:55:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2123 to 1673. [2022-02-23 19:55:13,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1669 states have (on average 1.555422408627921) internal successors, (2596), 1669 states have internal predecessors, (2596), 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) [2022-02-23 19:55:13,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 2599 transitions. [2022-02-23 19:55:13,063 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 2599 transitions. Word has length 28 [2022-02-23 19:55:13,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:13,063 INFO L470 AbstractCegarLoop]: Abstraction has 1673 states and 2599 transitions. [2022-02-23 19:55:13,064 INFO L471 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) [2022-02-23 19:55:13,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 2599 transitions. [2022-02-23 19:55:13,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-23 19:55:13,065 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:13,065 INFO L514 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] [2022-02-23 19:55:13,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-23 19:55:13,065 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:13,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:13,066 INFO L85 PathProgramCache]: Analyzing trace with hash 393022176, now seen corresponding path program 1 times [2022-02-23 19:55:13,066 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:13,066 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215494164] [2022-02-23 19:55:13,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:13,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:13,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:13,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:13,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:13,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215494164] [2022-02-23 19:55:13,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215494164] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:13,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:13,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:13,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141422231] [2022-02-23 19:55:13,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:13,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:13,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:13,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:13,092 INFO L87 Difference]: Start difference. First operand 1673 states and 2599 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) [2022-02-23 19:55:13,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:13,151 INFO L93 Difference]: Finished difference Result 2283 states and 3528 transitions. [2022-02-23 19:55:13,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:13,151 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 [2022-02-23 19:55:13,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:13,157 INFO L225 Difference]: With dead ends: 2283 [2022-02-23 19:55:13,157 INFO L226 Difference]: Without dead ends: 2283 [2022-02-23 19:55:13,157 INFO L932 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 [2022-02-23 19:55:13,158 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:13,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 121 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2022-02-23 19:55:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 2281. [2022-02-23 19:55:13,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2281 states, 2277 states have (on average 1.5476504172156347) internal successors, (3524), 2277 states have internal predecessors, (3524), 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) [2022-02-23 19:55:13,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2281 states to 2281 states and 3527 transitions. [2022-02-23 19:55:13,192 INFO L78 Accepts]: Start accepts. Automaton has 2281 states and 3527 transitions. Word has length 28 [2022-02-23 19:55:13,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:13,193 INFO L470 AbstractCegarLoop]: Abstraction has 2281 states and 3527 transitions. [2022-02-23 19:55:13,193 INFO L471 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) [2022-02-23 19:55:13,193 INFO L276 IsEmpty]: Start isEmpty. Operand 2281 states and 3527 transitions. [2022-02-23 19:55:13,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 19:55:13,195 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:13,195 INFO L514 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] [2022-02-23 19:55:13,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-23 19:55:13,195 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:13,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:13,195 INFO L85 PathProgramCache]: Analyzing trace with hash -190647580, now seen corresponding path program 1 times [2022-02-23 19:55:13,195 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:13,195 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021185831] [2022-02-23 19:55:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:13,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:13,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:13,233 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:13,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021185831] [2022-02-23 19:55:13,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021185831] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:13,233 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:13,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:13,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525269074] [2022-02-23 19:55:13,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:13,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:13,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:13,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:13,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:13,234 INFO L87 Difference]: Start difference. First operand 2281 states and 3527 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) [2022-02-23 19:55:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:13,293 INFO L93 Difference]: Finished difference Result 2315 states and 3528 transitions. [2022-02-23 19:55:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:13,294 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 [2022-02-23 19:55:13,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:13,299 INFO L225 Difference]: With dead ends: 2315 [2022-02-23 19:55:13,300 INFO L226 Difference]: Without dead ends: 2315 [2022-02-23 19:55:13,300 INFO L932 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 [2022-02-23 19:55:13,301 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 152 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:13,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 118 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:13,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2022-02-23 19:55:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2313. [2022-02-23 19:55:13,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2313 states, 2309 states have (on average 1.5262018189692508) internal successors, (3524), 2309 states have internal predecessors, (3524), 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) [2022-02-23 19:55:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2313 states to 2313 states and 3527 transitions. [2022-02-23 19:55:13,334 INFO L78 Accepts]: Start accepts. Automaton has 2313 states and 3527 transitions. Word has length 29 [2022-02-23 19:55:13,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:13,334 INFO L470 AbstractCegarLoop]: Abstraction has 2313 states and 3527 transitions. [2022-02-23 19:55:13,334 INFO L471 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) [2022-02-23 19:55:13,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2313 states and 3527 transitions. [2022-02-23 19:55:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 19:55:13,336 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:13,336 INFO L514 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] [2022-02-23 19:55:13,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-23 19:55:13,336 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:13,337 INFO L85 PathProgramCache]: Analyzing trace with hash -701181757, now seen corresponding path program 1 times [2022-02-23 19:55:13,337 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:13,337 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458691833] [2022-02-23 19:55:13,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:13,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:13,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:13,375 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:13,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458691833] [2022-02-23 19:55:13,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458691833] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:13,376 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:13,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:13,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746348927] [2022-02-23 19:55:13,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:13,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:13,377 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:13,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:13,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:13,377 INFO L87 Difference]: Start difference. First operand 2313 states and 3527 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) [2022-02-23 19:55:13,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:13,444 INFO L93 Difference]: Finished difference Result 4107 states and 6344 transitions. [2022-02-23 19:55:13,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:13,445 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 [2022-02-23 19:55:13,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:13,456 INFO L225 Difference]: With dead ends: 4107 [2022-02-23 19:55:13,456 INFO L226 Difference]: Without dead ends: 4107 [2022-02-23 19:55:13,456 INFO L932 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 [2022-02-23 19:55:13,457 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 160 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:13,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 84 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:13,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2022-02-23 19:55:13,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3337. [2022-02-23 19:55:13,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3337 states, 3333 states have (on average 1.4797479747974798) internal successors, (4932), 3333 states have internal predecessors, (4932), 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) [2022-02-23 19:55:13,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3337 states to 3337 states and 4935 transitions. [2022-02-23 19:55:13,509 INFO L78 Accepts]: Start accepts. Automaton has 3337 states and 4935 transitions. Word has length 29 [2022-02-23 19:55:13,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:13,510 INFO L470 AbstractCegarLoop]: Abstraction has 3337 states and 4935 transitions. [2022-02-23 19:55:13,510 INFO L471 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) [2022-02-23 19:55:13,510 INFO L276 IsEmpty]: Start isEmpty. Operand 3337 states and 4935 transitions. [2022-02-23 19:55:13,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 19:55:13,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:13,514 INFO L514 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] [2022-02-23 19:55:13,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-23 19:55:13,514 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:13,514 INFO L85 PathProgramCache]: Analyzing trace with hash 806370052, now seen corresponding path program 1 times [2022-02-23 19:55:13,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:13,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714138413] [2022-02-23 19:55:13,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:13,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:13,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:13,538 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:13,538 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714138413] [2022-02-23 19:55:13,538 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714138413] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:13,538 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:13,538 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:13,538 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836966973] [2022-02-23 19:55:13,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:13,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:13,538 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:13,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:13,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:13,539 INFO L87 Difference]: Start difference. First operand 3337 states and 4935 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) [2022-02-23 19:55:13,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:13,620 INFO L93 Difference]: Finished difference Result 4491 states and 6600 transitions. [2022-02-23 19:55:13,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:13,621 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 [2022-02-23 19:55:13,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:13,632 INFO L225 Difference]: With dead ends: 4491 [2022-02-23 19:55:13,632 INFO L226 Difference]: Without dead ends: 4491 [2022-02-23 19:55:13,632 INFO L932 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 [2022-02-23 19:55:13,633 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 142 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:13,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 123 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:13,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4491 states. [2022-02-23 19:55:13,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4491 to 4489. [2022-02-23 19:55:13,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 4485 states have (on average 1.470680044593088) internal successors, (6596), 4485 states have internal predecessors, (6596), 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) [2022-02-23 19:55:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 6599 transitions. [2022-02-23 19:55:13,705 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 6599 transitions. Word has length 29 [2022-02-23 19:55:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:13,705 INFO L470 AbstractCegarLoop]: Abstraction has 4489 states and 6599 transitions. [2022-02-23 19:55:13,705 INFO L471 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) [2022-02-23 19:55:13,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 6599 transitions. [2022-02-23 19:55:13,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 19:55:13,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:13,709 INFO L514 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] [2022-02-23 19:55:13,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-23 19:55:13,710 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:13,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:13,710 INFO L85 PathProgramCache]: Analyzing trace with hash -261765188, now seen corresponding path program 1 times [2022-02-23 19:55:13,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:13,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604729192] [2022-02-23 19:55:13,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:13,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:13,746 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:13,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604729192] [2022-02-23 19:55:13,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604729192] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:13,746 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:13,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:13,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74592310] [2022-02-23 19:55:13,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:13,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:13,747 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:13,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:13,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:13,747 INFO L87 Difference]: Start difference. First operand 4489 states and 6599 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) [2022-02-23 19:55:13,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:13,826 INFO L93 Difference]: Finished difference Result 4555 states and 6600 transitions. [2022-02-23 19:55:13,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:13,826 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 [2022-02-23 19:55:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:13,838 INFO L225 Difference]: With dead ends: 4555 [2022-02-23 19:55:13,839 INFO L226 Difference]: Without dead ends: 4555 [2022-02-23 19:55:13,839 INFO L932 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 [2022-02-23 19:55:13,839 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 151 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:13,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 115 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:13,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4555 states. [2022-02-23 19:55:13,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4555 to 4553. [2022-02-23 19:55:13,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4553 states, 4549 states have (on average 1.449989008573313) internal successors, (6596), 4549 states have internal predecessors, (6596), 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) [2022-02-23 19:55:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4553 states to 4553 states and 6599 transitions. [2022-02-23 19:55:13,898 INFO L78 Accepts]: Start accepts. Automaton has 4553 states and 6599 transitions. Word has length 30 [2022-02-23 19:55:13,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:13,898 INFO L470 AbstractCegarLoop]: Abstraction has 4553 states and 6599 transitions. [2022-02-23 19:55:13,898 INFO L471 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) [2022-02-23 19:55:13,898 INFO L276 IsEmpty]: Start isEmpty. Operand 4553 states and 6599 transitions. [2022-02-23 19:55:13,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 19:55:13,901 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:13,901 INFO L514 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] [2022-02-23 19:55:13,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-23 19:55:13,902 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:13,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:13,902 INFO L85 PathProgramCache]: Analyzing trace with hash -772299365, now seen corresponding path program 1 times [2022-02-23 19:55:13,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:13,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103841571] [2022-02-23 19:55:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:13,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:13,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:13,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:13,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:13,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:13,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103841571] [2022-02-23 19:55:13,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103841571] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:13,926 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:13,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:13,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856242047] [2022-02-23 19:55:13,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:13,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:13,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:13,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:13,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:13,927 INFO L87 Difference]: Start difference. First operand 4553 states and 6599 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) [2022-02-23 19:55:13,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:13,992 INFO L93 Difference]: Finished difference Result 7947 states and 11656 transitions. [2022-02-23 19:55:13,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:13,993 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 [2022-02-23 19:55:13,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:14,007 INFO L225 Difference]: With dead ends: 7947 [2022-02-23 19:55:14,007 INFO L226 Difference]: Without dead ends: 7947 [2022-02-23 19:55:14,007 INFO L932 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 [2022-02-23 19:55:14,007 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 153 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:14,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 83 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:14,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7947 states. [2022-02-23 19:55:14,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7947 to 6665. [2022-02-23 19:55:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6665 states, 6661 states have (on average 1.4033928839513587) internal successors, (9348), 6661 states have internal predecessors, (9348), 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) [2022-02-23 19:55:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6665 states to 6665 states and 9351 transitions. [2022-02-23 19:55:14,102 INFO L78 Accepts]: Start accepts. Automaton has 6665 states and 9351 transitions. Word has length 30 [2022-02-23 19:55:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:14,102 INFO L470 AbstractCegarLoop]: Abstraction has 6665 states and 9351 transitions. [2022-02-23 19:55:14,102 INFO L471 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) [2022-02-23 19:55:14,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6665 states and 9351 transitions. [2022-02-23 19:55:14,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-23 19:55:14,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:14,109 INFO L514 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] [2022-02-23 19:55:14,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-23 19:55:14,109 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:14,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:14,111 INFO L85 PathProgramCache]: Analyzing trace with hash 735252444, now seen corresponding path program 1 times [2022-02-23 19:55:14,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:14,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334269046] [2022-02-23 19:55:14,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:14,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:14,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:14,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:14,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:14,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:14,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334269046] [2022-02-23 19:55:14,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334269046] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:14,145 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:14,145 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:14,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405767836] [2022-02-23 19:55:14,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:14,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:14,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:14,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:14,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:14,147 INFO L87 Difference]: Start difference. First operand 6665 states and 9351 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) [2022-02-23 19:55:14,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:14,234 INFO L93 Difference]: Finished difference Result 8843 states and 12296 transitions. [2022-02-23 19:55:14,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:14,235 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 [2022-02-23 19:55:14,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:14,246 INFO L225 Difference]: With dead ends: 8843 [2022-02-23 19:55:14,246 INFO L226 Difference]: Without dead ends: 8843 [2022-02-23 19:55:14,246 INFO L932 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 [2022-02-23 19:55:14,248 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 136 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:14,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 125 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:14,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8843 states. [2022-02-23 19:55:14,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8843 to 8841. [2022-02-23 19:55:14,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8837 states have (on average 1.3909697861265136) internal successors, (12292), 8837 states have internal predecessors, (12292), 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) [2022-02-23 19:55:14,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 12295 transitions. [2022-02-23 19:55:14,356 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 12295 transitions. Word has length 30 [2022-02-23 19:55:14,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:14,356 INFO L470 AbstractCegarLoop]: Abstraction has 8841 states and 12295 transitions. [2022-02-23 19:55:14,356 INFO L471 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) [2022-02-23 19:55:14,356 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 12295 transitions. [2022-02-23 19:55:14,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 19:55:14,363 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:14,363 INFO L514 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] [2022-02-23 19:55:14,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-23 19:55:14,364 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:14,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:14,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1828556384, now seen corresponding path program 1 times [2022-02-23 19:55:14,364 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:14,364 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140557063] [2022-02-23 19:55:14,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:14,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:14,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:14,390 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:14,390 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140557063] [2022-02-23 19:55:14,390 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140557063] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:14,390 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:14,390 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:14,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325158856] [2022-02-23 19:55:14,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:14,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:14,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:14,391 INFO L87 Difference]: Start difference. First operand 8841 states and 12295 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) [2022-02-23 19:55:14,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:14,459 INFO L93 Difference]: Finished difference Result 8971 states and 12296 transitions. [2022-02-23 19:55:14,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:14,460 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 [2022-02-23 19:55:14,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:14,472 INFO L225 Difference]: With dead ends: 8971 [2022-02-23 19:55:14,473 INFO L226 Difference]: Without dead ends: 8971 [2022-02-23 19:55:14,473 INFO L932 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 [2022-02-23 19:55:14,474 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:14,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 112 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:14,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8971 states. [2022-02-23 19:55:14,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8971 to 8969. [2022-02-23 19:55:14,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8969 states, 8965 states have (on average 1.3711098717233687) internal successors, (12292), 8965 states have internal predecessors, (12292), 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) [2022-02-23 19:55:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8969 states to 8969 states and 12295 transitions. [2022-02-23 19:55:14,585 INFO L78 Accepts]: Start accepts. Automaton has 8969 states and 12295 transitions. Word has length 31 [2022-02-23 19:55:14,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:14,585 INFO L470 AbstractCegarLoop]: Abstraction has 8969 states and 12295 transitions. [2022-02-23 19:55:14,585 INFO L471 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) [2022-02-23 19:55:14,585 INFO L276 IsEmpty]: Start isEmpty. Operand 8969 states and 12295 transitions. [2022-02-23 19:55:14,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 19:55:14,593 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:14,593 INFO L514 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] [2022-02-23 19:55:14,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-23 19:55:14,593 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:14,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:14,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1318022207, now seen corresponding path program 1 times [2022-02-23 19:55:14,593 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:14,593 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840900390] [2022-02-23 19:55:14,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:14,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:14,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:14,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:14,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:14,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:14,616 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:14,616 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840900390] [2022-02-23 19:55:14,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840900390] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:14,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:14,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:14,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197338259] [2022-02-23 19:55:14,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:14,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:14,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:14,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:14,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:14,617 INFO L87 Difference]: Start difference. First operand 8969 states and 12295 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) [2022-02-23 19:55:14,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:14,725 INFO L93 Difference]: Finished difference Result 15371 states and 21256 transitions. [2022-02-23 19:55:14,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:14,726 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 [2022-02-23 19:55:14,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:14,748 INFO L225 Difference]: With dead ends: 15371 [2022-02-23 19:55:14,748 INFO L226 Difference]: Without dead ends: 15371 [2022-02-23 19:55:14,749 INFO L932 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 [2022-02-23 19:55:14,749 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 146 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:14,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 82 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15371 states. [2022-02-23 19:55:14,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15371 to 13321. [2022-02-23 19:55:14,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13321 states, 13317 states have (on average 1.326725238417061) internal successors, (17668), 13317 states have internal predecessors, (17668), 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) [2022-02-23 19:55:14,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13321 states to 13321 states and 17671 transitions. [2022-02-23 19:55:14,920 INFO L78 Accepts]: Start accepts. Automaton has 13321 states and 17671 transitions. Word has length 31 [2022-02-23 19:55:14,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:14,921 INFO L470 AbstractCegarLoop]: Abstraction has 13321 states and 17671 transitions. [2022-02-23 19:55:14,921 INFO L471 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) [2022-02-23 19:55:14,921 INFO L276 IsEmpty]: Start isEmpty. Operand 13321 states and 17671 transitions. [2022-02-23 19:55:14,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-23 19:55:14,934 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:14,934 INFO L514 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] [2022-02-23 19:55:14,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-23 19:55:14,934 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:14,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:14,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1469393280, now seen corresponding path program 1 times [2022-02-23 19:55:14,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:14,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690694665] [2022-02-23 19:55:14,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:14,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:14,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:14,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:14,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:14,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:14,959 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690694665] [2022-02-23 19:55:14,959 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690694665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:14,959 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:14,959 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:14,959 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288377648] [2022-02-23 19:55:14,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:14,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:14,960 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:14,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:14,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:14,960 INFO L87 Difference]: Start difference. First operand 13321 states and 17671 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) [2022-02-23 19:55:15,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:15,056 INFO L93 Difference]: Finished difference Result 17419 states and 22792 transitions. [2022-02-23 19:55:15,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:15,057 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 [2022-02-23 19:55:15,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:15,086 INFO L225 Difference]: With dead ends: 17419 [2022-02-23 19:55:15,086 INFO L226 Difference]: Without dead ends: 17419 [2022-02-23 19:55:15,086 INFO L932 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 [2022-02-23 19:55:15,088 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:15,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 127 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:15,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17419 states. [2022-02-23 19:55:15,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17419 to 17417. [2022-02-23 19:55:15,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17417 states, 17413 states have (on average 1.3086774249124218) internal successors, (22788), 17413 states have internal predecessors, (22788), 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) [2022-02-23 19:55:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17417 states to 17417 states and 22791 transitions. [2022-02-23 19:55:15,313 INFO L78 Accepts]: Start accepts. Automaton has 17417 states and 22791 transitions. Word has length 31 [2022-02-23 19:55:15,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:15,313 INFO L470 AbstractCegarLoop]: Abstraction has 17417 states and 22791 transitions. [2022-02-23 19:55:15,313 INFO L471 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) [2022-02-23 19:55:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 17417 states and 22791 transitions. [2022-02-23 19:55:15,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 19:55:15,370 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:15,370 INFO L514 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] [2022-02-23 19:55:15,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-23 19:55:15,370 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:15,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:15,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2090951496, now seen corresponding path program 1 times [2022-02-23 19:55:15,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:15,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144006733] [2022-02-23 19:55:15,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:15,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:15,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:15,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:15,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:15,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:15,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144006733] [2022-02-23 19:55:15,407 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144006733] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:15,407 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:15,407 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:15,407 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627753200] [2022-02-23 19:55:15,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:15,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:15,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:15,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:15,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:15,408 INFO L87 Difference]: Start difference. First operand 17417 states and 22791 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) [2022-02-23 19:55:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:15,499 INFO L93 Difference]: Finished difference Result 17675 states and 22792 transitions. [2022-02-23 19:55:15,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:15,500 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 [2022-02-23 19:55:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:15,526 INFO L225 Difference]: With dead ends: 17675 [2022-02-23 19:55:15,527 INFO L226 Difference]: Without dead ends: 17675 [2022-02-23 19:55:15,527 INFO L932 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 [2022-02-23 19:55:15,527 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 149 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:15,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 109 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17675 states. [2022-02-23 19:55:15,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17675 to 17673. [2022-02-23 19:55:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17673 states, 17669 states have (on average 1.2897164525440037) internal successors, (22788), 17669 states have internal predecessors, (22788), 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) [2022-02-23 19:55:15,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17673 states to 17673 states and 22791 transitions. [2022-02-23 19:55:15,766 INFO L78 Accepts]: Start accepts. Automaton has 17673 states and 22791 transitions. Word has length 32 [2022-02-23 19:55:15,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:15,767 INFO L470 AbstractCegarLoop]: Abstraction has 17673 states and 22791 transitions. [2022-02-23 19:55:15,767 INFO L471 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) [2022-02-23 19:55:15,767 INFO L276 IsEmpty]: Start isEmpty. Operand 17673 states and 22791 transitions. [2022-02-23 19:55:15,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 19:55:15,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:15,781 INFO L514 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] [2022-02-23 19:55:15,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-23 19:55:15,781 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:15,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:15,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1693481623, now seen corresponding path program 1 times [2022-02-23 19:55:15,781 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:15,781 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26563469] [2022-02-23 19:55:15,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:15,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:15,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:15,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:15,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:15,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:15,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26563469] [2022-02-23 19:55:15,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26563469] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:15,807 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:15,807 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:15,807 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068486451] [2022-02-23 19:55:15,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:15,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:15,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:15,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:15,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:15,807 INFO L87 Difference]: Start difference. First operand 17673 states and 22791 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) [2022-02-23 19:55:15,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:15,916 INFO L93 Difference]: Finished difference Result 29707 states and 38408 transitions. [2022-02-23 19:55:15,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:15,917 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 [2022-02-23 19:55:15,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:15,963 INFO L225 Difference]: With dead ends: 29707 [2022-02-23 19:55:15,963 INFO L226 Difference]: Without dead ends: 29707 [2022-02-23 19:55:15,964 INFO L932 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 [2022-02-23 19:55:15,964 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 139 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:15,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 81 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29707 states. [2022-02-23 19:55:16,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29707 to 26633. [2022-02-23 19:55:16,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26633 states, 26629 states have (on average 1.249915505651733) internal successors, (33284), 26629 states have internal predecessors, (33284), 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) [2022-02-23 19:55:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26633 states to 26633 states and 33287 transitions. [2022-02-23 19:55:16,350 INFO L78 Accepts]: Start accepts. Automaton has 26633 states and 33287 transitions. Word has length 32 [2022-02-23 19:55:16,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:16,350 INFO L470 AbstractCegarLoop]: Abstraction has 26633 states and 33287 transitions. [2022-02-23 19:55:16,350 INFO L471 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) [2022-02-23 19:55:16,350 INFO L276 IsEmpty]: Start isEmpty. Operand 26633 states and 33287 transitions. [2022-02-23 19:55:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-23 19:55:16,374 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:16,374 INFO L514 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] [2022-02-23 19:55:16,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-23 19:55:16,374 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:16,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1093933864, now seen corresponding path program 1 times [2022-02-23 19:55:16,375 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:16,375 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952319897] [2022-02-23 19:55:16,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:16,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:16,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:16,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:16,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:16,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:16,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:16,392 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952319897] [2022-02-23 19:55:16,392 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952319897] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:16,392 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:16,392 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:16,392 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531484051] [2022-02-23 19:55:16,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:16,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:16,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:16,393 INFO L87 Difference]: Start difference. First operand 26633 states and 33287 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) [2022-02-23 19:55:16,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:16,496 INFO L93 Difference]: Finished difference Result 34315 states and 41992 transitions. [2022-02-23 19:55:16,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:16,496 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 [2022-02-23 19:55:16,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:16,616 INFO L225 Difference]: With dead ends: 34315 [2022-02-23 19:55:16,616 INFO L226 Difference]: Without dead ends: 34315 [2022-02-23 19:55:16,616 INFO L932 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 [2022-02-23 19:55:16,616 INFO L933 BasicCegarLoop]: 122 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:16,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 129 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:16,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34315 states. [2022-02-23 19:55:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34315 to 34313. [2022-02-23 19:55:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34313 states, 34309 states have (on average 1.2238188230493456) internal successors, (41988), 34309 states have internal predecessors, (41988), 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) [2022-02-23 19:55:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34313 states to 34313 states and 41991 transitions. [2022-02-23 19:55:16,981 INFO L78 Accepts]: Start accepts. Automaton has 34313 states and 41991 transitions. Word has length 32 [2022-02-23 19:55:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:16,981 INFO L470 AbstractCegarLoop]: Abstraction has 34313 states and 41991 transitions. [2022-02-23 19:55:16,981 INFO L471 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) [2022-02-23 19:55:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 34313 states and 41991 transitions. [2022-02-23 19:55:16,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 19:55:16,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:16,997 INFO L514 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] [2022-02-23 19:55:16,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-23 19:55:16,998 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:16,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:16,998 INFO L85 PathProgramCache]: Analyzing trace with hash 958355932, now seen corresponding path program 1 times [2022-02-23 19:55:16,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:16,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784806335] [2022-02-23 19:55:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:16,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:17,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:17,017 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:17,017 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784806335] [2022-02-23 19:55:17,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784806335] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:17,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:17,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:17,018 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339676488] [2022-02-23 19:55:17,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:17,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:17,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:17,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:17,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:17,018 INFO L87 Difference]: Start difference. First operand 34313 states and 41991 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) [2022-02-23 19:55:17,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:17,132 INFO L93 Difference]: Finished difference Result 34827 states and 41992 transitions. [2022-02-23 19:55:17,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:17,132 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 [2022-02-23 19:55:17,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:17,171 INFO L225 Difference]: With dead ends: 34827 [2022-02-23 19:55:17,171 INFO L226 Difference]: Without dead ends: 34827 [2022-02-23 19:55:17,171 INFO L932 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 [2022-02-23 19:55:17,172 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 148 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:17,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:17,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34827 states. [2022-02-23 19:55:17,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34827 to 34825. [2022-02-23 19:55:17,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34825 states, 34821 states have (on average 1.2058240716808821) internal successors, (41988), 34821 states have internal predecessors, (41988), 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) [2022-02-23 19:55:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34825 states to 34825 states and 41991 transitions. [2022-02-23 19:55:17,614 INFO L78 Accepts]: Start accepts. Automaton has 34825 states and 41991 transitions. Word has length 33 [2022-02-23 19:55:17,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:17,614 INFO L470 AbstractCegarLoop]: Abstraction has 34825 states and 41991 transitions. [2022-02-23 19:55:17,614 INFO L471 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) [2022-02-23 19:55:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 34825 states and 41991 transitions. [2022-02-23 19:55:17,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 19:55:17,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:17,630 INFO L514 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] [2022-02-23 19:55:17,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-23 19:55:17,630 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:17,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:17,630 INFO L85 PathProgramCache]: Analyzing trace with hash 447821755, now seen corresponding path program 1 times [2022-02-23 19:55:17,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:17,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785402455] [2022-02-23 19:55:17,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:17,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:17,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:17,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:17,649 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:17,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785402455] [2022-02-23 19:55:17,649 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785402455] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:17,649 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:17,649 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:17,649 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696370024] [2022-02-23 19:55:17,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:17,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:17,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:17,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:17,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:17,650 INFO L87 Difference]: Start difference. First operand 34825 states and 41991 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) [2022-02-23 19:55:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:17,803 INFO L93 Difference]: Finished difference Result 57355 states and 68616 transitions. [2022-02-23 19:55:17,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:17,803 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 [2022-02-23 19:55:17,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:17,878 INFO L225 Difference]: With dead ends: 57355 [2022-02-23 19:55:17,879 INFO L226 Difference]: Without dead ends: 57355 [2022-02-23 19:55:17,879 INFO L932 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 [2022-02-23 19:55:17,879 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 132 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:17,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 80 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:17,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57355 states. [2022-02-23 19:55:18,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57355 to 53257. [2022-02-23 19:55:18,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53257 states, 53253 states have (on average 1.1730418943533698) internal successors, (62468), 53253 states have internal predecessors, (62468), 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) [2022-02-23 19:55:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53257 states to 53257 states and 62471 transitions. [2022-02-23 19:55:18,568 INFO L78 Accepts]: Start accepts. Automaton has 53257 states and 62471 transitions. Word has length 33 [2022-02-23 19:55:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:18,568 INFO L470 AbstractCegarLoop]: Abstraction has 53257 states and 62471 transitions. [2022-02-23 19:55:18,568 INFO L471 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) [2022-02-23 19:55:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 53257 states and 62471 transitions. [2022-02-23 19:55:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-23 19:55:18,602 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:18,602 INFO L514 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] [2022-02-23 19:55:18,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-23 19:55:18,603 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:18,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1955373564, now seen corresponding path program 1 times [2022-02-23 19:55:18,603 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:18,603 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438123006] [2022-02-23 19:55:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:18,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:18,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:18,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438123006] [2022-02-23 19:55:18,625 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438123006] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:18,625 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:18,625 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:18,625 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736274266] [2022-02-23 19:55:18,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:18,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:18,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:18,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:18,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:18,626 INFO L87 Difference]: Start difference. First operand 53257 states and 62471 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) [2022-02-23 19:55:18,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:18,987 INFO L93 Difference]: Finished difference Result 67595 states and 76808 transitions. [2022-02-23 19:55:18,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:18,988 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 [2022-02-23 19:55:18,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:19,054 INFO L225 Difference]: With dead ends: 67595 [2022-02-23 19:55:19,054 INFO L226 Difference]: Without dead ends: 67595 [2022-02-23 19:55:19,055 INFO L932 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 [2022-02-23 19:55:19,056 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 118 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:19,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 131 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:19,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67595 states. [2022-02-23 19:55:19,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67595 to 67593. [2022-02-23 19:55:19,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67593 states, 67589 states have (on average 1.1363387533474383) internal successors, (76804), 67589 states have internal predecessors, (76804), 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) [2022-02-23 19:55:19,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67593 states to 67593 states and 76807 transitions. [2022-02-23 19:55:19,872 INFO L78 Accepts]: Start accepts. Automaton has 67593 states and 76807 transitions. Word has length 33 [2022-02-23 19:55:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:19,872 INFO L470 AbstractCegarLoop]: Abstraction has 67593 states and 76807 transitions. [2022-02-23 19:55:19,872 INFO L471 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) [2022-02-23 19:55:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 67593 states and 76807 transitions. [2022-02-23 19:55:19,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 19:55:19,908 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:19,908 INFO L514 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] [2022-02-23 19:55:19,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-23 19:55:19,908 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:19,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:19,908 INFO L85 PathProgramCache]: Analyzing trace with hash 997605812, now seen corresponding path program 1 times [2022-02-23 19:55:19,909 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:19,909 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878286954] [2022-02-23 19:55:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:19,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:19,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:19,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:19,942 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:19,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878286954] [2022-02-23 19:55:19,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878286954] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:19,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:19,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:19,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115548349] [2022-02-23 19:55:19,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:19,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:19,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:19,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:19,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:19,943 INFO L87 Difference]: Start difference. First operand 67593 states and 76807 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) [2022-02-23 19:55:20,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:20,306 INFO L93 Difference]: Finished difference Result 68619 states and 76808 transitions. [2022-02-23 19:55:20,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:20,306 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 [2022-02-23 19:55:20,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:20,374 INFO L225 Difference]: With dead ends: 68619 [2022-02-23 19:55:20,374 INFO L226 Difference]: Without dead ends: 68619 [2022-02-23 19:55:20,374 INFO L932 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 [2022-02-23 19:55:20,375 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 147 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:20,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 103 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:20,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68619 states. [2022-02-23 19:55:21,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68619 to 68617. [2022-02-23 19:55:21,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68617 states, 68613 states have (on average 1.119379709384519) internal successors, (76804), 68613 states have internal predecessors, (76804), 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) [2022-02-23 19:55:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68617 states to 68617 states and 76807 transitions. [2022-02-23 19:55:21,197 INFO L78 Accepts]: Start accepts. Automaton has 68617 states and 76807 transitions. Word has length 34 [2022-02-23 19:55:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:21,197 INFO L470 AbstractCegarLoop]: Abstraction has 68617 states and 76807 transitions. [2022-02-23 19:55:21,197 INFO L471 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) [2022-02-23 19:55:21,197 INFO L276 IsEmpty]: Start isEmpty. Operand 68617 states and 76807 transitions. [2022-02-23 19:55:21,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 19:55:21,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:21,229 INFO L514 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] [2022-02-23 19:55:21,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-23 19:55:21,229 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:21,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:21,229 INFO L85 PathProgramCache]: Analyzing trace with hash 487071635, now seen corresponding path program 1 times [2022-02-23 19:55:21,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:21,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664618743] [2022-02-23 19:55:21,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:21,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:21,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:21,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:21,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:21,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664618743] [2022-02-23 19:55:21,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664618743] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:21,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:21,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:21,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266351307] [2022-02-23 19:55:21,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:21,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:21,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:21,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:21,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:21,252 INFO L87 Difference]: Start difference. First operand 68617 states and 76807 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) [2022-02-23 19:55:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:21,691 INFO L93 Difference]: Finished difference Result 110601 states and 120839 transitions. [2022-02-23 19:55:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:21,692 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 [2022-02-23 19:55:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:21,831 INFO L225 Difference]: With dead ends: 110601 [2022-02-23 19:55:21,831 INFO L226 Difference]: Without dead ends: 110601 [2022-02-23 19:55:21,831 INFO L932 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 [2022-02-23 19:55:21,832 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 124 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:21,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 78 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 19:55:21,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110601 states. [2022-02-23 19:55:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110601 to 106505. [2022-02-23 19:55:22,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106505 states, 106501 states have (on average 1.0961399423479592) internal successors, (116740), 106501 states have internal predecessors, (116740), 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) [2022-02-23 19:55:23,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106505 states to 106505 states and 116743 transitions. [2022-02-23 19:55:23,163 INFO L78 Accepts]: Start accepts. Automaton has 106505 states and 116743 transitions. Word has length 34 [2022-02-23 19:55:23,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:23,163 INFO L470 AbstractCegarLoop]: Abstraction has 106505 states and 116743 transitions. [2022-02-23 19:55:23,164 INFO L471 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) [2022-02-23 19:55:23,164 INFO L276 IsEmpty]: Start isEmpty. Operand 106505 states and 116743 transitions. [2022-02-23 19:55:23,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-23 19:55:23,226 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 19:55:23,226 INFO L514 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] [2022-02-23 19:55:23,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-23 19:55:23,226 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 19:55:23,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 19:55:23,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1994623444, now seen corresponding path program 1 times [2022-02-23 19:55:23,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 19:55:23,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214481348] [2022-02-23 19:55:23,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 19:55:23,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 19:55:23,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:23,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 19:55:23,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 19:55:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 19:55:23,244 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 19:55:23,244 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214481348] [2022-02-23 19:55:23,244 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214481348] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 19:55:23,244 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 19:55:23,244 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 19:55:23,244 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445680565] [2022-02-23 19:55:23,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 19:55:23,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 19:55:23,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 19:55:23,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 19:55:23,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 19:55:23,245 INFO L87 Difference]: Start difference. First operand 106505 states and 116743 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) [2022-02-23 19:55:23,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 19:55:23,784 INFO L93 Difference]: Finished difference Result 133127 states and 139270 transitions. [2022-02-23 19:55:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 19:55:23,785 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 [2022-02-23 19:55:23,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 19:55:23,785 INFO L225 Difference]: With dead ends: 133127 [2022-02-23 19:55:23,785 INFO L226 Difference]: Without dead ends: 0 [2022-02-23 19:55:23,785 INFO L932 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 [2022-02-23 19:55:23,786 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 19:55:23,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 132 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 19:55:23,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-23 19:55:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-23 19:55:23,786 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) [2022-02-23 19:55:23,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-23 19:55:23,786 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2022-02-23 19:55:23,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 19:55:23,787 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-23 19:55:23,787 INFO L471 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) [2022-02-23 19:55:23,787 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-23 19:55:23,787 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-23 19:55:23,789 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-23 19:55:23,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-23 19:55:23,793 INFO L732 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] [2022-02-23 19:55:23,795 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-23 19:55:23,796 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 07:55:23 BasicIcfg [2022-02-23 19:55:23,796 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-23 19:55:23,797 INFO L158 Benchmark]: Toolchain (without parser) took 13830.31ms. Allocated memory was 198.2MB in the beginning and 6.0GB in the end (delta: 5.8GB). Free memory was 142.9MB in the beginning and 4.8GB in the end (delta: -4.6GB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-02-23 19:55:23,797 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 198.2MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. [2022-02-23 19:55:23,797 INFO L158 Benchmark]: CACSL2BoogieTranslator took 222.08ms. Allocated memory was 198.2MB in the beginning and 276.8MB in the end (delta: 78.6MB). Free memory was 142.6MB in the beginning and 247.4MB in the end (delta: -104.7MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. [2022-02-23 19:55:23,797 INFO L158 Benchmark]: Boogie Preprocessor took 22.33ms. Allocated memory is still 276.8MB. Free memory was 247.4MB in the beginning and 245.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-23 19:55:23,797 INFO L158 Benchmark]: RCFGBuilder took 324.01ms. Allocated memory is still 276.8MB. Free memory was 245.6MB in the beginning and 232.6MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-02-23 19:55:23,798 INFO L158 Benchmark]: IcfgTransformer took 29.73ms. Allocated memory is still 276.8MB. Free memory was 232.6MB in the beginning and 231.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-02-23 19:55:23,798 INFO L158 Benchmark]: TraceAbstraction took 13225.75ms. Allocated memory was 276.8MB in the beginning and 6.0GB in the end (delta: 5.8GB). Free memory was 230.6MB in the beginning and 4.8GB in the end (delta: -4.6GB). Peak memory consumption was 1.2GB. Max. memory is 8.0GB. [2022-02-23 19:55:23,798 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 198.2MB. Free memory is still 159.7MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 222.08ms. Allocated memory was 198.2MB in the beginning and 276.8MB in the end (delta: 78.6MB). Free memory was 142.6MB in the beginning and 247.4MB in the end (delta: -104.7MB). Peak memory consumption was 9.9MB. Max. memory is 8.0GB. * Boogie Preprocessor took 22.33ms. Allocated memory is still 276.8MB. Free memory was 247.4MB in the beginning and 245.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 324.01ms. Allocated memory is still 276.8MB. Free memory was 245.6MB in the beginning and 232.6MB in the end (delta: 13.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * IcfgTransformer took 29.73ms. Allocated memory is still 276.8MB. Free memory was 232.6MB in the beginning and 231.3MB in the end (delta: 1.4MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * TraceAbstraction took 13225.75ms. Allocated memory was 276.8MB in the beginning and 6.0GB in the end (delta: 5.8GB). Free memory was 230.6MB in the beginning and 4.8GB in the end (delta: -4.6GB). Peak memory consumption was 1.2GB. 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: 191]: 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, 51 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 13.2s, OverallIterations: 35, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.4s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5376 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5376 mSDsluCounter, 3785 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 247 mSDsCounter, 82 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2492 IncrementalHoareTripleChecker+Invalid, 2574 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 82 mSolverCounterUnsat, 3538 mSDtfsCounter, 2492 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 245 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=106505occurred in iteration=34, InterpolantAutomatonStates: 140, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 6.2s AutomataMinimizationTime, 35 MinimizatonAttempts, 16422 StatesRemovedByMinimization, 34 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 1003 NumberOfCodeBlocks, 1003 NumberOfCodeBlocksAsserted, 35 NumberOfCheckSat, 968 ConstructedInterpolants, 0 QuantifiedInterpolants, 2174 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 35 InterpolantComputations, 35 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! [2022-02-23 19:55:23,825 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...