/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/loop-simple/nested_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 18:04:40,867 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 18:04:40,893 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 18:04:40,927 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 18:04:40,956 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 18:04:40,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 18:04:40,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 18:04:40,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 18:04:40,966 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 18:04:40,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 18:04:40,967 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 18:04:40,968 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 18:04:40,968 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 18:04:40,968 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 18:04:40,968 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 18:04:40,968 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 18:04:40,968 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 18:04:40,968 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 18:04:40,969 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 18:04:40,969 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 18:04:40,969 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 18:04:40,969 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 18:04:40,969 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 18:04:40,969 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 18:04:40,970 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 18:04:40,970 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 18:04:40,970 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:04:40,970 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 18:04:40,970 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 18:04:40,976 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 18:04:40,976 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 18:04:41,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 18:04:41,262 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 18:04:41,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 18:04:41,265 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 18:04:41,266 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 18:04:41,268 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-simple/nested_5.c [2022-03-18 18:04:41,330 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75620582/6c2d9174ae03475e81b299245b47d9ed/FLAGb49ffef97 [2022-03-18 18:04:41,733 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 18:04:41,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c [2022-03-18 18:04:41,740 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75620582/6c2d9174ae03475e81b299245b47d9ed/FLAGb49ffef97 [2022-03-18 18:04:42,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e75620582/6c2d9174ae03475e81b299245b47d9ed [2022-03-18 18:04:42,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 18:04:42,137 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 18:04:42,139 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 18:04:42,139 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 18:04:42,142 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 18:04:42,143 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,144 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21b65928 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42, skipping insertion in model container [2022-03-18 18:04:42,144 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,151 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 18:04:42,163 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 18:04:42,376 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c[899,912] [2022-03-18 18:04:42,383 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:04:42,392 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 18:04:42,413 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-simple/nested_5.c[899,912] [2022-03-18 18:04:42,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 18:04:42,424 INFO L208 MainTranslator]: Completed translation [2022-03-18 18:04:42,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42 WrapperNode [2022-03-18 18:04:42,425 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 18:04:42,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 18:04:42,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 18:04:42,428 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 18:04:42,436 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,437 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,443 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,459 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,464 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,468 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 18:04:42,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 18:04:42,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 18:04:42,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 18:04:42,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 18:04:42,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:42,500 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 18:04:42,525 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 18:04:42,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 18:04:42,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 18:04:42,541 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 18:04:42,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 18:04:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 18:04:42,541 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 18:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 18:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 18:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 18:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 18:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 18:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 18:04:42,542 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 18:04:42,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 18:04:42,604 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 18:04:42,607 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 18:04:42,740 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 18:04:42,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 18:04:42,745 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-03-18 18:04:42,756 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:04:42 BoogieIcfgContainer [2022-03-18 18:04:42,756 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 18:04:42,759 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 18:04:42,760 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 18:04:42,763 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 18:04:42,765 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:04:42" (1/1) ... [2022-03-18 18:04:42,785 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:04:42 BasicIcfg [2022-03-18 18:04:42,785 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 18:04:42,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 18:04:42,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 18:04:42,808 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 18:04:42,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 06:04:42" (1/4) ... [2022-03-18 18:04:42,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6860e272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:04:42, skipping insertion in model container [2022-03-18 18:04:42,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 06:04:42" (2/4) ... [2022-03-18 18:04:42,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6860e272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 06:04:42, skipping insertion in model container [2022-03-18 18:04:42,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 06:04:42" (3/4) ... [2022-03-18 18:04:42,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6860e272 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 06:04:42, skipping insertion in model container [2022-03-18 18:04:42,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 06:04:42" (4/4) ... [2022-03-18 18:04:42,811 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_5.cJordan [2022-03-18 18:04:42,815 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 18:04:42,815 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 18:04:42,856 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 18:04:42,862 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 18:04:42,862 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 18:04:42,875 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-03-18 18:04:42,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-18 18:04:42,881 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:42,882 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:42,882 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:42,887 INFO L85 PathProgramCache]: Analyzing trace with hash 2087165565, now seen corresponding path program 1 times [2022-03-18 18:04:42,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:42,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925934474] [2022-03-18 18:04:42,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:42,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:42,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:43,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:43,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:43,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925934474] [2022-03-18 18:04:43,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925934474] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:43,021 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:04:43,021 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 18:04:43,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996873078] [2022-03-18 18:04:43,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:43,027 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 18:04:43,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:43,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 18:04:43,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 18:04:43,054 INFO L87 Difference]: Start difference. First operand has 24 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:43,095 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2022-03-18 18:04:43,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 18:04:43,102 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-18 18:04:43,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:43,108 INFO L225 Difference]: With dead ends: 24 [2022-03-18 18:04:43,108 INFO L226 Difference]: Without dead ends: 19 [2022-03-18 18:04:43,109 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 18:04:43,112 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:43,113 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 31 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-18 18:04:43,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-18 18:04:43,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2022-03-18 18:04:43,140 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 9 [2022-03-18 18:04:43,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:43,140 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2022-03-18 18:04:43,140 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,140 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2022-03-18 18:04:43,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-03-18 18:04:43,141 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:43,141 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:43,141 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 18:04:43,141 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:43,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:43,142 INFO L85 PathProgramCache]: Analyzing trace with hash 2087166526, now seen corresponding path program 1 times [2022-03-18 18:04:43,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:43,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388258955] [2022-03-18 18:04:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:43,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:43,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:43,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:43,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:43,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388258955] [2022-03-18 18:04:43,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388258955] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:43,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:04:43,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 18:04:43,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661086744] [2022-03-18 18:04:43,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:43,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 18:04:43,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:43,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 18:04:43,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 18:04:43,205 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:43,257 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-03-18 18:04:43,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 18:04:43,258 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2022-03-18 18:04:43,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:43,260 INFO L225 Difference]: With dead ends: 29 [2022-03-18 18:04:43,260 INFO L226 Difference]: Without dead ends: 29 [2022-03-18 18:04:43,262 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:04:43,263 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 44 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:43,263 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:43,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-18 18:04:43,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2022-03-18 18:04:43,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2022-03-18 18:04:43,273 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 9 [2022-03-18 18:04:43,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:43,274 INFO L478 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2022-03-18 18:04:43,274 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,274 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2022-03-18 18:04:43,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-18 18:04:43,275 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:43,275 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:43,275 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-18 18:04:43,275 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:43,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:43,276 INFO L85 PathProgramCache]: Analyzing trace with hash 568010400, now seen corresponding path program 1 times [2022-03-18 18:04:43,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:43,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216660538] [2022-03-18 18:04:43,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:43,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:43,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:43,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:43,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216660538] [2022-03-18 18:04:43,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216660538] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:43,344 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:04:43,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 18:04:43,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903955963] [2022-03-18 18:04:43,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:43,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 18:04:43,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:43,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 18:04:43,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 18:04:43,346 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:43,401 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2022-03-18 18:04:43,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 18:04:43,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-03-18 18:04:43,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:43,402 INFO L225 Difference]: With dead ends: 28 [2022-03-18 18:04:43,403 INFO L226 Difference]: Without dead ends: 28 [2022-03-18 18:04:43,403 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:04:43,404 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 38 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:43,404 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-03-18 18:04:43,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2022-03-18 18:04:43,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2022-03-18 18:04:43,408 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 12 [2022-03-18 18:04:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:43,408 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2022-03-18 18:04:43,408 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2022-03-18 18:04:43,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-18 18:04:43,409 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:43,409 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:43,409 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-18 18:04:43,409 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:43,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:43,410 INFO L85 PathProgramCache]: Analyzing trace with hash -918082799, now seen corresponding path program 1 times [2022-03-18 18:04:43,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:43,410 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567092081] [2022-03-18 18:04:43,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:43,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:43,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:43,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:43,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:43,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567092081] [2022-03-18 18:04:43,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567092081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:43,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:04:43,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 18:04:43,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583416432] [2022-03-18 18:04:43,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:43,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 18:04:43,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:43,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 18:04:43,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 18:04:43,459 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:43,496 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2022-03-18 18:04:43,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 18:04:43,496 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-03-18 18:04:43,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:43,497 INFO L225 Difference]: With dead ends: 27 [2022-03-18 18:04:43,497 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 18:04:43,497 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:04:43,499 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:43,499 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:43,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 18:04:43,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-03-18 18:04:43,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2022-03-18 18:04:43,503 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 15 [2022-03-18 18:04:43,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:43,503 INFO L478 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2022-03-18 18:04:43,504 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,504 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2022-03-18 18:04:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-18 18:04:43,504 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:43,505 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:43,505 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-18 18:04:43,505 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1067555700, now seen corresponding path program 1 times [2022-03-18 18:04:43,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:43,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214591082] [2022-03-18 18:04:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:43,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:43,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:43,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214591082] [2022-03-18 18:04:43,571 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214591082] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:43,571 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:04:43,571 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 18:04:43,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6570312] [2022-03-18 18:04:43,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:43,572 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 18:04:43,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:43,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 18:04:43,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 18:04:43,573 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:43,613 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2022-03-18 18:04:43,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 18:04:43,614 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 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 18 [2022-03-18 18:04:43,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:43,617 INFO L225 Difference]: With dead ends: 26 [2022-03-18 18:04:43,617 INFO L226 Difference]: Without dead ends: 26 [2022-03-18 18:04:43,617 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:04:43,622 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:43,623 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-03-18 18:04:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-03-18 18:04:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-03-18 18:04:43,626 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 18 [2022-03-18 18:04:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:43,626 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-03-18 18:04:43,645 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,645 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-03-18 18:04:43,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-03-18 18:04:43,645 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:43,646 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:43,646 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-18 18:04:43,646 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:43,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:43,647 INFO L85 PathProgramCache]: Analyzing trace with hash -495476152, now seen corresponding path program 1 times [2022-03-18 18:04:43,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:43,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345843712] [2022-03-18 18:04:43,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:43,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:43,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:43,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:43,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345843712] [2022-03-18 18:04:43,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345843712] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 18:04:43,728 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 18:04:43,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 18:04:43,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563279406] [2022-03-18 18:04:43,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 18:04:43,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 18:04:43,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 18:04:43,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 18:04:43,731 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:43,773 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-03-18 18:04:43,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 18:04:43,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 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 21 [2022-03-18 18:04:43,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:43,776 INFO L225 Difference]: With dead ends: 25 [2022-03-18 18:04:43,776 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 18:04:43,777 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-18 18:04:43,779 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:43,780 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 28 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:43,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 18:04:43,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-03-18 18:04:43,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-03-18 18:04:43,787 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 21 [2022-03-18 18:04:43,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:43,787 INFO L478 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-03-18 18:04:43,787 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 3 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:43,788 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-03-18 18:04:43,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 18:04:43,788 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:43,788 INFO L500 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] [2022-03-18 18:04:43,789 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-18 18:04:43,789 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:43,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:43,789 INFO L85 PathProgramCache]: Analyzing trace with hash 1040068038, now seen corresponding path program 1 times [2022-03-18 18:04:43,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:43,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213384532] [2022-03-18 18:04:43,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:43,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:43,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:43,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,860 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:43,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:43,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213384532] [2022-03-18 18:04:43,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213384532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:43,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221905798] [2022-03-18 18:04:43,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:43,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:43,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:43,867 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:04:43,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 18:04:43,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:43,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 18:04:43,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:44,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:44,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:44,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221905798] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:44,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:44,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 8 [2022-03-18 18:04:44,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776975011] [2022-03-18 18:04:44,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:44,118 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 18:04:44,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:44,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 18:04:44,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-03-18 18:04:44,119 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:44,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:44,188 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-03-18 18:04:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 18:04:44,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-03-18 18:04:44,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:44,190 INFO L225 Difference]: With dead ends: 30 [2022-03-18 18:04:44,190 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 18:04:44,190 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2022-03-18 18:04:44,191 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 27 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:44,191 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 18:04:44,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 18:04:44,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-18 18:04:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:44,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-03-18 18:04:44,195 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 23 [2022-03-18 18:04:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:44,195 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-03-18 18:04:44,195 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-03-18 18:04:44,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 18:04:44,196 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:44,196 INFO L500 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:44,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:44,417 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:44,418 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:44,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:44,418 INFO L85 PathProgramCache]: Analyzing trace with hash -758389952, now seen corresponding path program 2 times [2022-03-18 18:04:44,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:44,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082457752] [2022-03-18 18:04:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:44,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:44,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-18 18:04:44,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:44,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082457752] [2022-03-18 18:04:44,471 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082457752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:44,472 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977185664] [2022-03-18 18:04:44,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 18:04:44,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:44,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:44,473 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:04:44,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 18:04:44,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 18:04:44,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:04:44,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 18:04:44,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:44,613 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:44,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 18:04:44,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977185664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:44,686 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:44,686 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 11 [2022-03-18 18:04:44,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420914693] [2022-03-18 18:04:44,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:44,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 18:04:44,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:44,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 18:04:44,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-18 18:04:44,689 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:44,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:44,999 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2022-03-18 18:04:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 18:04:44,999 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-03-18 18:04:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:45,000 INFO L225 Difference]: With dead ends: 63 [2022-03-18 18:04:45,000 INFO L226 Difference]: Without dead ends: 63 [2022-03-18 18:04:45,001 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-03-18 18:04:45,001 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 77 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:45,002 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 46 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:04:45,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-18 18:04:45,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 49. [2022-03-18 18:04:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 45 states have internal predecessors, (51), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-03-18 18:04:45,006 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 29 [2022-03-18 18:04:45,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:45,006 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-03-18 18:04:45,007 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:45,007 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-03-18 18:04:45,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-18 18:04:45,008 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:45,008 INFO L500 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:45,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:45,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-03-18 18:04:45,224 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:45,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:45,224 INFO L85 PathProgramCache]: Analyzing trace with hash 329949812, now seen corresponding path program 3 times [2022-03-18 18:04:45,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:45,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528823677] [2022-03-18 18:04:45,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:45,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:45,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:45,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:45,286 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-03-18 18:04:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:45,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528823677] [2022-03-18 18:04:45,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528823677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:45,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18972193] [2022-03-18 18:04:45,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 18:04:45,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:45,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:45,288 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:04:45,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 18:04:45,320 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-18 18:04:45,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:04:45,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-03-18 18:04:45,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:45,427 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-18 18:04:45,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-03-18 18:04:45,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18972193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:45,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:45,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2022-03-18 18:04:45,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038560692] [2022-03-18 18:04:45,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:45,529 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 18:04:45,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:45,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 18:04:45,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-18 18:04:45,529 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:45,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:45,752 INFO L93 Difference]: Finished difference Result 426 states and 470 transitions. [2022-03-18 18:04:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 18:04:45,752 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-03-18 18:04:45,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:45,755 INFO L225 Difference]: With dead ends: 426 [2022-03-18 18:04:45,755 INFO L226 Difference]: Without dead ends: 426 [2022-03-18 18:04:45,755 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2022-03-18 18:04:45,756 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 331 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:45,756 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 36 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:04:45,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2022-03-18 18:04:45,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 298. [2022-03-18 18:04:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 294 states have (on average 1.1122448979591837) internal successors, (327), 294 states have internal predecessors, (327), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:45,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 330 transitions. [2022-03-18 18:04:45,773 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 330 transitions. Word has length 48 [2022-03-18 18:04:45,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:45,774 INFO L478 AbstractCegarLoop]: Abstraction has 298 states and 330 transitions. [2022-03-18 18:04:45,774 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.888888888888889) internal successors, (53), 8 states have internal predecessors, (53), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:45,774 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 330 transitions. [2022-03-18 18:04:45,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2022-03-18 18:04:45,778 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:45,778 INFO L500 BasicCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:45,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:45,993 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:45,993 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:45,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1503345398, now seen corresponding path program 4 times [2022-03-18 18:04:45,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:45,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991561871] [2022-03-18 18:04:45,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:45,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:46,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:46,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:46,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 4294 proven. 1 refuted. 0 times theorem prover too weak. 7021 trivial. 0 not checked. [2022-03-18 18:04:46,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:46,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991561871] [2022-03-18 18:04:46,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991561871] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:46,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651649368] [2022-03-18 18:04:46,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 18:04:46,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:46,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:46,160 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:04:46,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 18:04:46,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 18:04:46,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:04:46,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 18:04:46,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:46,768 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-03-18 18:04:46,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:47,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11316 backedges. 2493 proven. 89 refuted. 0 times theorem prover too weak. 8734 trivial. 0 not checked. [2022-03-18 18:04:47,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651649368] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:47,249 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:47,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2022-03-18 18:04:47,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346255539] [2022-03-18 18:04:47,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:47,251 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 18:04:47,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:47,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 18:04:47,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-03-18 18:04:47,252 INFO L87 Difference]: Start difference. First operand 298 states and 330 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:47,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:47,560 INFO L93 Difference]: Finished difference Result 2286 states and 2470 transitions. [2022-03-18 18:04:47,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 18:04:47,561 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 297 [2022-03-18 18:04:47,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:47,568 INFO L225 Difference]: With dead ends: 2286 [2022-03-18 18:04:47,569 INFO L226 Difference]: Without dead ends: 2286 [2022-03-18 18:04:47,569 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 621 GetRequests, 592 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2022-03-18 18:04:47,570 INFO L912 BasicCegarLoop]: 19 mSDtfsCounter, 266 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:47,570 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 36 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:04:47,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2286 states. [2022-03-18 18:04:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2286 to 1534. [2022-03-18 18:04:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1530 states have (on average 1.0816993464052287) internal successors, (1655), 1530 states have internal predecessors, (1655), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 1658 transitions. [2022-03-18 18:04:47,621 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 1658 transitions. Word has length 297 [2022-03-18 18:04:47,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:47,621 INFO L478 AbstractCegarLoop]: Abstraction has 1534 states and 1658 transitions. [2022-03-18 18:04:47,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 1658 transitions. [2022-03-18 18:04:47,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1534 [2022-03-18 18:04:47,673 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:47,674 INFO L500 BasicCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:47,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:47,887 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:47,888 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:47,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:47,888 INFO L85 PathProgramCache]: Analyzing trace with hash -651169602, now seen corresponding path program 5 times [2022-03-18 18:04:47,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:47,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474832254] [2022-03-18 18:04:47,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:47,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:48,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:48,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:48,891 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 88166 proven. 3149 refuted. 0 times theorem prover too weak. 311023 trivial. 0 not checked. [2022-03-18 18:04:48,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:48,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474832254] [2022-03-18 18:04:48,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474832254] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:48,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60417787] [2022-03-18 18:04:48,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 18:04:48,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:48,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:48,893 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:04:48,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 18:04:49,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2022-03-18 18:04:49,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:04:49,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 18:04:49,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:04:51,153 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-03-18 18:04:51,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:04:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 402338 backedges. 214134 proven. 3149 refuted. 0 times theorem prover too weak. 185055 trivial. 0 not checked. [2022-03-18 18:04:53,121 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60417787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:04:53,122 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:04:53,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 18:04:53,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188199711] [2022-03-18 18:04:53,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:04:53,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 18:04:53,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:04:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 18:04:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:04:53,125 INFO L87 Difference]: Start difference. First operand 1534 states and 1658 transitions. Second operand has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:53,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:04:53,256 INFO L93 Difference]: Finished difference Result 4510 states and 4858 transitions. [2022-03-18 18:04:53,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 18:04:53,257 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1533 [2022-03-18 18:04:53,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:04:53,271 INFO L225 Difference]: With dead ends: 4510 [2022-03-18 18:04:53,271 INFO L226 Difference]: Without dead ends: 4510 [2022-03-18 18:04:53,272 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 3078 GetRequests, 3064 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 18:04:53,272 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 116 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:04:53,273 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 48 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:04:53,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4510 states. [2022-03-18 18:04:53,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4510 to 4510. [2022-03-18 18:04:53,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4510 states, 4506 states have (on average 1.0774522858411009) internal successors, (4855), 4506 states have internal predecessors, (4855), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:53,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4510 states to 4510 states and 4858 transitions. [2022-03-18 18:04:53,358 INFO L78 Accepts]: Start accepts. Automaton has 4510 states and 4858 transitions. Word has length 1533 [2022-03-18 18:04:53,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:04:53,359 INFO L478 AbstractCegarLoop]: Abstraction has 4510 states and 4858 transitions. [2022-03-18 18:04:53,360 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.0) internal successors, (80), 9 states have internal predecessors, (80), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:04:53,360 INFO L276 IsEmpty]: Start isEmpty. Operand 4510 states and 4858 transitions. [2022-03-18 18:04:53,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4510 [2022-03-18 18:04:53,531 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:04:53,532 INFO L500 BasicCegarLoop]: trace histogram [1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:04:53,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 18:04:53,732 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 18:04:53,733 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:04:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:04:53,734 INFO L85 PathProgramCache]: Analyzing trace with hash -737065794, now seen corresponding path program 6 times [2022-03-18 18:04:53,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:04:53,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983019518] [2022-03-18 18:04:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:04:53,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:04:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:58,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:04:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:04:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359703 proven. 113309 refuted. 0 times theorem prover too weak. 2150622 trivial. 0 not checked. [2022-03-18 18:04:58,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:04:58,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983019518] [2022-03-18 18:04:58,888 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983019518] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:04:58,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290970742] [2022-03-18 18:04:58,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 18:04:58,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:04:58,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:04:58,889 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:04:58,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 18:05:04,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 753 check-sat command(s) [2022-03-18 18:05:04,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 18:05:04,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 5371 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-18 18:05:04,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:05:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-03-18 18:05:10,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:05:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3623634 backedges. 1359706 proven. 113309 refuted. 0 times theorem prover too weak. 2150619 trivial. 0 not checked. [2022-03-18 18:05:14,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290970742] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:05:14,957 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:05:14,958 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-03-18 18:05:14,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512350159] [2022-03-18 18:05:14,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:05:14,964 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 18:05:14,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:05:14,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 18:05:14,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:05:14,965 INFO L87 Difference]: Start difference. First operand 4510 states and 4858 transitions. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:05:15,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:05:15,137 INFO L93 Difference]: Finished difference Result 13486 states and 14522 transitions. [2022-03-18 18:05:15,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 18:05:15,138 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 4509 [2022-03-18 18:05:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:05:15,180 INFO L225 Difference]: With dead ends: 13486 [2022-03-18 18:05:15,181 INFO L226 Difference]: Without dead ends: 13486 [2022-03-18 18:05:15,181 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 9030 GetRequests, 9016 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 18:05:15,182 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 128 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:05:15,182 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 43 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:05:15,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13486 states. [2022-03-18 18:05:15,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13486 to 13486. [2022-03-18 18:05:15,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13486 states, 13482 states have (on average 1.0769173713098947) internal successors, (14519), 13482 states have internal predecessors, (14519), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:05:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13486 states to 13486 states and 14522 transitions. [2022-03-18 18:05:15,400 INFO L78 Accepts]: Start accepts. Automaton has 13486 states and 14522 transitions. Word has length 4509 [2022-03-18 18:05:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:05:15,402 INFO L478 AbstractCegarLoop]: Abstraction has 13486 states and 14522 transitions. [2022-03-18 18:05:15,402 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 9 states have internal predecessors, (95), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:05:15,402 INFO L276 IsEmpty]: Start isEmpty. Operand 13486 states and 14522 transitions. [2022-03-18 18:05:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13486 [2022-03-18 18:05:16,592 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:05:16,595 INFO L500 BasicCegarLoop]: trace histogram [5184, 5184, 864, 864, 864, 144, 144, 144, 24, 24, 24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:05:16,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 18:05:16,795 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:05:16,796 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:05:16,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:05:16,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1057330878, now seen corresponding path program 7 times [2022-03-18 18:05:16,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:05:16,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376624624] [2022-03-18 18:05:16,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:05:16,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 18:05:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:06:13,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 18:06:13,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:06:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-18 18:06:14,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 18:06:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376624624] [2022-03-18 18:06:14,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376624624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 18:06:14,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635102018] [2022-03-18 18:06:14,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 18:06:14,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:06:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 18:06:15,008 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 18:06:15,009 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 18:06:18,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 18:06:18,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 21820 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-18 18:06:18,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 18:06:44,886 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-18 18:06:44,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 18:07:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 32625802 backedges. 0 proven. 24474406 refuted. 0 times theorem prover too weak. 8151396 trivial. 0 not checked. [2022-03-18 18:07:18,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635102018] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 18:07:18,326 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-18 18:07:18,329 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 10 [2022-03-18 18:07:18,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303097539] [2022-03-18 18:07:18,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-18 18:07:18,338 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 18:07:18,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 18:07:18,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 18:07:18,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-03-18 18:07:18,339 INFO L87 Difference]: Start difference. First operand 13486 states and 14522 transitions. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:07:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 18:07:18,504 INFO L93 Difference]: Finished difference Result 20224 states and 21778 transitions. [2022-03-18 18:07:18,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 18:07:18,505 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13485 [2022-03-18 18:07:18,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 18:07:18,573 INFO L225 Difference]: With dead ends: 20224 [2022-03-18 18:07:18,574 INFO L226 Difference]: Without dead ends: 20224 [2022-03-18 18:07:18,574 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 26984 GetRequests, 26969 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2022-03-18 18:07:18,576 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 161 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 18:07:18,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 33 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 18:07:18,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20224 states. [2022-03-18 18:07:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20224 to 20224. [2022-03-18 18:07:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20224 states, 20220 states have (on average 1.0769040553907023) internal successors, (21775), 20220 states have internal predecessors, (21775), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:07:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20224 states to 20224 states and 21778 transitions. [2022-03-18 18:07:18,872 INFO L78 Accepts]: Start accepts. Automaton has 20224 states and 21778 transitions. Word has length 13485 [2022-03-18 18:07:18,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 18:07:18,889 INFO L478 AbstractCegarLoop]: Abstraction has 20224 states and 21778 transitions. [2022-03-18 18:07:18,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 9 states have internal predecessors, (94), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-03-18 18:07:18,890 INFO L276 IsEmpty]: Start isEmpty. Operand 20224 states and 21778 transitions. [2022-03-18 18:07:21,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20224 [2022-03-18 18:07:21,195 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 18:07:21,199 INFO L500 BasicCegarLoop]: trace histogram [7776, 7776, 1296, 1296, 1296, 216, 216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 18:07:21,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 18:07:21,400 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 18:07:21,400 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 18:07:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 18:07:21,403 INFO L85 PathProgramCache]: Analyzing trace with hash 587167998, now seen corresponding path program 8 times [2022-03-18 18:07:21,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 18:07:21,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885618219] [2022-03-18 18:07:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 18:07:21,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms