/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/loops-crafted-1/Mono1_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 21:04:05,756 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 21:04:05,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 21:04:05,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 21:04:05,839 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 21:04:05,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 21:04:05,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 21:04:05,844 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 21:04:05,855 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 21:04:05,855 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 21:04:05,856 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 21:04:05,856 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 21:04:05,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 21:04:05,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 21:04:05,857 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 21:04:05,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 21:04:05,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 21:04:05,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 21:04:05,857 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 21:04:05,858 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 21:04:05,858 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 21:04:05,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 21:04:05,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 21:04:05,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 21:04:05,858 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 21:04:05,858 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 21:04:05,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:04:05,858 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 21:04:05,858 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 21:04:05,859 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 21:04:05,859 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 21:04:06,034 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 21:04:06,048 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 21:04:06,050 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 21:04:06,051 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 21:04:06,052 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 21:04:06,052 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2022-02-14 21:04:06,107 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928ea8712/c018c953e8ce4fcc90241e6a3e774255/FLAG5e7a1670c [2022-02-14 21:04:06,436 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 21:04:06,436 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c [2022-02-14 21:04:06,439 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928ea8712/c018c953e8ce4fcc90241e6a3e774255/FLAG5e7a1670c [2022-02-14 21:04:06,447 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/928ea8712/c018c953e8ce4fcc90241e6a3e774255 [2022-02-14 21:04:06,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 21:04:06,449 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 21:04:06,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 21:04:06,452 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 21:04:06,453 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 21:04:06,454 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,455 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ed67514 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06, skipping insertion in model container [2022-02-14 21:04:06,455 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,459 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 21:04:06,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 21:04:06,549 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c[313,326] [2022-02-14 21:04:06,559 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:04:06,575 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 21:04:06,582 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono1_1-2.c[313,326] [2022-02-14 21:04:06,583 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 21:04:06,591 INFO L208 MainTranslator]: Completed translation [2022-02-14 21:04:06,591 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06 WrapperNode [2022-02-14 21:04:06,591 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 21:04:06,592 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 21:04:06,592 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 21:04:06,592 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 21:04:06,598 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,603 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,603 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,608 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,610 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,613 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,614 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 21:04:06,615 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 21:04:06,615 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 21:04:06,615 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 21:04:06,616 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 21:04:06,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:04:06,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-14 21:04:06,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-14 21:04:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 21:04:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 21:04:06,671 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 21:04:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 21:04:06,672 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 21:04:06,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 21:04:06,710 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 21:04:06,711 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 21:04:06,772 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 21:04:06,776 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 21:04:06,776 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-14 21:04:06,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:04:06 BoogieIcfgContainer [2022-02-14 21:04:06,777 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 21:04:06,778 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 21:04:06,778 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 21:04:06,779 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 21:04:06,780 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:04:06" (1/1) ... [2022-02-14 21:04:06,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:04:06 BasicIcfg [2022-02-14 21:04:06,793 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 21:04:06,807 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 21:04:06,807 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 21:04:06,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 21:04:06,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:04:06" (1/4) ... [2022-02-14 21:04:06,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abb24c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:04:06, skipping insertion in model container [2022-02-14 21:04:06,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:04:06" (2/4) ... [2022-02-14 21:04:06,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abb24c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:04:06, skipping insertion in model container [2022-02-14 21:04:06,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:04:06" (3/4) ... [2022-02-14 21:04:06,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3abb24c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 09:04:06, skipping insertion in model container [2022-02-14 21:04:06,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 09:04:06" (4/4) ... [2022-02-14 21:04:06,811 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono1_1-2.cJordan [2022-02-14 21:04:06,814 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 21:04:06,814 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 21:04:06,876 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 21:04:06,894 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-02-14 21:04:06,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 21:04:06,904 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-14 21:04:06,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:04:06,917 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:04:06,917 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:04:06,918 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:04:06,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:04:06,921 INFO L85 PathProgramCache]: Analyzing trace with hash -756157467, now seen corresponding path program 1 times [2022-02-14 21:04:06,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:04:06,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126017421] [2022-02-14 21:04:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:04:06,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:04:07,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:07,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:04:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:07,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:07,066 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:04:07,066 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126017421] [2022-02-14 21:04:07,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126017421] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:04:07,067 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:04:07,067 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 21:04:07,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286477555] [2022-02-14 21:04:07,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:04:07,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 21:04:07,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:04:07,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 21:04:07,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 21:04:07,097 INFO L87 Difference]: Start difference. First operand has 19 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:04:07,126 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2022-02-14 21:04:07,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 21:04:07,128 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 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 11 [2022-02-14 21:04:07,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:04:07,133 INFO L225 Difference]: With dead ends: 19 [2022-02-14 21:04:07,134 INFO L226 Difference]: Without dead ends: 13 [2022-02-14 21:04:07,136 INFO L932 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 [2022-02-14 21:04:07,139 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 11 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:04:07,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 22 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:04:07,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2022-02-14 21:04:07,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2022-02-14 21:04:07,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.25) internal successors, (10), 8 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:07,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2022-02-14 21:04:07,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2022-02-14 21:04:07,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:04:07,158 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2022-02-14 21:04:07,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:07,158 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2022-02-14 21:04:07,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-14 21:04:07,159 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:04:07,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:04:07,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 21:04:07,159 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:04:07,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:04:07,160 INFO L85 PathProgramCache]: Analyzing trace with hash -755233946, now seen corresponding path program 1 times [2022-02-14 21:04:07,160 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:04:07,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136508294] [2022-02-14 21:04:07,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:04:07,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:04:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:07,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:04:07,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:07,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:07,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:04:07,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136508294] [2022-02-14 21:04:07,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136508294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 21:04:07,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 21:04:07,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 21:04:07,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799576241] [2022-02-14 21:04:07,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 21:04:07,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 21:04:07,251 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:04:07,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 21:04:07,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 21:04:07,251 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:07,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:04:07,279 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2022-02-14 21:04:07,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 21:04:07,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 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 11 [2022-02-14 21:04:07,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:04:07,280 INFO L225 Difference]: With dead ends: 15 [2022-02-14 21:04:07,280 INFO L226 Difference]: Without dead ends: 15 [2022-02-14 21:04:07,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-14 21:04:07,281 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:04:07,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:04:07,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-02-14 21:04:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-02-14 21:04:07,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:07,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2022-02-14 21:04:07,284 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2022-02-14 21:04:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:04:07,284 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2022-02-14 21:04:07,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:07,285 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2022-02-14 21:04:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-14 21:04:07,285 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:04:07,285 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:04:07,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-14 21:04:07,285 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:04:07,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:04:07,286 INFO L85 PathProgramCache]: Analyzing trace with hash 980092676, now seen corresponding path program 1 times [2022-02-14 21:04:07,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:04:07,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257497834] [2022-02-14 21:04:07,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:04:07,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:04:07,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:07,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:04:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:07,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:07,361 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:04:07,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257497834] [2022-02-14 21:04:07,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257497834] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:04:07,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610265055] [2022-02-14 21:04:07,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:04:07,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:04:07,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:04:07,365 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) [2022-02-14 21:04:07,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-14 21:04:07,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:07,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-14 21:04:07,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:04:07,474 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:07,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:04:07,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:07,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610265055] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:04:07,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:04:07,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 7] total 11 [2022-02-14 21:04:07,629 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237030934] [2022-02-14 21:04:07,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:04:07,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 21:04:07,630 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:04:07,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 21:04:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-02-14 21:04:07,631 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:07,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:04:07,728 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2022-02-14 21:04:07,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-14 21:04:07,728 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-14 21:04:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:04:07,729 INFO L225 Difference]: With dead ends: 18 [2022-02-14 21:04:07,730 INFO L226 Difference]: Without dead ends: 18 [2022-02-14 21:04:07,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-02-14 21:04:07,733 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 14 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:04:07,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 33 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:04:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-02-14 21:04:07,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-02-14 21:04:07,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:07,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-02-14 21:04:07,740 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-02-14 21:04:07,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:04:07,740 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-02-14 21:04:07,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.8) internal successors, (18), 9 states have internal predecessors, (18), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:07,741 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-02-14 21:04:07,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-14 21:04:07,741 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:04:07,741 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:04:07,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-02-14 21:04:07,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:04:07,956 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:04:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:04:07,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1575643231, now seen corresponding path program 1 times [2022-02-14 21:04:07,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:04:07,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939220857] [2022-02-14 21:04:07,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:04:07,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:04:07,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:08,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:04:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:08,018 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:04:08,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939220857] [2022-02-14 21:04:08,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939220857] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:04:08,019 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402159774] [2022-02-14 21:04:08,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:04:08,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:04:08,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:04:08,020 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) [2022-02-14 21:04:08,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-14 21:04:08,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:08,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2022-02-14 21:04:08,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:04:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:08,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:04:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:08,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402159774] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:04:08,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:04:08,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 11 [2022-02-14 21:04:08,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53554297] [2022-02-14 21:04:08,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:04:08,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-14 21:04:08,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:04:08,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-14 21:04:08,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-02-14 21:04:08,215 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:08,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:04:08,397 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2022-02-14 21:04:08,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 21:04:08,398 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-14 21:04:08,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:04:08,398 INFO L225 Difference]: With dead ends: 26 [2022-02-14 21:04:08,398 INFO L226 Difference]: Without dead ends: 26 [2022-02-14 21:04:08,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2022-02-14 21:04:08,399 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 21:04:08,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 29 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 21:04:08,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-14 21:04:08,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-02-14 21:04:08,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:08,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-02-14 21:04:08,402 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 17 [2022-02-14 21:04:08,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:04:08,402 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-02-14 21:04:08,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:08,403 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-02-14 21:04:08,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-14 21:04:08,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:04:08,403 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:04:08,423 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-14 21:04:08,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-02-14 21:04:08,616 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:04:08,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:04:08,616 INFO L85 PathProgramCache]: Analyzing trace with hash 109985751, now seen corresponding path program 2 times [2022-02-14 21:04:08,616 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:04:08,616 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972672933] [2022-02-14 21:04:08,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:04:08,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:04:08,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:08,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:04:08,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:08,725 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:08,725 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:04:08,725 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972672933] [2022-02-14 21:04:08,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972672933] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:04:08,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133988021] [2022-02-14 21:04:08,726 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 21:04:08,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:04:08,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:04:08,727 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) [2022-02-14 21:04:08,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-14 21:04:08,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-14 21:04:08,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:04:08,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 20 conjunts are in the unsatisfiable core [2022-02-14 21:04:08,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:04:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:08,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:04:09,107 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 21:04:09,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1133988021] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:04:09,108 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:04:09,108 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 13] total 23 [2022-02-14 21:04:09,108 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057593797] [2022-02-14 21:04:09,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:04:09,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-14 21:04:09,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:04:09,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-14 21:04:09,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2022-02-14 21:04:09,109 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:10,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:04:10,220 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-02-14 21:04:10,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-14 21:04:10,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-14 21:04:10,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:04:10,222 INFO L225 Difference]: With dead ends: 39 [2022-02-14 21:04:10,222 INFO L226 Difference]: Without dead ends: 36 [2022-02-14 21:04:10,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=311, Invalid=1095, Unknown=0, NotChecked=0, Total=1406 [2022-02-14 21:04:10,223 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 34 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-14 21:04:10,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 66 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-14 21:04:10,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-14 21:04:10,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-14 21:04:10,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 31 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-02-14 21:04:10,227 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 25 [2022-02-14 21:04:10,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:04:10,227 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-02-14 21:04:10,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:10,227 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-02-14 21:04:10,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-14 21:04:10,228 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:04:10,228 INFO L514 BasicCegarLoop]: trace histogram [12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:04:10,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-02-14 21:04:10,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:04:10,445 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:04:10,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:04:10,445 INFO L85 PathProgramCache]: Analyzing trace with hash 134643049, now seen corresponding path program 3 times [2022-02-14 21:04:10,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:04:10,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180214052] [2022-02-14 21:04:10,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:04:10,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:04:10,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:10,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:04:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:10,590 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 72 proven. 56 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 21:04:10,590 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:04:10,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180214052] [2022-02-14 21:04:10,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180214052] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:04:10,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166144139] [2022-02-14 21:04:10,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-14 21:04:10,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:04:10,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:04:10,592 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) [2022-02-14 21:04:10,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-14 21:04:10,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2022-02-14 21:04:10,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:04:10,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 19 conjunts are in the unsatisfiable core [2022-02-14 21:04:10,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:04:10,887 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-02-14 21:04:10,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:04:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-02-14 21:04:11,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166144139] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:04:11,323 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:04:11,323 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 12] total 27 [2022-02-14 21:04:11,323 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458602178] [2022-02-14 21:04:11,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:04:11,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-14 21:04:11,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:04:11,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-14 21:04:11,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-02-14 21:04:11,326 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:04:14,660 INFO L93 Difference]: Finished difference Result 57 states and 65 transitions. [2022-02-14 21:04:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-14 21:04:14,661 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-14 21:04:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:04:14,661 INFO L225 Difference]: With dead ends: 57 [2022-02-14 21:04:14,661 INFO L226 Difference]: Without dead ends: 54 [2022-02-14 21:04:14,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=563, Invalid=2089, Unknown=0, NotChecked=0, Total=2652 [2022-02-14 21:04:14,664 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 68 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-14 21:04:14,664 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 66 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-14 21:04:14,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-14 21:04:14,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2022-02-14 21:04:14,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 47 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-02-14 21:04:14,667 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 35 [2022-02-14 21:04:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:04:14,667 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-02-14 21:04:14,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1153846153846154) internal successors, (55), 25 states have internal predecessors, (55), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:14,667 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-02-14 21:04:14,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-14 21:04:14,668 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:04:14,668 INFO L514 BasicCegarLoop]: trace histogram [20, 12, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:04:14,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-02-14 21:04:14,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:04:14,872 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:04:14,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:04:14,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1228107086, now seen corresponding path program 4 times [2022-02-14 21:04:14,872 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:04:14,872 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877538568] [2022-02-14 21:04:14,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:04:14,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:04:14,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:15,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:04:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 207 proven. 72 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-02-14 21:04:15,010 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:04:15,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877538568] [2022-02-14 21:04:15,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877538568] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:04:15,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914318822] [2022-02-14 21:04:15,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-14 21:04:15,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:04:15,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:04:15,011 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) [2022-02-14 21:04:15,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-14 21:04:15,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-14 21:04:15,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:04:15,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-14 21:04:15,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:04:15,268 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 21:04:15,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:04:15,949 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 144 proven. 240 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-14 21:04:15,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914318822] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:04:15,949 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:04:15,949 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18, 19] total 37 [2022-02-14 21:04:15,949 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661314890] [2022-02-14 21:04:15,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:04:15,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-14 21:04:15,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:04:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-14 21:04:15,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=962, Unknown=0, NotChecked=0, Total=1332 [2022-02-14 21:04:15,951 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:04:40,536 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2022-02-14 21:04:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-14 21:04:40,537 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-14 21:04:40,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:04:40,537 INFO L225 Difference]: With dead ends: 86 [2022-02-14 21:04:40,538 INFO L226 Difference]: Without dead ends: 86 [2022-02-14 21:04:40,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 24.8s TimeCoverageRelationStatistics Valid=1061, Invalid=2845, Unknown=0, NotChecked=0, Total=3906 [2022-02-14 21:04:40,539 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-14 21:04:40,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 104 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-14 21:04:40,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-14 21:04:40,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-02-14 21:04:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 81 states have (on average 1.0987654320987654) internal successors, (89), 81 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:40,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-02-14 21:04:40,544 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 51 [2022-02-14 21:04:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:04:40,544 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-02-14 21:04:40,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 36 states have internal predecessors, (78), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:04:40,544 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-02-14 21:04:40,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-14 21:04:40,545 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:04:40,546 INFO L514 BasicCegarLoop]: trace histogram [37, 25, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:04:40,565 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-14 21:04:40,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:04:40,765 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:04:40,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:04:40,766 INFO L85 PathProgramCache]: Analyzing trace with hash 525547056, now seen corresponding path program 5 times [2022-02-14 21:04:40,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:04:40,766 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644379259] [2022-02-14 21:04:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:04:40,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:04:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:41,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:04:41,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:04:41,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 598 proven. 650 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-02-14 21:04:41,206 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:04:41,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644379259] [2022-02-14 21:04:41,206 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644379259] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:04:41,206 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827875791] [2022-02-14 21:04:41,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-14 21:04:41,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:04:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:04:41,207 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) [2022-02-14 21:04:41,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-14 21:04:49,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 38 check-sat command(s) [2022-02-14 21:04:49,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:04:49,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 66 conjunts are in the unsatisfiable core [2022-02-14 21:04:49,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:04:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 352 proven. 992 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-02-14 21:04:49,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:04:52,266 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 352 proven. 992 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-02-14 21:04:52,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827875791] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:04:52,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:04:52,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34, 35] total 69 [2022-02-14 21:04:52,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273672448] [2022-02-14 21:04:52,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:04:52,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-14 21:04:52,267 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:04:52,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-14 21:04:52,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1251, Invalid=3441, Unknown=0, NotChecked=0, Total=4692 [2022-02-14 21:04:52,269 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:05:17,628 WARN L228 SmtUtils]: Spent 10.63s on a formula simplification. DAG size of input: 230 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:05:51,019 WARN L228 SmtUtils]: Spent 10.44s on a formula simplification. DAG size of input: 223 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:06:27,480 WARN L228 SmtUtils]: Spent 8.57s on a formula simplification. DAG size of input: 216 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:07:08,118 WARN L228 SmtUtils]: Spent 8.19s on a formula simplification. DAG size of input: 209 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:07:47,415 WARN L228 SmtUtils]: Spent 8.09s on a formula simplification. DAG size of input: 202 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:08:24,544 WARN L228 SmtUtils]: Spent 6.99s on a formula simplification. DAG size of input: 195 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:08:52,044 WARN L228 SmtUtils]: Spent 6.97s on a formula simplification. DAG size of input: 188 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:09:52,434 WARN L228 SmtUtils]: Spent 5.10s on a formula simplification. DAG size of input: 174 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:10:25,305 WARN L228 SmtUtils]: Spent 5.67s on a formula simplification. DAG size of input: 167 DAG size of output: 16 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:16:05,170 WARN L228 SmtUtils]: Spent 33.91s on a formula simplification. DAG size of input: 233 DAG size of output: 23 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-02-14 21:16:05,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 21:16:05,226 INFO L93 Difference]: Finished difference Result 152 states and 159 transitions. [2022-02-14 21:16:05,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-14 21:16:05,227 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-02-14 21:16:05,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 21:16:05,228 INFO L225 Difference]: With dead ends: 152 [2022-02-14 21:16:05,228 INFO L226 Difference]: Without dead ends: 152 [2022-02-14 21:16:05,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1884 ImplicationChecksByTransitivity, 674.1s TimeCoverageRelationStatistics Valid=4274, Invalid=11960, Unknown=22, NotChecked=0, Total=16256 [2022-02-14 21:16:05,231 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 124 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1957 mSolverCounterSat, 499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 499 IncrementalHoareTripleChecker+Valid, 1957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-14 21:16:05,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 184 Invalid, 2456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [499 Valid, 1957 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-14 21:16:05,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-14 21:16:05,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-02-14 21:16:05,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.054421768707483) internal successors, (155), 147 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:16:05,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 159 transitions. [2022-02-14 21:16:05,237 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 159 transitions. Word has length 85 [2022-02-14 21:16:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 21:16:05,238 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 159 transitions. [2022-02-14 21:16:05,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0579710144927534) internal successors, (142), 68 states have internal predecessors, (142), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:16:05,238 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 159 transitions. [2022-02-14 21:16:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-02-14 21:16:05,240 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 21:16:05,240 INFO L514 BasicCegarLoop]: trace histogram [70, 58, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 21:16:05,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-02-14 21:16:05,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:16:05,448 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 21:16:05,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 21:16:05,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1736138738, now seen corresponding path program 6 times [2022-02-14 21:16:05,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 21:16:05,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648938414] [2022-02-14 21:16:05,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 21:16:05,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 21:16:05,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:16:06,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 21:16:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 21:16:06,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1357 proven. 3422 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2022-02-14 21:16:06,985 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 21:16:06,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648938414] [2022-02-14 21:16:06,988 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648938414] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 21:16:06,988 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889891507] [2022-02-14 21:16:06,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-02-14 21:16:06,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 21:16:06,988 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 21:16:06,989 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) [2022-02-14 21:16:06,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-14 21:16:27,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 51 check-sat command(s) [2022-02-14 21:16:27,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 21:16:27,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 68 conjunts are in the unsatisfiable core [2022-02-14 21:16:27,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 21:16:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 2022 proven. 984 refuted. 0 times theorem prover too weak. 1894 trivial. 0 not checked. [2022-02-14 21:16:29,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 21:16:31,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 1450 proven. 144 refuted. 0 times theorem prover too weak. 3306 trivial. 0 not checked. [2022-02-14 21:16:31,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889891507] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 21:16:31,559 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 21:16:31,559 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 28, 19] total 105 [2022-02-14 21:16:31,559 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608066082] [2022-02-14 21:16:31,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 21:16:31,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-14 21:16:31,559 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 21:16:31,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-14 21:16:31,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2717, Invalid=8203, Unknown=0, NotChecked=0, Total=10920 [2022-02-14 21:16:31,562 INFO L87 Difference]: Start difference. First operand 152 states and 159 transitions. Second operand has 105 states, 104 states have (on average 2.0384615384615383) internal successors, (212), 103 states have internal predecessors, (212), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-14 21:17:27,481 WARN L228 SmtUtils]: Spent 5.23s on a formula simplification. DAG size of input: 96 DAG size of output: 18 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)