/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/nla-digbench-scaling/dijkstra-u_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-14 22:07:30,070 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-14 22:07:30,072 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-14 22:07:30,110 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-14 22:07:30,130 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-14 22:07:30,131 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-14 22:07:30,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-14 22:07:30,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-14 22:07:30,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-14 22:07:30,134 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-14 22:07:30,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-14 22:07:30,146 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-14 22:07:30,151 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-14 22:07:30,155 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-14 22:07:30,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-14 22:07:30,157 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-14 22:07:30,165 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-14 22:07:30,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-14 22:07:30,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-14 22:07:30,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-14 22:07:30,177 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-02-14 22:07:30,189 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-14 22:07:30,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-14 22:07:30,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-14 22:07:30,191 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-14 22:07:30,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-14 22:07:30,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-14 22:07:30,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-14 22:07:30,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-14 22:07:30,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-14 22:07:30,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-14 22:07:30,192 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-14 22:07:30,192 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-14 22:07:30,193 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-14 22:07:30,193 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-14 22:07:30,193 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-14 22:07:30,193 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-14 22:07:30,193 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-14 22:07:30,193 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-14 22:07:30,193 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:07:30,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-14 22:07:30,194 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-14 22:07:30,195 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-14 22:07:30,195 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-14 22:07:30,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-14 22:07:30,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-14 22:07:30,468 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-14 22:07:30,469 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-14 22:07:30,471 INFO L275 PluginConnector]: CDTParser initialized [2022-02-14 22:07:30,472 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2022-02-14 22:07:30,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73cb18185/f4a2ee740b1f4cfaa533e9a53737ec79/FLAG9aa9c272d [2022-02-14 22:07:30,956 INFO L306 CDTParser]: Found 1 translation units. [2022-02-14 22:07:30,957 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c [2022-02-14 22:07:30,967 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73cb18185/f4a2ee740b1f4cfaa533e9a53737ec79/FLAG9aa9c272d [2022-02-14 22:07:30,982 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73cb18185/f4a2ee740b1f4cfaa533e9a53737ec79 [2022-02-14 22:07:30,985 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-14 22:07:30,987 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-14 22:07:30,991 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-14 22:07:30,991 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-14 22:07:30,994 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-14 22:07:30,995 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:07:30" (1/1) ... [2022-02-14 22:07:30,995 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a0de87d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:30, skipping insertion in model container [2022-02-14 22:07:30,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 10:07:30" (1/1) ... [2022-02-14 22:07:31,002 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-14 22:07:31,025 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-14 22:07:31,221 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2022-02-14 22:07:31,263 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:07:31,269 INFO L203 MainTranslator]: Completed pre-run [2022-02-14 22:07:31,280 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/dijkstra-u_unwindbound100.c[525,538] [2022-02-14 22:07:31,308 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-14 22:07:31,318 INFO L208 MainTranslator]: Completed translation [2022-02-14 22:07:31,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:31 WrapperNode [2022-02-14 22:07:31,318 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-14 22:07:31,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-14 22:07:31,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-14 22:07:31,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-14 22:07:31,332 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:31" (1/1) ... [2022-02-14 22:07:31,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:31" (1/1) ... [2022-02-14 22:07:31,347 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:31" (1/1) ... [2022-02-14 22:07:31,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:31" (1/1) ... [2022-02-14 22:07:31,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:31" (1/1) ... [2022-02-14 22:07:31,357 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:31" (1/1) ... [2022-02-14 22:07:31,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:31" (1/1) ... [2022-02-14 22:07:31,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-14 22:07:31,360 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-14 22:07:31,360 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-14 22:07:31,360 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-14 22:07:31,363 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:31" (1/1) ... [2022-02-14 22:07:31,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-14 22:07:31,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:31,392 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 22:07:31,418 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 22:07:31,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-14 22:07:31,431 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-14 22:07:31,431 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-14 22:07:31,431 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-14 22:07:31,432 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-14 22:07:31,432 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-14 22:07:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-14 22:07:31,432 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-14 22:07:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-14 22:07:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-14 22:07:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-14 22:07:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-14 22:07:31,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-14 22:07:31,434 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-14 22:07:31,434 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-14 22:07:31,434 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-14 22:07:31,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-14 22:07:31,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-14 22:07:31,436 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-14 22:07:31,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-14 22:07:31,493 INFO L234 CfgBuilder]: Building ICFG [2022-02-14 22:07:31,494 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-14 22:07:31,645 INFO L275 CfgBuilder]: Performing block encoding [2022-02-14 22:07:31,650 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-14 22:07:31,650 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-14 22:07:31,668 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:07:31 BoogieIcfgContainer [2022-02-14 22:07:31,668 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-14 22:07:31,669 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-14 22:07:31,669 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-14 22:07:31,669 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-14 22:07:31,672 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:07:31" (1/1) ... [2022-02-14 22:07:31,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:07:31 BasicIcfg [2022-02-14 22:07:31,720 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-14 22:07:31,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-14 22:07:31,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-14 22:07:31,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-14 22:07:31,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 10:07:30" (1/4) ... [2022-02-14 22:07:31,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3becc505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:07:31, skipping insertion in model container [2022-02-14 22:07:31,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 10:07:31" (2/4) ... [2022-02-14 22:07:31,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3becc505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 10:07:31, skipping insertion in model container [2022-02-14 22:07:31,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 10:07:31" (3/4) ... [2022-02-14 22:07:31,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3becc505 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.02 10:07:31, skipping insertion in model container [2022-02-14 22:07:31,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 14.02 10:07:31" (4/4) ... [2022-02-14 22:07:31,726 INFO L111 eAbstractionObserver]: Analyzing ICFG dijkstra-u_unwindbound100.cJordan [2022-02-14 22:07:31,730 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-02-14 22:07:31,730 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-14 22:07:31,758 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-14 22:07:31,763 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 22:07:31,763 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-14 22:07:31,774 INFO L276 IsEmpty]: Start isEmpty. Operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-14 22:07:31,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-14 22:07:31,779 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:31,780 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:31,780 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:31,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:31,785 INFO L85 PathProgramCache]: Analyzing trace with hash -460462115, now seen corresponding path program 1 times [2022-02-14 22:07:31,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:31,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46167802] [2022-02-14 22:07:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:31,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:31,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:31,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:07:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:31,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:07:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:31,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:07:31,925 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:31,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46167802] [2022-02-14 22:07:31,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46167802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:07:31,926 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:07:31,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-14 22:07:31,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476259999] [2022-02-14 22:07:31,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:07:31,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-14 22:07:31,932 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:31,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-14 22:07:31,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-14 22:07:31,959 INFO L87 Difference]: Start difference. First operand has 39 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 22 states have internal predecessors, (31), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 22:07:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:32,170 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2022-02-14 22:07:32,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-14 22:07:32,173 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-02-14 22:07:32,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:32,178 INFO L225 Difference]: With dead ends: 40 [2022-02-14 22:07:32,178 INFO L226 Difference]: Without dead ends: 35 [2022-02-14 22:07:32,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 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 22:07:32,182 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:32,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 53 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-14 22:07:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-14 22:07:32,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-02-14 22:07:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 22:07:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 46 transitions. [2022-02-14 22:07:32,213 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 46 transitions. Word has length 18 [2022-02-14 22:07:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:32,213 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 46 transitions. [2022-02-14 22:07:32,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 22:07:32,214 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 46 transitions. [2022-02-14 22:07:32,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-14 22:07:32,215 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:32,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:32,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-14 22:07:32,215 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:32,216 INFO L85 PathProgramCache]: Analyzing trace with hash -889932734, now seen corresponding path program 1 times [2022-02-14 22:07:32,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:32,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861787517] [2022-02-14 22:07:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:32,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:32,239 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:07:32,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840902008] [2022-02-14 22:07:32,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:32,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:32,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:32,245 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 22:07:32,246 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 22:07:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:32,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-14 22:07:32,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:07:32,424 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 22:07:32,424 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:07:32,425 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:32,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861787517] [2022-02-14 22:07:32,426 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:07:32,430 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840902008] [2022-02-14 22:07:32,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840902008] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:07:32,432 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:07:32,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-14 22:07:32,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067736874] [2022-02-14 22:07:32,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:07:32,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-14 22:07:32,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:32,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-14 22:07:32,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:07:32,436 INFO L87 Difference]: Start difference. First operand 34 states and 46 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 22:07:32,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:32,456 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2022-02-14 22:07:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-14 22:07:32,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-02-14 22:07:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:32,458 INFO L225 Difference]: With dead ends: 36 [2022-02-14 22:07:32,458 INFO L226 Difference]: Without dead ends: 36 [2022-02-14 22:07:32,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-14 22:07:32,459 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:32,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 119 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:07:32,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-14 22:07:32,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-14 22:07:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 22:07:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 48 transitions. [2022-02-14 22:07:32,467 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 48 transitions. Word has length 20 [2022-02-14 22:07:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:32,467 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 48 transitions. [2022-02-14 22:07:32,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 22:07:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 48 transitions. [2022-02-14 22:07:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-14 22:07:32,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:32,468 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:32,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-14 22:07:32,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:32,669 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:32,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:32,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1699853977, now seen corresponding path program 1 times [2022-02-14 22:07:32,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:32,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572784285] [2022-02-14 22:07:32,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:32,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:32,687 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:07:32,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1331093638] [2022-02-14 22:07:32,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:32,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:32,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:32,694 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 22:07:32,695 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 22:07:32,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:07:32,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:07:32,790 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 22:07:32,791 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:07:32,791 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:32,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572784285] [2022-02-14 22:07:32,791 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:07:32,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331093638] [2022-02-14 22:07:32,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1331093638] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:07:32,792 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:07:32,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:07:32,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616005920] [2022-02-14 22:07:32,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:07:32,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:07:32,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:32,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:07:32,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:07:32,793 INFO L87 Difference]: Start difference. First operand 36 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 22:07:32,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:32,813 INFO L93 Difference]: Finished difference Result 40 states and 53 transitions. [2022-02-14 22:07:32,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:07:32,813 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-02-14 22:07:32,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:32,814 INFO L225 Difference]: With dead ends: 40 [2022-02-14 22:07:32,814 INFO L226 Difference]: Without dead ends: 40 [2022-02-14 22:07:32,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:07:32,816 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:32,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 120 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:07:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-14 22:07:32,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-02-14 22:07:32,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-02-14 22:07:32,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 52 transitions. [2022-02-14 22:07:32,822 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 52 transitions. Word has length 21 [2022-02-14 22:07:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:32,823 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 52 transitions. [2022-02-14 22:07:32,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-14 22:07:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2022-02-14 22:07:32,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-14 22:07:32,824 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:32,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:32,850 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 22:07:33,046 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,SelfDestructingSolverStorable2 [2022-02-14 22:07:33,046 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:33,047 INFO L85 PathProgramCache]: Analyzing trace with hash 1700986035, now seen corresponding path program 1 times [2022-02-14 22:07:33,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:33,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171983722] [2022-02-14 22:07:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:33,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:33,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:33,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:07:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:33,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:07:33,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:33,297 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 22:07:33,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:33,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171983722] [2022-02-14 22:07:33,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171983722] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:07:33,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:07:33,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-14 22:07:33,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762009281] [2022-02-14 22:07:33,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:07:33,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-14 22:07:33,299 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:33,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-14 22:07:33,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-14 22:07:33,300 INFO L87 Difference]: Start difference. First operand 39 states and 52 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 22:07:36,088 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:07:39,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:07:41,265 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:07:43,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:07:45,273 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:07:45,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:45,303 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2022-02-14 22:07:45,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-14 22:07:45,303 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 21 [2022-02-14 22:07:45,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:45,305 INFO L225 Difference]: With dead ends: 53 [2022-02-14 22:07:45,305 INFO L226 Difference]: Without dead ends: 51 [2022-02-14 22:07:45,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-14 22:07:45,306 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 24 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 37 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:45,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 148 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 163 Invalid, 5 Unknown, 0 Unchecked, 11.9s Time] [2022-02-14 22:07:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-02-14 22:07:45,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-02-14 22:07:45,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 29 states have internal predecessors, (34), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 22:07:45,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2022-02-14 22:07:45,315 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 21 [2022-02-14 22:07:45,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:45,316 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2022-02-14 22:07:45,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 22:07:45,316 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2022-02-14 22:07:45,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-14 22:07:45,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:45,317 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:45,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-14 22:07:45,317 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:45,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:45,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1908885951, now seen corresponding path program 1 times [2022-02-14 22:07:45,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:45,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935114220] [2022-02-14 22:07:45,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:45,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:45,329 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:07:45,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1995368011] [2022-02-14 22:07:45,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:45,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:45,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:45,331 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 22:07:45,344 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 22:07:45,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:45,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:07:45,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:07:45,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:07:45,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:07:45,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:07:45,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:45,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935114220] [2022-02-14 22:07:45,578 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:07:45,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995368011] [2022-02-14 22:07:45,579 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995368011] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:07:45,579 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:07:45,579 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-14 22:07:45,579 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933148784] [2022-02-14 22:07:45,579 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:07:45,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-14 22:07:45,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:45,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-14 22:07:45,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-14 22:07:45,581 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 22:07:46,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:07:46,957 INFO L93 Difference]: Finished difference Result 85 states and 114 transitions. [2022-02-14 22:07:46,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-14 22:07:46,958 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 23 [2022-02-14 22:07:46,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:07:46,959 INFO L225 Difference]: With dead ends: 85 [2022-02-14 22:07:46,959 INFO L226 Difference]: Without dead ends: 85 [2022-02-14 22:07:46,960 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-14 22:07:46,960 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 76 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-14 22:07:46,961 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 177 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-14 22:07:46,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-14 22:07:46,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 63. [2022-02-14 22:07:46,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 38 states have (on average 1.263157894736842) internal successors, (48), 40 states have internal predecessors, (48), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-02-14 22:07:46,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 83 transitions. [2022-02-14 22:07:46,970 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 83 transitions. Word has length 23 [2022-02-14 22:07:46,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:07:46,970 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 83 transitions. [2022-02-14 22:07:46,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 22:07:46,971 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 83 transitions. [2022-02-14 22:07:46,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-14 22:07:46,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:07:46,971 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:07:46,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-14 22:07:47,179 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 22:07:47,181 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:07:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:07:47,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1731080004, now seen corresponding path program 1 times [2022-02-14 22:07:47,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:07:47,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906197596] [2022-02-14 22:07:47,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:47,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:07:47,192 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:07:47,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [105220626] [2022-02-14 22:07:47,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:07:47,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:07:47,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:07:47,194 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 22:07:47,221 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 22:07:47,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:07:47,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:07:47,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:07:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:07:47,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:07:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:07:47,404 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:07:47,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906197596] [2022-02-14 22:07:47,405 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:07:47,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105220626] [2022-02-14 22:07:47,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105220626] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:07:47,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-14 22:07:47,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-02-14 22:07:47,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082047606] [2022-02-14 22:07:47,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-14 22:07:47,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-14 22:07:47,407 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:07:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-14 22:07:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-02-14 22:07:47,408 INFO L87 Difference]: Start difference. First operand 63 states and 83 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 22:07:50,166 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:07:52,322 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:07:54,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:07:56,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:00,388 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.38s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:08:02,101 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:04,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:06,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:08:06,135 INFO L93 Difference]: Finished difference Result 129 states and 178 transitions. [2022-02-14 22:08:06,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 22:08:06,136 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 24 [2022-02-14 22:08:06,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:08:06,137 INFO L225 Difference]: With dead ends: 129 [2022-02-14 22:08:06,137 INFO L226 Difference]: Without dead ends: 129 [2022-02-14 22:08:06,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2022-02-14 22:08:06,138 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 144 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 59 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-02-14 22:08:06,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 334 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 126 Invalid, 6 Unknown, 0 Unchecked, 18.7s Time] [2022-02-14 22:08:06,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-14 22:08:06,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2022-02-14 22:08:06,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 70 states have internal predecessors, (87), 46 states have call successors, (46), 9 states have call predecessors, (46), 8 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-02-14 22:08:06,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 173 transitions. [2022-02-14 22:08:06,167 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 173 transitions. Word has length 24 [2022-02-14 22:08:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:08:06,167 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 173 transitions. [2022-02-14 22:08:06,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-14 22:08:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 173 transitions. [2022-02-14 22:08:06,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-14 22:08:06,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:08:06,170 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:08:06,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-14 22:08:06,383 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 22:08:06,383 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:08:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:08:06,384 INFO L85 PathProgramCache]: Analyzing trace with hash -1729947946, now seen corresponding path program 1 times [2022-02-14 22:08:06,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:08:06,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315383561] [2022-02-14 22:08:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:08:06,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:08:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:06,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:08:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:06,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:08:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:06,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:08:06,623 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:08:06,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315383561] [2022-02-14 22:08:06,623 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315383561] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:08:06,623 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726842480] [2022-02-14 22:08:06,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:08:06,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:08:06,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:08:06,628 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 22:08:06,632 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 22:08:06,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:06,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-14 22:08:06,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:08:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:08:06,826 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:08:06,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:08:06,975 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726842480] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:08:06,975 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 22:08:06,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 15 [2022-02-14 22:08:06,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853955706] [2022-02-14 22:08:06,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 22:08:06,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 22:08:06,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:08:06,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 22:08:06,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-02-14 22:08:06,977 INFO L87 Difference]: Start difference. First operand 120 states and 173 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 22:08:10,185 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:13,551 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:08:15,568 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:19,179 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:21,907 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.04s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:08:25,213 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:27,380 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:29,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:31,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:08:31,225 INFO L93 Difference]: Finished difference Result 185 states and 269 transitions. [2022-02-14 22:08:31,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-14 22:08:31,227 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2022-02-14 22:08:31,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:08:31,228 INFO L225 Difference]: With dead ends: 185 [2022-02-14 22:08:31,228 INFO L226 Difference]: Without dead ends: 177 [2022-02-14 22:08:31,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2022-02-14 22:08:31,229 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 60 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 154 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 23.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.1s IncrementalHoareTripleChecker+Time [2022-02-14 22:08:31,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 276 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 420 Invalid, 7 Unknown, 0 Unchecked, 24.1s Time] [2022-02-14 22:08:31,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-02-14 22:08:31,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2022-02-14 22:08:31,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 100 states have internal predecessors, (118), 65 states have call successors, (65), 13 states have call predecessors, (65), 12 states have return successors, (57), 56 states have call predecessors, (57), 57 states have call successors, (57) [2022-02-14 22:08:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 240 transitions. [2022-02-14 22:08:31,245 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 240 transitions. Word has length 24 [2022-02-14 22:08:31,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:08:31,245 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 240 transitions. [2022-02-14 22:08:31,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 12 states have internal predecessors, (36), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 22:08:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 240 transitions. [2022-02-14 22:08:31,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-14 22:08:31,246 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:08:31,246 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:08:31,274 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 22:08:31,447 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 22:08:31,447 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:08:31,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:08:31,448 INFO L85 PathProgramCache]: Analyzing trace with hash -2026335537, now seen corresponding path program 1 times [2022-02-14 22:08:31,448 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:08:31,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453252627] [2022-02-14 22:08:31,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:08:31,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:08:31,463 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:08:31,463 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922094004] [2022-02-14 22:08:31,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:08:31,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:08:31,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:08:31,466 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 22:08:31,467 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 22:08:31,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:31,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 9 conjunts are in the unsatisfiable core [2022-02-14 22:08:31,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:08:31,697 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-14 22:08:31,698 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:08:31,698 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:08:31,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453252627] [2022-02-14 22:08:31,698 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:08:31,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922094004] [2022-02-14 22:08:31,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [922094004] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:08:31,698 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:08:31,698 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:08:31,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536140446] [2022-02-14 22:08:31,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:08:31,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:08:31,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:08:31,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:08:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:08:31,700 INFO L87 Difference]: Start difference. First operand 170 states and 240 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 22:08:33,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:08:33,195 INFO L93 Difference]: Finished difference Result 174 states and 242 transitions. [2022-02-14 22:08:33,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:08:33,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 31 [2022-02-14 22:08:33,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:08:33,200 INFO L225 Difference]: With dead ends: 174 [2022-02-14 22:08:33,200 INFO L226 Difference]: Without dead ends: 152 [2022-02-14 22:08:33,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:08:33,201 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-14 22:08:33,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 171 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-14 22:08:33,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-14 22:08:33,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-02-14 22:08:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 83 states have (on average 1.2891566265060241) internal successors, (107), 90 states have internal predecessors, (107), 58 states have call successors, (58), 11 states have call predecessors, (58), 10 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-14 22:08:33,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 216 transitions. [2022-02-14 22:08:33,212 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 216 transitions. Word has length 31 [2022-02-14 22:08:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:08:33,212 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 216 transitions. [2022-02-14 22:08:33,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 22:08:33,213 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 216 transitions. [2022-02-14 22:08:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-14 22:08:33,213 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:08:33,214 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:08:33,223 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 22:08:33,418 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 22:08:33,419 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:08:33,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:08:33,419 INFO L85 PathProgramCache]: Analyzing trace with hash -266035918, now seen corresponding path program 1 times [2022-02-14 22:08:33,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:08:33,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144286699] [2022-02-14 22:08:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:08:33,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:08:33,431 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:08:33,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1605304768] [2022-02-14 22:08:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:08:33,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:08:33,432 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:08:33,440 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 22:08:33,441 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 22:08:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:33,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-14 22:08:33,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:08:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-02-14 22:08:33,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:08:33,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:08:33,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144286699] [2022-02-14 22:08:33,654 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-14 22:08:33,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605304768] [2022-02-14 22:08:33,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605304768] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:08:33,655 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-14 22:08:33,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-14 22:08:33,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035684384] [2022-02-14 22:08:33,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:08:33,655 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:08:33,655 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:08:33,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:08:33,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-14 22:08:33,657 INFO L87 Difference]: Start difference. First operand 152 states and 216 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 22:08:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:08:34,287 INFO L93 Difference]: Finished difference Result 176 states and 233 transitions. [2022-02-14 22:08:34,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:08:34,289 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2022-02-14 22:08:34,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:08:34,290 INFO L225 Difference]: With dead ends: 176 [2022-02-14 22:08:34,290 INFO L226 Difference]: Without dead ends: 173 [2022-02-14 22:08:34,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-14 22:08:34,291 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-14 22:08:34,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 172 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-14 22:08:34,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-14 22:08:34,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 166. [2022-02-14 22:08:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 94 states have (on average 1.1702127659574468) internal successors, (110), 98 states have internal predecessors, (110), 55 states have call successors, (55), 17 states have call predecessors, (55), 16 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2022-02-14 22:08:34,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 216 transitions. [2022-02-14 22:08:34,303 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 216 transitions. Word has length 34 [2022-02-14 22:08:34,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:08:34,303 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 216 transitions. [2022-02-14 22:08:34,303 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-02-14 22:08:34,303 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 216 transitions. [2022-02-14 22:08:34,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-14 22:08:34,304 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:08:34,304 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:08:34,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-14 22:08:34,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:08:34,509 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:08:34,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:08:34,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1209382940, now seen corresponding path program 1 times [2022-02-14 22:08:34,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:08:34,510 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690069371] [2022-02-14 22:08:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:08:34,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:08:34,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:34,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:08:34,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:34,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:08:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:34,615 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:08:34,615 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:08:34,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690069371] [2022-02-14 22:08:34,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690069371] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:08:34,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634659080] [2022-02-14 22:08:34,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:08:34,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:08:34,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:08:34,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:08:34,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-14 22:08:34,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:08:34,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-14 22:08:34,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:08:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:08:34,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-14 22:08:34,884 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:08:34,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634659080] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-14 22:08:34,884 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-02-14 22:08:34,884 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 15 [2022-02-14 22:08:34,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484391853] [2022-02-14 22:08:34,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-02-14 22:08:34,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-14 22:08:34,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:08:34,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-14 22:08:34,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2022-02-14 22:08:34,886 INFO L87 Difference]: Start difference. First operand 166 states and 216 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 22:08:37,447 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:39,000 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:08:41,017 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:43,492 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:08:45,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-02-14 22:08:47,035 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:52,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.93s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:08:58,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:03,188 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:08,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:13,399 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:18,515 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 5.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:24,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:26,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:28,631 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:30,642 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:34,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-02-14 22:09:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:09:36,760 INFO L93 Difference]: Finished difference Result 291 states and 358 transitions. [2022-02-14 22:09:36,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-14 22:09:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2022-02-14 22:09:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:09:36,763 INFO L225 Difference]: With dead ends: 291 [2022-02-14 22:09:36,763 INFO L226 Difference]: Without dead ends: 291 [2022-02-14 22:09:36,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=716, Unknown=0, NotChecked=0, Total=992 [2022-02-14 22:09:36,764 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 183 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 136 mSolverCounterUnsat, 14 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 61.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 14 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 61.7s IncrementalHoareTripleChecker+Time [2022-02-14 22:09:36,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 197 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 431 Invalid, 14 Unknown, 0 Unchecked, 61.7s Time] [2022-02-14 22:09:36,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-02-14 22:09:36,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2022-02-14 22:09:36,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 154 states have (on average 1.1623376623376624) internal successors, (179), 162 states have internal predecessors, (179), 75 states have call successors, (75), 28 states have call predecessors, (75), 27 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2022-02-14 22:09:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 324 transitions. [2022-02-14 22:09:36,781 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 324 transitions. Word has length 32 [2022-02-14 22:09:36,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:09:36,781 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 324 transitions. [2022-02-14 22:09:36,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 14 states have internal predecessors, (48), 4 states have call successors, (8), 5 states have call predecessors, (8), 3 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-14 22:09:36,781 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 324 transitions. [2022-02-14 22:09:36,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-14 22:09:36,783 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:09:36,783 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:09:36,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-14 22:09:36,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-14 22:09:36,992 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:09:36,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:09:36,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1556551492, now seen corresponding path program 2 times [2022-02-14 22:09:36,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:09:36,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690833084] [2022-02-14 22:09:36,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:09:36,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:09:37,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:09:37,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-14 22:09:37,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:09:37,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-14 22:09:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-14 22:09:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-14 22:09:37,213 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-14 22:09:37,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690833084] [2022-02-14 22:09:37,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690833084] provided 0 perfect and 1 imperfect interpolant sequences [2022-02-14 22:09:37,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087655266] [2022-02-14 22:09:37,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-14 22:09:37,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:09:37,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:09:37,220 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:09:37,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-14 22:09:37,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-02-14 22:09:37,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-14 22:09:37,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 4 conjunts are in the unsatisfiable core [2022-02-14 22:09:37,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-14 22:09:37,356 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2022-02-14 22:09:37,356 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-14 22:09:37,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087655266] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-14 22:09:37,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-14 22:09:37,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2022-02-14 22:09:37,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063462750] [2022-02-14 22:09:37,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-14 22:09:37,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-14 22:09:37,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-14 22:09:37,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-14 22:09:37,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2022-02-14 22:09:37,358 INFO L87 Difference]: Start difference. First operand 257 states and 324 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 22:09:37,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-14 22:09:37,387 INFO L93 Difference]: Finished difference Result 256 states and 321 transitions. [2022-02-14 22:09:37,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-14 22:09:37,388 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 50 [2022-02-14 22:09:37,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-14 22:09:37,389 INFO L225 Difference]: With dead ends: 256 [2022-02-14 22:09:37,390 INFO L226 Difference]: Without dead ends: 254 [2022-02-14 22:09:37,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2022-02-14 22:09:37,390 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-14 22:09:37,391 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-14 22:09:37,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-14 22:09:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 249. [2022-02-14 22:09:37,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 147 states have (on average 1.1564625850340136) internal successors, (170), 154 states have internal predecessors, (170), 74 states have call successors, (74), 28 states have call predecessors, (74), 27 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2022-02-14 22:09:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 313 transitions. [2022-02-14 22:09:37,402 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 313 transitions. Word has length 50 [2022-02-14 22:09:37,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-14 22:09:37,402 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 313 transitions. [2022-02-14 22:09:37,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-14 22:09:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 313 transitions. [2022-02-14 22:09:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-14 22:09:37,404 INFO L506 BasicCegarLoop]: Found error trace [2022-02-14 22:09:37,404 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-14 22:09:37,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-14 22:09:37,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:09:37,619 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-14 22:09:37,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-14 22:09:37,620 INFO L85 PathProgramCache]: Analyzing trace with hash -926681017, now seen corresponding path program 1 times [2022-02-14 22:09:37,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-14 22:09:37,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999195129] [2022-02-14 22:09:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:09:37,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-14 22:09:37,628 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-14 22:09:37,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018711881] [2022-02-14 22:09:37,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-14 22:09:37,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-14 22:09:37,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-14 22:09:37,630 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-02-14 22:09:37,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process