/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/ps4-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 20:37:51,733 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 20:37:51,734 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 20:37:51,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 20:37:51,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 20:37:51,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 20:37:51,771 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 20:37:51,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 20:37:51,772 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 20:37:51,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 20:37:51,773 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 20:37:51,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 20:37:51,775 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 20:37:51,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 20:37:51,781 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 20:37:51,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 20:37:51,783 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 20:37:51,792 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 20:37:51,796 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 20:37:51,797 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 20:37:51,800 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 20:37:51,800 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-03-18 20:37:51,809 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 20:37:51,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 20:37:51,811 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 20:37:51,811 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 20:37:51,811 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 20:37:51,811 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 20:37:51,811 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 20:37:51,812 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 20:37:51,812 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 20:37:51,812 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 20:37:51,812 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 20:37:51,812 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 20:37:51,813 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 20:37:51,813 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 20:37:51,813 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 20:37:51,813 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 20:37:51,813 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-18 20:37:51,813 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 20:37:51,813 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:37:51,813 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 20:37:51,813 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 20:37:51,814 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-03-18 20:37:51,814 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 20:37:52,020 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 20:37:52,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 20:37:52,044 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 20:37:52,045 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 20:37:52,046 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 20:37:52,047 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-03-18 20:37:52,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d046f5613/77a3d771950144e1a730aa448ad12047/FLAG60ea08e1a [2022-03-18 20:37:52,407 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 20:37:52,407 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound100.c [2022-03-18 20:37:52,411 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d046f5613/77a3d771950144e1a730aa448ad12047/FLAG60ea08e1a [2022-03-18 20:37:52,859 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d046f5613/77a3d771950144e1a730aa448ad12047 [2022-03-18 20:37:52,861 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 20:37:52,862 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-03-18 20:37:52,864 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 20:37:52,864 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 20:37:52,866 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 20:37:52,866 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:37:52" (1/1) ... [2022-03-18 20:37:52,867 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@115b7e48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:52, skipping insertion in model container [2022-03-18 20:37:52,867 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 08:37:52" (1/1) ... [2022-03-18 20:37:52,871 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 20:37:52,880 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 20:37:52,996 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/ps4-ll_valuebound100.c[458,471] [2022-03-18 20:37:53,015 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:37:53,023 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 20:37:53,038 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/ps4-ll_valuebound100.c[458,471] [2022-03-18 20:37:53,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 20:37:53,069 INFO L208 MainTranslator]: Completed translation [2022-03-18 20:37:53,069 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:53 WrapperNode [2022-03-18 20:37:53,069 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 20:37:53,072 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 20:37:53,072 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 20:37:53,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 20:37:53,082 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:53" (1/1) ... [2022-03-18 20:37:53,083 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:53" (1/1) ... [2022-03-18 20:37:53,089 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:53" (1/1) ... [2022-03-18 20:37:53,089 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:53" (1/1) ... [2022-03-18 20:37:53,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:53" (1/1) ... [2022-03-18 20:37:53,107 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:53" (1/1) ... [2022-03-18 20:37:53,108 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:53" (1/1) ... [2022-03-18 20:37:53,109 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 20:37:53,109 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 20:37:53,110 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 20:37:53,110 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 20:37:53,111 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:53" (1/1) ... [2022-03-18 20:37:53,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 20:37:53,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:37:53,154 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 20:37:53,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 20:37:53,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 20:37:53,194 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 20:37:53,195 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 20:37:53,195 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 20:37:53,195 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 20:37:53,195 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 20:37:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 20:37:53,195 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 20:37:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 20:37:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 20:37:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-03-18 20:37:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 20:37:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 20:37:53,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 20:37:53,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 20:37:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 20:37:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 20:37:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 20:37:53,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 20:37:53,199 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 20:37:53,245 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 20:37:53,246 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 20:37:53,401 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 20:37:53,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 20:37:53,405 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 20:37:53,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:37:53 BoogieIcfgContainer [2022-03-18 20:37:53,407 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 20:37:53,407 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-03-18 20:37:53,407 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-03-18 20:37:53,419 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-03-18 20:37:53,422 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:37:53" (1/1) ... [2022-03-18 20:37:53,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:37:53 BasicIcfg [2022-03-18 20:37:53,433 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-03-18 20:37:53,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 20:37:53,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 20:37:53,439 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 20:37:53,439 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 08:37:52" (1/4) ... [2022-03-18 20:37:53,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca64d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:37:53, skipping insertion in model container [2022-03-18 20:37:53,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 08:37:53" (2/4) ... [2022-03-18 20:37:53,440 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca64d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 08:37:53, skipping insertion in model container [2022-03-18 20:37:53,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 08:37:53" (3/4) ... [2022-03-18 20:37:53,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ca64d22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.03 08:37:53, skipping insertion in model container [2022-03-18 20:37:53,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 18.03 08:37:53" (4/4) ... [2022-03-18 20:37:53,442 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound100.cJordan [2022-03-18 20:37:53,448 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-03-18 20:37:53,448 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 20:37:53,487 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 20:37:53,495 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=ForwardPredicates, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 20:37:53,495 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 20:37:53,507 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 20:37:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 20:37:53,525 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:37:53,525 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:37:53,526 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:37:53,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:37:53,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2022-03-18 20:37:53,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:37:53,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720706702] [2022-03-18 20:37:53,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:53,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:37:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:37:53,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-18 20:37:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:37:53,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-18 20:37:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:37:53,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:37:53,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:37:53,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720706702] [2022-03-18 20:37:53,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720706702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:37:53,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:37:53,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-18 20:37:53,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189512975] [2022-03-18 20:37:53,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:37:53,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-18 20:37:53,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:37:53,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-18 20:37:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-18 20:37:53,752 INFO L87 Difference]: Start difference. First operand has 28 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-18 20:37:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:37:53,807 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-03-18 20:37:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-18 20:37:53,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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 17 [2022-03-18 20:37:53,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:37:53,815 INFO L225 Difference]: With dead ends: 28 [2022-03-18 20:37:53,815 INFO L226 Difference]: Without dead ends: 23 [2022-03-18 20:37:53,817 INFO L911 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 [2022-03-18 20:37:53,820 INFO L912 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:37:53,821 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:37:53,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-18 20:37:53,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-18 20:37:53,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 20:37:53,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-03-18 20:37:53,850 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-03-18 20:37:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:37:53,851 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-03-18 20:37:53,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 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) [2022-03-18 20:37:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-03-18 20:37:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-18 20:37:53,852 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:37:53,852 INFO L500 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:37:53,853 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-18 20:37:53,853 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:37:53,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:37:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2022-03-18 20:37:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:37:53,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198088242] [2022-03-18 20:37:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:53,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:37:53,887 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:37:53,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362136705] [2022-03-18 20:37:53,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:53,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:53,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:37:53,926 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:37:53,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 20:37:53,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:37:53,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 20:37:53,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:37:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:37:54,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 20:37:54,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:37:54,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198088242] [2022-03-18 20:37:54,093 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:37:54,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362136705] [2022-03-18 20:37:54,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362136705] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 20:37:54,093 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 20:37:54,093 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 20:37:54,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232357413] [2022-03-18 20:37:54,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:37:54,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 20:37:54,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:37:54,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 20:37:54,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 20:37:54,096 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-18 20:37:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:37:54,129 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-03-18 20:37:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 20:37:54,129 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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 17 [2022-03-18 20:37:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:37:54,130 INFO L225 Difference]: With dead ends: 32 [2022-03-18 20:37:54,130 INFO L226 Difference]: Without dead ends: 30 [2022-03-18 20:37:54,130 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 20:37:54,131 INFO L912 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:37:54,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 83 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:37:54,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-03-18 20:37:54,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-03-18 20:37:54,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 20:37:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-03-18 20:37:54,137 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-03-18 20:37:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:37:54,137 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-03-18 20:37:54,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 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) [2022-03-18 20:37:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-03-18 20:37:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-18 20:37:54,138 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:37:54,138 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:37:54,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-18 20:37:54,351 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:54,352 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:37:54,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:37:54,352 INFO L85 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2022-03-18 20:37:54,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:37:54,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526566039] [2022-03-18 20:37:54,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:54,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:37:54,361 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:37:54,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064314389] [2022-03-18 20:37:54,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:54,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:54,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:37:54,375 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:37:54,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 20:37:54,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:37:54,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-18 20:37:54,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:37:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-18 20:37:54,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:37:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 20:37:54,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:37:54,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526566039] [2022-03-18 20:37:54,837 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:37:54,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064314389] [2022-03-18 20:37:54,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064314389] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-18 20:37:54,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:37:54,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-03-18 20:37:54,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960238457] [2022-03-18 20:37:54,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 20:37:54,838 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 20:37:54,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:37:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 20:37:54,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-18 20:37:54,839 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 20:37:54,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:37:54,882 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-03-18 20:37:54,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 20:37:54,883 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), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-03-18 20:37:54,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:37:54,883 INFO L225 Difference]: With dead ends: 34 [2022-03-18 20:37:54,883 INFO L226 Difference]: Without dead ends: 31 [2022-03-18 20:37:54,884 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-03-18 20:37:54,884 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:37:54,885 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 76 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:37:54,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-18 20:37:54,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-18 20:37:54,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 20:37:54,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-18 20:37:54,888 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-03-18 20:37:54,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:37:54,888 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-18 20:37:54,889 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 20:37:54,889 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-18 20:37:54,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-18 20:37:54,889 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:37:54,889 INFO L500 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:37:54,914 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-18 20:37:55,090 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-18 20:37:55,090 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:37:55,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:37:55,091 INFO L85 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2022-03-18 20:37:55,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:37:55,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064944329] [2022-03-18 20:37:55,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:55,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:37:55,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:37:55,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704824653] [2022-03-18 20:37:55,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:55,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:55,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:37:55,108 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:37:55,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 20:37:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:37:55,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-18 20:37:55,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:37:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 20:37:55,353 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:37:55,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:37:55,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064944329] [2022-03-18 20:37:55,560 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:37:55,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704824653] [2022-03-18 20:37:55,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704824653] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:37:55,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:37:55,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-18 20:37:55,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194935798] [2022-03-18 20:37:55,561 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:37:55,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-18 20:37:55,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:37:55,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-18 20:37:55,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-03-18 20:37:55,564 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 20:37:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:37:55,617 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-03-18 20:37:55,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-18 20:37:55,618 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2022-03-18 20:37:55,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:37:55,619 INFO L225 Difference]: With dead ends: 37 [2022-03-18 20:37:55,619 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 20:37:55,619 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-03-18 20:37:55,620 INFO L912 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:37:55,620 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:37:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 20:37:55,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-03-18 20:37:55,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 20:37:55,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-03-18 20:37:55,624 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-03-18 20:37:55,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:37:55,624 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-03-18 20:37:55,624 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-03-18 20:37:55,625 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-03-18 20:37:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-03-18 20:37:55,625 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:37:55,625 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:37:55,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 20:37:55,831 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:55,832 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:37:55,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:37:55,832 INFO L85 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2022-03-18 20:37:55,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:37:55,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050739833] [2022-03-18 20:37:55,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:55,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:37:55,840 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:37:55,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [72991521] [2022-03-18 20:37:55,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:37:55,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:55,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:37:55,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:37:55,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 20:37:55,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:37:55,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:37:55,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-18 20:37:55,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:37:56,090 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-18 20:37:56,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:37:56,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:37:56,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050739833] [2022-03-18 20:37:56,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:37:56,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72991521] [2022-03-18 20:37:56,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72991521] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:37:56,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:37:56,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-03-18 20:37:56,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318596404] [2022-03-18 20:37:56,280 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:37:56,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 20:37:56,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:37:56,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 20:37:56,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-18 20:37:56,281 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 20:37:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:37:56,334 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-03-18 20:37:56,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 20:37:56,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2022-03-18 20:37:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:37:56,335 INFO L225 Difference]: With dead ends: 40 [2022-03-18 20:37:56,335 INFO L226 Difference]: Without dead ends: 37 [2022-03-18 20:37:56,336 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-03-18 20:37:56,336 INFO L912 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:37:56,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 165 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:37:56,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-18 20:37:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-18 20:37:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 8 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 20:37:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-03-18 20:37:56,340 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-03-18 20:37:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:37:56,340 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-03-18 20:37:56,340 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-03-18 20:37:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-03-18 20:37:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-18 20:37:56,341 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:37:56,341 INFO L500 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:37:56,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 20:37:56,548 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:56,548 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:37:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:37:56,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2022-03-18 20:37:56,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:37:56,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090576959] [2022-03-18 20:37:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:56,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:37:56,555 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:37:56,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1427394690] [2022-03-18 20:37:56,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:37:56,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:56,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:37:56,557 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:37:56,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 20:37:56,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-18 20:37:56,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:37:56,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-18 20:37:56,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:37:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-18 20:37:56,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:37:56,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:37:56,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090576959] [2022-03-18 20:37:56,951 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:37:56,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427394690] [2022-03-18 20:37:56,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427394690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:37:56,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:37:56,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-18 20:37:56,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911706995] [2022-03-18 20:37:56,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:37:56,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-18 20:37:56,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:37:56,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-18 20:37:56,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-18 20:37:56,952 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 20:37:57,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:37:57,016 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-03-18 20:37:57,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-18 20:37:57,017 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 44 [2022-03-18 20:37:57,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:37:57,017 INFO L225 Difference]: With dead ends: 43 [2022-03-18 20:37:57,018 INFO L226 Difference]: Without dead ends: 40 [2022-03-18 20:37:57,018 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-18 20:37:57,018 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:37:57,019 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 20:37:57,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-18 20:37:57,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-03-18 20:37:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 9 states have call successors, (9), 6 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 20:37:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-03-18 20:37:57,022 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-03-18 20:37:57,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:37:57,022 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-03-18 20:37:57,022 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 8 states have internal predecessors, (21), 6 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-03-18 20:37:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-03-18 20:37:57,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-03-18 20:37:57,023 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:37:57,023 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:37:57,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 20:37:57,228 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:57,228 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:37:57,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:37:57,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2022-03-18 20:37:57,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:37:57,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627788035] [2022-03-18 20:37:57,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:57,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:37:57,235 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:37:57,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971427792] [2022-03-18 20:37:57,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 20:37:57,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:57,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:37:57,240 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:37:57,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 20:37:57,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 20:37:57,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:37:57,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-18 20:37:57,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:37:57,624 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-18 20:37:57,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:37:57,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:37:57,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627788035] [2022-03-18 20:37:57,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:37:57,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971427792] [2022-03-18 20:37:57,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971427792] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:37:57,800 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:37:57,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-18 20:37:57,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230707588] [2022-03-18 20:37:57,800 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:37:57,801 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 20:37:57,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:37:57,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 20:37:57,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-03-18 20:37:57,802 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 20:37:57,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:37:57,889 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-03-18 20:37:57,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 20:37:57,889 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) Word has length 51 [2022-03-18 20:37:57,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:37:57,890 INFO L225 Difference]: With dead ends: 46 [2022-03-18 20:37:57,890 INFO L226 Difference]: Without dead ends: 43 [2022-03-18 20:37:57,890 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-03-18 20:37:57,890 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:37:57,890 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 249 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:37:57,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-18 20:37:57,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-18 20:37:57,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 10 states have call successors, (10), 6 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-03-18 20:37:57,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-03-18 20:37:57,894 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-03-18 20:37:57,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:37:57,894 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-03-18 20:37:57,894 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 7 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 6 states have call predecessors, (7), 6 states have call successors, (7) [2022-03-18 20:37:57,894 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-03-18 20:37:57,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-18 20:37:57,895 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:37:57,895 INFO L500 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:37:57,914 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 20:37:58,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:58,104 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:37:58,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:37:58,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2022-03-18 20:37:58,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:37:58,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535276201] [2022-03-18 20:37:58,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:58,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:37:58,110 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:37:58,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1104594512] [2022-03-18 20:37:58,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 20:37:58,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:58,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:37:58,116 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:37:58,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 20:37:58,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-03-18 20:37:58,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:37:58,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-03-18 20:37:58,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:37:58,406 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-18 20:37:58,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:37:58,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:37:58,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535276201] [2022-03-18 20:37:58,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:37:58,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104594512] [2022-03-18 20:37:58,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104594512] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:37:58,527 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:37:58,527 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-18 20:37:58,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078392563] [2022-03-18 20:37:58,528 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:37:58,528 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-18 20:37:58,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:37:58,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-18 20:37:58,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-03-18 20:37:58,529 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 20:37:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:37:58,641 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-03-18 20:37:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-18 20:37:58,641 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 58 [2022-03-18 20:37:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:37:58,642 INFO L225 Difference]: With dead ends: 49 [2022-03-18 20:37:58,642 INFO L226 Difference]: Without dead ends: 46 [2022-03-18 20:37:58,642 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-18 20:37:58,643 INFO L912 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:37:58,643 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 297 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:37:58,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-03-18 20:37:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-03-18 20:37:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 6 states have call predecessors, (11), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-03-18 20:37:58,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-03-18 20:37:58,648 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-03-18 20:37:58,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:37:58,649 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-03-18 20:37:58,649 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 10 states have internal predecessors, (25), 8 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-18 20:37:58,649 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-03-18 20:37:58,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-03-18 20:37:58,650 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:37:58,650 INFO L500 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:37:58,671 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-18 20:37:58,855 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:58,858 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:37:58,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:37:58,858 INFO L85 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2022-03-18 20:37:58,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:37:58,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450949981] [2022-03-18 20:37:58,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:58,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:37:58,864 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:37:58,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264180786] [2022-03-18 20:37:58,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 20:37:58,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:58,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:37:58,866 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) [2022-03-18 20:37:58,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 20:37:59,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-18 20:37:59,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:37:59,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-18 20:37:59,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:37:59,240 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-18 20:37:59,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:37:59,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:37:59,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450949981] [2022-03-18 20:37:59,351 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:37:59,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264180786] [2022-03-18 20:37:59,351 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264180786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:37:59,351 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:37:59,351 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-03-18 20:37:59,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256338248] [2022-03-18 20:37:59,351 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:37:59,352 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-18 20:37:59,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:37:59,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-18 20:37:59,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-18 20:37:59,352 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-18 20:37:59,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:37:59,466 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-03-18 20:37:59,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-18 20:37:59,466 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2022-03-18 20:37:59,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:37:59,467 INFO L225 Difference]: With dead ends: 52 [2022-03-18 20:37:59,467 INFO L226 Difference]: Without dead ends: 49 [2022-03-18 20:37:59,467 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-03-18 20:37:59,468 INFO L912 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:37:59,468 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 349 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:37:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-18 20:37:59,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-18 20:37:59,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 12 states have call successors, (12), 6 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-18 20:37:59,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-03-18 20:37:59,471 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-03-18 20:37:59,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:37:59,471 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-03-18 20:37:59,471 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 9 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-03-18 20:37:59,471 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-03-18 20:37:59,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-18 20:37:59,472 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:37:59,472 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:37:59,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-18 20:37:59,679 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-18 20:37:59,680 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:37:59,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:37:59,680 INFO L85 PathProgramCache]: Analyzing trace with hash 4292050, now seen corresponding path program 7 times [2022-03-18 20:37:59,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:37:59,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685206219] [2022-03-18 20:37:59,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:37:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:37:59,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:37:59,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970187888] [2022-03-18 20:37:59,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 20:37:59,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:37:59,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:37:59,688 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) [2022-03-18 20:37:59,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 20:38:00,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:38:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-18 20:38:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:38:00,272 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-03-18 20:38:00,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:38:00,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:38:00,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685206219] [2022-03-18 20:38:00,372 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:38:00,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970187888] [2022-03-18 20:38:00,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970187888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:38:00,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:38:00,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-03-18 20:38:00,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280168229] [2022-03-18 20:38:00,372 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:38:00,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-18 20:38:00,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:38:00,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-18 20:38:00,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-18 20:38:00,373 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 20:38:00,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:38:00,505 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-03-18 20:38:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-18 20:38:00,505 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 72 [2022-03-18 20:38:00,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:38:00,506 INFO L225 Difference]: With dead ends: 55 [2022-03-18 20:38:00,506 INFO L226 Difference]: Without dead ends: 52 [2022-03-18 20:38:00,506 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-18 20:38:00,507 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:38:00,507 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 405 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:38:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-18 20:38:00,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-03-18 20:38:00,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 13 states have call successors, (13), 6 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-03-18 20:38:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-03-18 20:38:00,510 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-03-18 20:38:00,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:38:00,510 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-03-18 20:38:00,511 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 12 states have internal predecessors, (29), 10 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-03-18 20:38:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-03-18 20:38:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-03-18 20:38:00,511 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:38:00,511 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:38:00,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-03-18 20:38:00,716 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-18 20:38:00,716 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:38:00,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:38:00,717 INFO L85 PathProgramCache]: Analyzing trace with hash 395442112, now seen corresponding path program 8 times [2022-03-18 20:38:00,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:38:00,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365405861] [2022-03-18 20:38:00,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:38:00,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:38:00,723 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:38:00,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155027880] [2022-03-18 20:38:00,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:38:00,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:38:00,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:38:00,724 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) [2022-03-18 20:38:00,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-18 20:38:01,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:38:01,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:38:01,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-18 20:38:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:38:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-18 20:38:01,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:38:01,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:38:01,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365405861] [2022-03-18 20:38:01,686 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:38:01,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155027880] [2022-03-18 20:38:01,687 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155027880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:38:01,687 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:38:01,687 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-03-18 20:38:01,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170573868] [2022-03-18 20:38:01,687 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:38:01,687 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 20:38:01,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:38:01,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 20:38:01,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-18 20:38:01,688 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-18 20:38:01,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:38:01,844 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-03-18 20:38:01,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-18 20:38:01,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 79 [2022-03-18 20:38:01,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:38:01,847 INFO L225 Difference]: With dead ends: 58 [2022-03-18 20:38:01,847 INFO L226 Difference]: Without dead ends: 55 [2022-03-18 20:38:01,848 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-18 20:38:01,848 INFO L912 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:38:01,848 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 465 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:38:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-18 20:38:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-18 20:38:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 14 states have call successors, (14), 6 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-18 20:38:01,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-03-18 20:38:01,851 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-03-18 20:38:01,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:38:01,851 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-03-18 20:38:01,851 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 11 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-03-18 20:38:01,851 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-03-18 20:38:01,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-18 20:38:01,852 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:38:01,852 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:38:01,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-18 20:38:02,055 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-18 20:38:02,055 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:38:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:38:02,056 INFO L85 PathProgramCache]: Analyzing trace with hash 667883026, now seen corresponding path program 9 times [2022-03-18 20:38:02,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:38:02,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041619019] [2022-03-18 20:38:02,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:38:02,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:38:02,062 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:38:02,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1983400338] [2022-03-18 20:38:02,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:38:02,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:38:02,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:38:02,066 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:38:02,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-18 20:38:02,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-03-18 20:38:02,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:38:02,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-18 20:38:02,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:38:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-03-18 20:38:02,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:38:02,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:38:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041619019] [2022-03-18 20:38:02,960 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:38:02,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983400338] [2022-03-18 20:38:02,960 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983400338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:38:02,960 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:38:02,960 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-18 20:38:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130497869] [2022-03-18 20:38:02,960 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:38:02,960 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-18 20:38:02,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:38:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-18 20:38:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-03-18 20:38:02,961 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 20:38:03,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:38:03,132 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-03-18 20:38:03,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-18 20:38:03,132 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) Word has length 86 [2022-03-18 20:38:03,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:38:03,133 INFO L225 Difference]: With dead ends: 61 [2022-03-18 20:38:03,133 INFO L226 Difference]: Without dead ends: 58 [2022-03-18 20:38:03,133 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2022-03-18 20:38:03,134 INFO L912 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:38:03,134 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 529 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 20:38:03,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-03-18 20:38:03,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-03-18 20:38:03,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 15 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 20:38:03,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-03-18 20:38:03,137 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-03-18 20:38:03,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:38:03,137 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-03-18 20:38:03,137 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 14 states have internal predecessors, (33), 12 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 11 states have call predecessors, (12), 11 states have call successors, (12) [2022-03-18 20:38:03,137 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-03-18 20:38:03,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-03-18 20:38:03,138 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:38:03,138 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:38:03,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-18 20:38:03,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-18 20:38:03,343 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:38:03,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:38:03,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1918146432, now seen corresponding path program 10 times [2022-03-18 20:38:03,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:38:03,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50548010] [2022-03-18 20:38:03,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:38:03,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:38:03,360 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:38:03,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1907317877] [2022-03-18 20:38:03,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 20:38:03,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:38:03,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:38:03,362 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:38:03,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-18 20:38:03,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 20:38:03,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:38:03,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 48 conjunts are in the unsatisfiable core [2022-03-18 20:38:03,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:38:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-03-18 20:38:04,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:38:04,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:38:04,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50548010] [2022-03-18 20:38:04,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:38:04,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907317877] [2022-03-18 20:38:04,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907317877] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:38:04,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:38:04,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-18 20:38:04,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658064058] [2022-03-18 20:38:04,254 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:38:04,254 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-18 20:38:04,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:38:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-18 20:38:04,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-18 20:38:04,255 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-18 20:38:04,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:38:04,437 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-03-18 20:38:04,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-18 20:38:04,438 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) Word has length 93 [2022-03-18 20:38:04,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:38:04,438 INFO L225 Difference]: With dead ends: 64 [2022-03-18 20:38:04,438 INFO L226 Difference]: Without dead ends: 61 [2022-03-18 20:38:04,439 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-03-18 20:38:04,439 INFO L912 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 20:38:04,439 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 597 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 20:38:04,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-18 20:38:04,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-18 20:38:04,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 16 states have call successors, (16), 6 states have call predecessors, (16), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-18 20:38:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-03-18 20:38:04,443 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-03-18 20:38:04,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:38:04,443 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-03-18 20:38:04,443 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 13 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 12 states have call predecessors, (13), 12 states have call successors, (13) [2022-03-18 20:38:04,443 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-03-18 20:38:04,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-18 20:38:04,444 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:38:04,444 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:38:04,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-18 20:38:04,655 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-18 20:38:04,656 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:38:04,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:38:04,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1384988242, now seen corresponding path program 11 times [2022-03-18 20:38:04,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:38:04,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234424399] [2022-03-18 20:38:04,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:38:04,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:38:04,662 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:38:04,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1027591079] [2022-03-18 20:38:04,662 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 20:38:04,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:38:04,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:38:04,663 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:38:04,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-18 20:38:05,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-03-18 20:38:05,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:38:05,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-18 20:38:05,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:38:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-03-18 20:38:05,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:38:06,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:38:06,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234424399] [2022-03-18 20:38:06,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:38:06,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027591079] [2022-03-18 20:38:06,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027591079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:38:06,362 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:38:06,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-03-18 20:38:06,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24103886] [2022-03-18 20:38:06,362 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:38:06,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-18 20:38:06,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:38:06,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-18 20:38:06,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-03-18 20:38:06,363 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-18 20:38:06,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:38:06,602 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-03-18 20:38:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-18 20:38:06,602 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-03-18 20:38:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:38:06,603 INFO L225 Difference]: With dead ends: 67 [2022-03-18 20:38:06,603 INFO L226 Difference]: Without dead ends: 64 [2022-03-18 20:38:06,603 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2022-03-18 20:38:06,604 INFO L912 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 614 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-18 20:38:06,604 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 669 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-18 20:38:06,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-18 20:38:06,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-03-18 20:38:06,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-18 20:38:06,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-03-18 20:38:06,607 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-03-18 20:38:06,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:38:06,607 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-03-18 20:38:06,608 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-03-18 20:38:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-03-18 20:38:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-18 20:38:06,608 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:38:06,608 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:38:06,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-18 20:38:06,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-18 20:38:06,813 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:38:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:38:06,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2099554112, now seen corresponding path program 12 times [2022-03-18 20:38:06,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:38:06,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516126661] [2022-03-18 20:38:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:38:06,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:38:06,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:38:06,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512655520] [2022-03-18 20:38:06,824 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 20:38:06,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:38:06,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:38:06,825 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:38:06,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-18 20:38:07,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-03-18 20:38:07,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:38:07,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 68 conjunts are in the unsatisfiable core [2022-03-18 20:38:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:38:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 90 proven. 236 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-03-18 20:38:07,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:38:12,134 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0)) (.cse2 (* 13 c_main_~y~0 c_main_~y~0)) (.cse3 (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0))) (or (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 c_main_~k~0) (* .cse0 .cse0))) (not (<= (+ (* c_main_~y~0 c_main_~y~0 c_main_~y~0) c_main_~x~0 1 (* 3 (* c_main_~y~0 c_main_~y~0))) (div (+ .cse1 .cse2 4 .cse3) 4))) (not (= 0 (mod (+ .cse1 .cse2 .cse3) 4))) (< (+ c_main_~c~0 1) c_main_~k~0) (not (< c_main_~c~0 c_main_~k~0)))) is different from false [2022-03-18 20:38:16,188 WARN L833 $PredicateComparison]: unable to prove that (or (= (+ (* c_main_~y~0 c_main_~k~0) c_main_~k~0) (+ (* 2 c_main_~y~0) (* c_main_~y~0 c_main_~y~0) 1)) (<= c_main_~k~0 c_main_~c~0) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4))) (< (+ c_main_~c~0 1) c_main_~k~0)) is different from false [2022-03-18 20:38:49,471 WARN L232 SmtUtils]: Spent 5.21s on a formula simplification that was a NOOP. DAG size: 29 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-18 20:40:31,600 WARN L833 $PredicateComparison]: unable to prove that (or (not (= (mod (let ((.cse0 (+ 6 c_main_~y~0))) (+ (* .cse0 .cse0 .cse0 6) (* .cse0 .cse0 13) (* .cse0 .cse0 .cse0 .cse0))) 4) 0)) (forall ((main_~k~0 Int)) (or (<= main_~k~0 (+ 6 c_main_~c~0)) (< (+ 7 c_main_~c~0) main_~k~0) (= (+ (* 7 main_~k~0) (* main_~k~0 c_main_~y~0)) (+ (* 14 c_main_~y~0) 49 (* c_main_~y~0 c_main_~y~0)))))) is different from false [2022-03-18 20:40:33,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:40:33,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516126661] [2022-03-18 20:40:33,618 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:40:33,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512655520] [2022-03-18 20:40:33,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512655520] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:40:33,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:40:33,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-18 20:40:33,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091447143] [2022-03-18 20:40:33,619 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:40:33,619 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-18 20:40:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:40:33,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-18 20:40:33,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=776, Unknown=15, NotChecked=180, Total=1122 [2022-03-18 20:40:33,620 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-18 20:40:34,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:40:34,031 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2022-03-18 20:40:34,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 20:40:34,031 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2022-03-18 20:40:34,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:40:34,032 INFO L225 Difference]: With dead ends: 70 [2022-03-18 20:40:34,032 INFO L226 Difference]: Without dead ends: 67 [2022-03-18 20:40:34,032 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 105.5s TimeCoverageRelationStatistics Valid=172, Invalid=947, Unknown=15, NotChecked=198, Total=1332 [2022-03-18 20:40:34,033 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 661 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 20:40:34,033 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 748 Invalid, 663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 661 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 20:40:34,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-18 20:40:34,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-18 20:40:34,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-18 20:40:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-03-18 20:40:34,036 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-03-18 20:40:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:40:34,036 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-03-18 20:40:34,036 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 15 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-03-18 20:40:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-03-18 20:40:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-18 20:40:34,037 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:40:34,037 INFO L500 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:40:34,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-18 20:40:34,242 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:40:34,242 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:40:34,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:40:34,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1740638574, now seen corresponding path program 13 times [2022-03-18 20:40:34,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:40:34,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692590530] [2022-03-18 20:40:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:40:34,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:40:34,249 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:40:34,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [113510532] [2022-03-18 20:40:34,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 20:40:34,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:40:34,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:40:34,252 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:40:34,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-18 20:40:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:40:35,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-18 20:40:35,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:40:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 98 proven. 275 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-03-18 20:40:35,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:40:56,350 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= (mod (+ (* (- 6) c_main_~y~0 c_main_~y~0 c_main_~y~0) (* (- 13) c_main_~y~0 c_main_~y~0) (* (- 1) c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4) 0))) is different from false [2022-03-18 20:40:56,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:40:56,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692590530] [2022-03-18 20:40:56,352 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:40:56,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113510532] [2022-03-18 20:40:56,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113510532] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:40:56,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:40:56,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-18 20:40:56,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217164630] [2022-03-18 20:40:56,353 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:40:56,353 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 20:40:56,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:40:56,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 20:40:56,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=668, Unknown=4, NotChecked=52, Total=812 [2022-03-18 20:40:56,354 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-18 20:40:56,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:40:56,755 INFO L93 Difference]: Finished difference Result 73 states and 86 transitions. [2022-03-18 20:40:56,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 20:40:56,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2022-03-18 20:40:56,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:40:56,756 INFO L225 Difference]: With dead ends: 73 [2022-03-18 20:40:56,756 INFO L226 Difference]: Without dead ends: 70 [2022-03-18 20:40:56,756 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 16.8s TimeCoverageRelationStatistics Valid=109, Invalid=821, Unknown=4, NotChecked=58, Total=992 [2022-03-18 20:40:56,757 INFO L912 BasicCegarLoop]: 44 mSDtfsCounter, 7 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 20:40:56,757 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 826 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 20:40:56,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-03-18 20:40:56,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-03-18 20:40:56,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-18 20:40:56,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-03-18 20:40:56,760 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-03-18 20:40:56,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:40:56,760 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-03-18 20:40:56,760 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 20 states have internal predecessors, (44), 16 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-03-18 20:40:56,760 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-03-18 20:40:56,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-03-18 20:40:56,761 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:40:56,761 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:40:56,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-18 20:40:56,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-18 20:40:56,967 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:40:56,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:40:56,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1682036992, now seen corresponding path program 14 times [2022-03-18 20:40:56,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:40:56,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830965128] [2022-03-18 20:40:56,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:40:56,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:40:56,983 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:40:56,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1764565617] [2022-03-18 20:40:56,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:40:56,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:40:56,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:40:56,985 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:40:56,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-18 20:40:57,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:40:57,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:40:57,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 64 conjunts are in the unsatisfiable core [2022-03-18 20:40:57,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:40:57,878 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-03-18 20:40:57,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:40:58,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:40:58,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830965128] [2022-03-18 20:40:58,024 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:40:58,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764565617] [2022-03-18 20:40:58,024 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764565617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:40:58,024 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:40:58,024 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-03-18 20:40:58,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384022318] [2022-03-18 20:40:58,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:40:58,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-18 20:40:58,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:40:58,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-18 20:40:58,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-18 20:40:58,026 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-18 20:40:58,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:40:58,368 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2022-03-18 20:40:58,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-18 20:40:58,369 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2022-03-18 20:40:58,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:40:58,369 INFO L225 Difference]: With dead ends: 76 [2022-03-18 20:40:58,369 INFO L226 Difference]: Without dead ends: 73 [2022-03-18 20:40:58,370 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-18 20:40:58,370 INFO L912 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 845 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 20:40:58,370 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 909 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 20:40:58,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-18 20:40:58,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-18 20:40:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 20 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-18 20:40:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-03-18 20:40:58,373 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-03-18 20:40:58,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:40:58,374 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-03-18 20:40:58,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-03-18 20:40:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-03-18 20:40:58,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-18 20:40:58,375 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:40:58,375 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:40:58,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2022-03-18 20:40:58,580 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-18 20:40:58,580 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:40:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:40:58,580 INFO L85 PathProgramCache]: Analyzing trace with hash 699088594, now seen corresponding path program 15 times [2022-03-18 20:40:58,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:40:58,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340452190] [2022-03-18 20:40:58,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:40:58,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:40:58,592 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:40:58,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363483403] [2022-03-18 20:40:58,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:40:58,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:40:58,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:40:58,593 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:40:58,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-18 20:40:59,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-03-18 20:40:59,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:40:59,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-18 20:40:59,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:40:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-03-18 20:40:59,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:41:00,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:41:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340452190] [2022-03-18 20:41:00,733 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:41:00,733 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363483403] [2022-03-18 20:41:00,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363483403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:41:00,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:41:00,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-03-18 20:41:00,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612913807] [2022-03-18 20:41:00,733 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:41:00,734 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-18 20:41:00,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:41:00,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-18 20:41:00,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=305, Invalid=1101, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 20:41:00,735 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-18 20:41:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:41:01,136 INFO L93 Difference]: Finished difference Result 79 states and 94 transitions. [2022-03-18 20:41:01,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-18 20:41:01,136 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2022-03-18 20:41:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:41:01,137 INFO L225 Difference]: With dead ends: 79 [2022-03-18 20:41:01,137 INFO L226 Difference]: Without dead ends: 76 [2022-03-18 20:41:01,137 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=1245, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 20:41:01,138 INFO L912 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 653 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 20:41:01,138 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 997 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 653 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 20:41:01,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-03-18 20:41:01,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-03-18 20:41:01,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-18 20:41:01,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-03-18 20:41:01,140 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-03-18 20:41:01,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:41:01,141 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-03-18 20:41:01,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-03-18 20:41:01,141 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-03-18 20:41:01,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-18 20:41:01,142 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:41:01,142 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:41:01,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-18 20:41:01,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-18 20:41:01,344 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:41:01,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:41:01,344 INFO L85 PathProgramCache]: Analyzing trace with hash -119728448, now seen corresponding path program 16 times [2022-03-18 20:41:01,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:41:01,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391315006] [2022-03-18 20:41:01,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:41:01,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:41:01,350 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:41:01,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1757572212] [2022-03-18 20:41:01,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 20:41:01,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:01,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:41:01,356 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:41:01,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-18 20:41:01,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 20:41:01,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:41:01,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-18 20:41:01,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:41:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 122 proven. 410 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-03-18 20:41:02,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:41:30,848 WARN L833 $PredicateComparison]: unable to prove that (or (forall ((main_~k~0 Int)) (or (< (+ c_main_~c~0 1) main_~k~0) (not (< c_main_~c~0 main_~k~0)) (let ((.cse0 (+ c_main_~y~0 1))) (= (* .cse0 .cse0) (* main_~k~0 .cse0))))) (not (= 0 (mod (+ (* 6 c_main_~y~0 c_main_~y~0 c_main_~y~0) (* 13 c_main_~y~0 c_main_~y~0) (* c_main_~y~0 c_main_~y~0 c_main_~y~0 c_main_~y~0)) 4)))) is different from false [2022-03-18 20:41:30,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:41:30,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391315006] [2022-03-18 20:41:30,850 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:41:30,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757572212] [2022-03-18 20:41:30,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757572212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:41:30,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:41:30,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-18 20:41:30,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525624769] [2022-03-18 20:41:30,851 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:41:30,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 20:41:30,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:41:30,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 20:41:30,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=830, Unknown=7, NotChecked=58, Total=992 [2022-03-18 20:41:30,852 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-18 20:41:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:41:31,382 INFO L93 Difference]: Finished difference Result 82 states and 98 transitions. [2022-03-18 20:41:31,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 20:41:31,382 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2022-03-18 20:41:31,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:41:31,383 INFO L225 Difference]: With dead ends: 82 [2022-03-18 20:41:31,383 INFO L226 Difference]: Without dead ends: 79 [2022-03-18 20:41:31,384 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 24.7s TimeCoverageRelationStatistics Valid=118, Invalid=1001, Unknown=7, NotChecked=64, Total=1190 [2022-03-18 20:41:31,384 INFO L912 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 950 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 1037 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 20:41:31,384 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 1037 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 950 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 20:41:31,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-18 20:41:31,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-18 20:41:31,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-18 20:41:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-03-18 20:41:31,386 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-03-18 20:41:31,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:41:31,387 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-03-18 20:41:31,387 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 23 states have internal predecessors, (50), 19 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-03-18 20:41:31,387 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-03-18 20:41:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-18 20:41:31,387 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:41:31,387 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:41:31,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-18 20:41:31,592 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:31,593 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:41:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:41:31,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1869408494, now seen corresponding path program 17 times [2022-03-18 20:41:31,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:41:31,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017772270] [2022-03-18 20:41:31,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:41:31,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:41:31,599 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:41:31,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704171261] [2022-03-18 20:41:31,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 20:41:31,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:31,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:41:31,600 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:41:31,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-18 20:41:32,768 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2022-03-18 20:41:32,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:41:32,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 76 conjunts are in the unsatisfiable core [2022-03-18 20:41:32,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:41:33,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-03-18 20:41:33,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:41:33,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:41:33,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017772270] [2022-03-18 20:41:33,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:41:33,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704171261] [2022-03-18 20:41:33,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704171261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:41:33,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:41:33,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-03-18 20:41:33,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599796446] [2022-03-18 20:41:33,458 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:41:33,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-18 20:41:33,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:41:33,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-18 20:41:33,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-18 20:41:33,459 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-18 20:41:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:41:33,874 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2022-03-18 20:41:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-18 20:41:33,875 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2022-03-18 20:41:33,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:41:33,875 INFO L225 Difference]: With dead ends: 85 [2022-03-18 20:41:33,875 INFO L226 Difference]: Without dead ends: 82 [2022-03-18 20:41:33,875 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-03-18 20:41:33,877 INFO L912 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 20:41:33,877 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1185 Invalid, 805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 805 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 20:41:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-03-18 20:41:33,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-03-18 20:41:33,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-18 20:41:33,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-03-18 20:41:33,884 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-03-18 20:41:33,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:41:33,884 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-03-18 20:41:33,884 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-03-18 20:41:33,884 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-03-18 20:41:33,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-03-18 20:41:33,885 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:41:33,885 INFO L500 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:41:33,892 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-18 20:41:34,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:34,095 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:41:34,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:41:34,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1178433152, now seen corresponding path program 18 times [2022-03-18 20:41:34,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:41:34,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120608446] [2022-03-18 20:41:34,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:41:34,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:41:34,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:41:34,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1947380255] [2022-03-18 20:41:34,101 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 20:41:34,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:34,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:41:34,102 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:41:34,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-18 20:41:42,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-03-18 20:41:42,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:41:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 80 conjunts are in the unsatisfiable core [2022-03-18 20:41:42,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:41:43,415 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-03-18 20:41:43,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:41:43,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:41:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120608446] [2022-03-18 20:41:43,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:41:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947380255] [2022-03-18 20:41:43,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947380255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:41:43,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:41:43,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-03-18 20:41:43,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601429910] [2022-03-18 20:41:43,581 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:41:43,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-18 20:41:43,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:41:43,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-18 20:41:43,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-03-18 20:41:43,582 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-18 20:41:44,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:41:44,064 INFO L93 Difference]: Finished difference Result 88 states and 106 transitions. [2022-03-18 20:41:44,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-18 20:41:44,064 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2022-03-18 20:41:44,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:41:44,065 INFO L225 Difference]: With dead ends: 88 [2022-03-18 20:41:44,065 INFO L226 Difference]: Without dead ends: 85 [2022-03-18 20:41:44,065 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-03-18 20:41:44,066 INFO L912 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 1209 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1285 SdHoareTripleChecker+Invalid, 887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-18 20:41:44,066 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1285 Invalid, 887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-18 20:41:44,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-18 20:41:44,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-18 20:41:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-03-18 20:41:44,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-03-18 20:41:44,068 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-03-18 20:41:44,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:41:44,068 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-03-18 20:41:44,069 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-03-18 20:41:44,069 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-03-18 20:41:44,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-18 20:41:44,069 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:41:44,069 INFO L500 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:41:44,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-18 20:41:44,270 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-18 20:41:44,270 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:41:44,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:41:44,270 INFO L85 PathProgramCache]: Analyzing trace with hash -272924846, now seen corresponding path program 19 times [2022-03-18 20:41:44,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:41:44,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348671871] [2022-03-18 20:41:44,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:41:44,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:41:44,277 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:41:44,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291766439] [2022-03-18 20:41:44,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 20:41:44,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:44,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:41:44,279 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:41:44,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-18 20:41:44,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:41:44,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 84 conjunts are in the unsatisfiable core [2022-03-18 20:41:44,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:41:45,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-03-18 20:41:45,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:41:45,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:41:45,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348671871] [2022-03-18 20:41:45,635 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:41:45,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291766439] [2022-03-18 20:41:45,635 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291766439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:41:45,635 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:41:45,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-03-18 20:41:45,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282584463] [2022-03-18 20:41:45,635 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:41:45,635 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-18 20:41:45,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:41:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-18 20:41:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2022-03-18 20:41:45,636 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-18 20:41:46,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:41:46,165 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-03-18 20:41:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-18 20:41:46,165 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2022-03-18 20:41:46,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:41:46,166 INFO L225 Difference]: With dead ends: 91 [2022-03-18 20:41:46,166 INFO L226 Difference]: Without dead ends: 88 [2022-03-18 20:41:46,166 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-03-18 20:41:46,166 INFO L912 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 1310 mSDsCounter, 0 mSdLazyCounter, 973 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1389 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 20:41:46,167 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1389 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 973 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 20:41:46,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-18 20:41:46,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-18 20:41:46,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 25 states have call successors, (25), 6 states have call predecessors, (25), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-03-18 20:41:46,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-03-18 20:41:46,169 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-03-18 20:41:46,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:41:46,169 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-03-18 20:41:46,169 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-03-18 20:41:46,169 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-03-18 20:41:46,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-03-18 20:41:46,170 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:41:46,170 INFO L500 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:41:46,175 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-18 20:41:46,375 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-18 20:41:46,375 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:41:46,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:41:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 2090550848, now seen corresponding path program 20 times [2022-03-18 20:41:46,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:41:46,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090790188] [2022-03-18 20:41:46,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:41:46,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:41:46,393 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:41:46,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375047388] [2022-03-18 20:41:46,394 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:41:46,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:46,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:41:46,396 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:41:46,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-18 20:41:46,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:41:46,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:41:46,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 88 conjunts are in the unsatisfiable core [2022-03-18 20:41:46,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:41:47,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-03-18 20:41:47,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:41:47,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:41:47,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090790188] [2022-03-18 20:41:47,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:41:47,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375047388] [2022-03-18 20:41:47,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375047388] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:41:47,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:41:47,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-03-18 20:41:47,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904835797] [2022-03-18 20:41:47,681 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:41:47,682 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 20:41:47,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:41:47,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 20:41:47,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-03-18 20:41:47,682 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-18 20:41:48,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:41:48,236 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2022-03-18 20:41:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-18 20:41:48,236 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 163 [2022-03-18 20:41:48,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:41:48,237 INFO L225 Difference]: With dead ends: 94 [2022-03-18 20:41:48,237 INFO L226 Difference]: Without dead ends: 91 [2022-03-18 20:41:48,238 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-03-18 20:41:48,238 INFO L912 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 1415 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1497 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-18 20:41:48,238 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1497 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-18 20:41:48,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-18 20:41:48,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-18 20:41:48,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 26 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-18 20:41:48,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-03-18 20:41:48,240 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 163 [2022-03-18 20:41:48,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:41:48,241 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-03-18 20:41:48,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-03-18 20:41:48,241 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-03-18 20:41:48,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-03-18 20:41:48,241 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:41:48,242 INFO L500 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:41:48,258 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-03-18 20:41:48,458 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:48,459 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:41:48,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:41:48,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1122531218, now seen corresponding path program 21 times [2022-03-18 20:41:48,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:41:48,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128430538] [2022-03-18 20:41:48,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:41:48,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:41:48,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:41:48,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225221641] [2022-03-18 20:41:48,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:41:48,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:48,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:41:48,480 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:41:48,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-18 20:41:50,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2022-03-18 20:41:50,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:41:50,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 92 conjunts are in the unsatisfiable core [2022-03-18 20:41:50,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:41:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 44 proven. 693 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-03-18 20:41:50,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:41:51,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:41:51,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128430538] [2022-03-18 20:41:51,060 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:41:51,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225221641] [2022-03-18 20:41:51,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225221641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:41:51,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:41:51,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-03-18 20:41:51,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042196428] [2022-03-18 20:41:51,060 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:41:51,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-18 20:41:51,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:41:51,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-18 20:41:51,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2022-03-18 20:41:51,061 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-18 20:41:51,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:41:51,673 INFO L93 Difference]: Finished difference Result 97 states and 118 transitions. [2022-03-18 20:41:51,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-18 20:41:51,673 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2022-03-18 20:41:51,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:41:51,675 INFO L225 Difference]: With dead ends: 97 [2022-03-18 20:41:51,675 INFO L226 Difference]: Without dead ends: 94 [2022-03-18 20:41:51,675 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-03-18 20:41:51,676 INFO L912 BasicCegarLoop]: 85 mSDtfsCounter, 2 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1609 SdHoareTripleChecker+Invalid, 1157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 20:41:51,676 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1609 Invalid, 1157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 20:41:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-18 20:41:51,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-03-18 20:41:51,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 27 states have call successors, (27), 6 states have call predecessors, (27), 4 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 20:41:51,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 115 transitions. [2022-03-18 20:41:51,683 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 115 transitions. Word has length 170 [2022-03-18 20:41:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:41:51,684 INFO L478 AbstractCegarLoop]: Abstraction has 94 states and 115 transitions. [2022-03-18 20:41:51,687 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 24 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 23 states have call predecessors, (24), 23 states have call successors, (24) [2022-03-18 20:41:51,687 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 115 transitions. [2022-03-18 20:41:51,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2022-03-18 20:41:51,688 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:41:51,688 INFO L500 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:41:51,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-18 20:41:51,894 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:51,894 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:41:51,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:41:51,895 INFO L85 PathProgramCache]: Analyzing trace with hash -1682799104, now seen corresponding path program 22 times [2022-03-18 20:41:51,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:41:51,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929508550] [2022-03-18 20:41:51,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:41:51,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:41:51,901 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:41:51,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [480360683] [2022-03-18 20:41:51,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 20:41:51,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:51,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:41:51,902 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:41:51,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-18 20:41:52,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 20:41:52,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:41:52,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 96 conjunts are in the unsatisfiable core [2022-03-18 20:41:52,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:41:53,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 46 proven. 759 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2022-03-18 20:41:53,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:41:53,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:41:53,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929508550] [2022-03-18 20:41:53,368 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:41:53,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480360683] [2022-03-18 20:41:53,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480360683] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:41:53,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:41:53,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2022-03-18 20:41:53,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14985765] [2022-03-18 20:41:53,368 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:41:53,369 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-18 20:41:53,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:41:53,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-18 20:41:53,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-03-18 20:41:53,369 INFO L87 Difference]: Start difference. First operand 94 states and 115 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-18 20:41:54,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:41:54,073 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2022-03-18 20:41:54,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-18 20:41:54,074 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) Word has length 177 [2022-03-18 20:41:54,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:41:54,074 INFO L225 Difference]: With dead ends: 100 [2022-03-18 20:41:54,074 INFO L226 Difference]: Without dead ends: 97 [2022-03-18 20:41:54,075 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=97, Invalid=959, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 20:41:54,075 INFO L912 BasicCegarLoop]: 88 mSDtfsCounter, 2 mSDsluCounter, 1637 mSDsCounter, 0 mSdLazyCounter, 1255 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1725 SdHoareTripleChecker+Invalid, 1255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 20:41:54,076 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1725 Invalid, 1255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 20:41:54,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-18 20:41:54,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-18 20:41:54,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 28 states have call successors, (28), 6 states have call predecessors, (28), 4 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-03-18 20:41:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 119 transitions. [2022-03-18 20:41:54,089 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 119 transitions. Word has length 177 [2022-03-18 20:41:54,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:41:54,090 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 119 transitions. [2022-03-18 20:41:54,091 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 27 states have internal predecessors, (59), 25 states have call successors, (27), 2 states have call predecessors, (27), 1 states have return successors, (25), 24 states have call predecessors, (25), 24 states have call successors, (25) [2022-03-18 20:41:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 119 transitions. [2022-03-18 20:41:54,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-03-18 20:41:54,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:41:54,092 INFO L500 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:41:54,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-03-18 20:41:54,292 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-03-18 20:41:54,293 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:41:54,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:41:54,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1629618222, now seen corresponding path program 23 times [2022-03-18 20:41:54,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:41:54,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330133981] [2022-03-18 20:41:54,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:41:54,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:41:54,299 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:41:54,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1347377028] [2022-03-18 20:41:54,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 20:41:54,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:41:54,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:41:54,300 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:41:54,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-18 20:42:15,008 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2022-03-18 20:42:15,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:42:15,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 100 conjunts are in the unsatisfiable core [2022-03-18 20:42:15,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:42:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 48 proven. 828 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2022-03-18 20:42:15,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:42:15,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:42:15,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330133981] [2022-03-18 20:42:15,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:42:15,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347377028] [2022-03-18 20:42:15,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347377028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:42:15,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:42:15,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-03-18 20:42:15,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644634668] [2022-03-18 20:42:15,896 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:42:15,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-18 20:42:15,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:42:15,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-18 20:42:15,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2022-03-18 20:42:15,896 INFO L87 Difference]: Start difference. First operand 97 states and 119 transitions. Second operand has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-18 20:42:16,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:42:16,626 INFO L93 Difference]: Finished difference Result 103 states and 126 transitions. [2022-03-18 20:42:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-18 20:42:16,626 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) Word has length 184 [2022-03-18 20:42:16,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:42:16,627 INFO L225 Difference]: With dead ends: 103 [2022-03-18 20:42:16,627 INFO L226 Difference]: Without dead ends: 100 [2022-03-18 20:42:16,627 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 165 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 20:42:16,627 INFO L912 BasicCegarLoop]: 91 mSDtfsCounter, 2 mSDsluCounter, 1754 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1845 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 20:42:16,628 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1845 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 20:42:16,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-18 20:42:16,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-03-18 20:42:16,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 29 states have call successors, (29), 6 states have call predecessors, (29), 4 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-03-18 20:42:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2022-03-18 20:42:16,630 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 184 [2022-03-18 20:42:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:42:16,630 INFO L478 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2022-03-18 20:42:16,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 28 states have internal predecessors, (61), 26 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2022-03-18 20:42:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2022-03-18 20:42:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-03-18 20:42:16,631 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:42:16,631 INFO L500 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:42:16,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-18 20:42:16,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-18 20:42:16,843 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:42:16,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:42:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1782527424, now seen corresponding path program 24 times [2022-03-18 20:42:16,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:42:16,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979188282] [2022-03-18 20:42:16,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:42:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:42:16,849 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:42:16,849 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802965729] [2022-03-18 20:42:16,850 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 20:42:16,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:16,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:42:16,851 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:42:16,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-18 20:42:18,378 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2022-03-18 20:42:18,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:42:18,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 104 conjunts are in the unsatisfiable core [2022-03-18 20:42:18,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:42:19,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 50 proven. 900 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2022-03-18 20:42:19,087 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:42:19,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:42:19,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979188282] [2022-03-18 20:42:19,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:42:19,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802965729] [2022-03-18 20:42:19,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802965729] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:42:19,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:42:19,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-03-18 20:42:19,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327865772] [2022-03-18 20:42:19,260 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:42:19,261 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-18 20:42:19,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:42:19,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-18 20:42:19,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-18 20:42:19,262 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-18 20:42:20,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:42:20,070 INFO L93 Difference]: Finished difference Result 106 states and 130 transitions. [2022-03-18 20:42:20,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-18 20:42:20,071 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) Word has length 191 [2022-03-18 20:42:20,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:42:20,071 INFO L225 Difference]: With dead ends: 106 [2022-03-18 20:42:20,071 INFO L226 Difference]: Without dead ends: 103 [2022-03-18 20:42:20,072 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1087, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 20:42:20,072 INFO L912 BasicCegarLoop]: 94 mSDtfsCounter, 2 mSDsluCounter, 1875 mSDsCounter, 0 mSdLazyCounter, 1463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 1969 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 20:42:20,072 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 1969 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1463 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 20:42:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-18 20:42:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-18 20:42:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 30 states have call successors, (30), 6 states have call predecessors, (30), 4 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-18 20:42:20,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-18 20:42:20,089 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 191 [2022-03-18 20:42:20,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:42:20,090 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-18 20:42:20,090 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.1724137931034484) internal successors, (63), 29 states have internal predecessors, (63), 27 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (27), 26 states have call predecessors, (27), 26 states have call successors, (27) [2022-03-18 20:42:20,091 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-18 20:42:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-03-18 20:42:20,092 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:42:20,092 INFO L500 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:42:20,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-18 20:42:20,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-18 20:42:20,300 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:42:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:42:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1902123026, now seen corresponding path program 25 times [2022-03-18 20:42:20,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:42:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169817236] [2022-03-18 20:42:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:42:20,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:42:20,306 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:42:20,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883091020] [2022-03-18 20:42:20,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 20:42:20,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:20,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:42:20,307 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:42:20,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-18 20:42:21,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:42:21,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 503 conjuncts, 108 conjunts are in the unsatisfiable core [2022-03-18 20:42:21,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:42:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 52 proven. 975 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [2022-03-18 20:42:21,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:42:22,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:42:22,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169817236] [2022-03-18 20:42:22,017 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:42:22,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883091020] [2022-03-18 20:42:22,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883091020] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:42:22,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:42:22,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2022-03-18 20:42:22,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437850742] [2022-03-18 20:42:22,018 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:42:22,018 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-18 20:42:22,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:42:22,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-18 20:42:22,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2022-03-18 20:42:22,019 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-18 20:42:22,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:42:22,792 INFO L93 Difference]: Finished difference Result 109 states and 134 transitions. [2022-03-18 20:42:22,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-18 20:42:22,792 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) Word has length 198 [2022-03-18 20:42:22,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:42:22,793 INFO L225 Difference]: With dead ends: 109 [2022-03-18 20:42:22,793 INFO L226 Difference]: Without dead ends: 106 [2022-03-18 20:42:22,793 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 177 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 20:42:22,794 INFO L912 BasicCegarLoop]: 97 mSDtfsCounter, 2 mSDsluCounter, 2000 mSDsCounter, 0 mSdLazyCounter, 1573 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2097 SdHoareTripleChecker+Invalid, 1573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1573 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-18 20:42:22,794 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2097 Invalid, 1573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1573 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-18 20:42:22,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-18 20:42:22,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2022-03-18 20:42:22,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 31 states have call successors, (31), 6 states have call predecessors, (31), 4 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-18 20:42:22,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 131 transitions. [2022-03-18 20:42:22,796 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 131 transitions. Word has length 198 [2022-03-18 20:42:22,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:42:22,797 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 131 transitions. [2022-03-18 20:42:22,797 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 28 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2022-03-18 20:42:22,797 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 131 transitions. [2022-03-18 20:42:22,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-03-18 20:42:22,797 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:42:22,797 INFO L500 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:42:22,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-03-18 20:42:23,002 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-18 20:42:23,002 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:42:23,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:42:23,003 INFO L85 PathProgramCache]: Analyzing trace with hash 905794944, now seen corresponding path program 26 times [2022-03-18 20:42:23,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:42:23,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297583474] [2022-03-18 20:42:23,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:42:23,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:42:23,009 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:42:23,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681764736] [2022-03-18 20:42:23,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:42:23,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:23,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:42:23,011 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:42:23,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-18 20:42:23,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:42:23,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:42:23,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 112 conjunts are in the unsatisfiable core [2022-03-18 20:42:23,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:42:24,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 54 proven. 1053 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-03-18 20:42:24,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:42:24,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:42:24,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297583474] [2022-03-18 20:42:24,629 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:42:24,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681764736] [2022-03-18 20:42:24,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681764736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:42:24,629 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:42:24,629 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2022-03-18 20:42:24,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855644609] [2022-03-18 20:42:24,629 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:42:24,630 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-18 20:42:24,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:42:24,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-18 20:42:24,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2022-03-18 20:42:24,630 INFO L87 Difference]: Start difference. First operand 106 states and 131 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-18 20:42:25,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:42:25,521 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2022-03-18 20:42:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-18 20:42:25,522 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) Word has length 205 [2022-03-18 20:42:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:42:25,522 INFO L225 Difference]: With dead ends: 112 [2022-03-18 20:42:25,523 INFO L226 Difference]: Without dead ends: 109 [2022-03-18 20:42:25,523 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=109, Invalid=1223, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 20:42:25,523 INFO L912 BasicCegarLoop]: 100 mSDtfsCounter, 2 mSDsluCounter, 2129 mSDsCounter, 0 mSdLazyCounter, 1687 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2229 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-18 20:42:25,523 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2229 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1687 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-18 20:42:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-18 20:42:25,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-18 20:42:25,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 32 states have call successors, (32), 6 states have call predecessors, (32), 4 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-18 20:42:25,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 135 transitions. [2022-03-18 20:42:25,526 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 135 transitions. Word has length 205 [2022-03-18 20:42:25,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:42:25,526 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 135 transitions. [2022-03-18 20:42:25,526 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 31 states have internal predecessors, (67), 29 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 28 states have call predecessors, (29), 28 states have call successors, (29) [2022-03-18 20:42:25,526 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 135 transitions. [2022-03-18 20:42:25,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-03-18 20:42:25,527 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:42:25,527 INFO L500 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:42:25,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-18 20:42:25,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-18 20:42:25,733 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:42:25,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:42:25,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1053638574, now seen corresponding path program 27 times [2022-03-18 20:42:25,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:42:25,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122960714] [2022-03-18 20:42:25,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:42:25,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:42:25,742 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:42:25,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444718429] [2022-03-18 20:42:25,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:42:25,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:25,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:42:25,743 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:42:25,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-18 20:42:27,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2022-03-18 20:42:27,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:42:27,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 116 conjunts are in the unsatisfiable core [2022-03-18 20:42:27,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:42:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2702 backedges. 56 proven. 1134 refuted. 0 times theorem prover too weak. 1512 trivial. 0 not checked. [2022-03-18 20:42:28,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:42:28,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:42:28,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122960714] [2022-03-18 20:42:28,292 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:42:28,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444718429] [2022-03-18 20:42:28,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444718429] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:42:28,292 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:42:28,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2022-03-18 20:42:28,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500811607] [2022-03-18 20:42:28,293 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:42:28,293 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-18 20:42:28,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:42:28,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-18 20:42:28,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2022-03-18 20:42:28,294 INFO L87 Difference]: Start difference. First operand 109 states and 135 transitions. Second operand has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-18 20:42:29,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:42:29,276 INFO L93 Difference]: Finished difference Result 115 states and 142 transitions. [2022-03-18 20:42:29,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-18 20:42:29,277 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) Word has length 212 [2022-03-18 20:42:29,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:42:29,277 INFO L225 Difference]: With dead ends: 115 [2022-03-18 20:42:29,277 INFO L226 Difference]: Without dead ends: 112 [2022-03-18 20:42:29,278 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 20:42:29,278 INFO L912 BasicCegarLoop]: 103 mSDtfsCounter, 2 mSDsluCounter, 2262 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2365 SdHoareTripleChecker+Invalid, 1805 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 20:42:29,278 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2365 Invalid, 1805 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 20:42:29,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-03-18 20:42:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-03-18 20:42:29,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 33 states have call successors, (33), 6 states have call predecessors, (33), 4 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2022-03-18 20:42:29,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2022-03-18 20:42:29,282 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 212 [2022-03-18 20:42:29,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:42:29,282 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2022-03-18 20:42:29,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.15625) internal successors, (69), 32 states have internal predecessors, (69), 30 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 29 states have call predecessors, (30), 29 states have call successors, (30) [2022-03-18 20:42:29,282 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2022-03-18 20:42:29,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-03-18 20:42:29,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:42:29,283 INFO L500 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:42:29,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-18 20:42:29,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:29,490 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:42:29,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:42:29,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1817647808, now seen corresponding path program 28 times [2022-03-18 20:42:29,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:42:29,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027104608] [2022-03-18 20:42:29,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:42:29,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:42:29,496 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:42:29,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1071283486] [2022-03-18 20:42:29,496 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 20:42:29,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:29,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:42:29,498 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:42:29,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-18 20:42:30,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 20:42:30,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:42:30,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 523 conjuncts, 120 conjunts are in the unsatisfiable core [2022-03-18 20:42:30,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:42:31,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 58 proven. 1218 refuted. 0 times theorem prover too weak. 1624 trivial. 0 not checked. [2022-03-18 20:42:31,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:42:31,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:42:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027104608] [2022-03-18 20:42:31,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:42:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071283486] [2022-03-18 20:42:31,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071283486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:42:31,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:42:31,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2022-03-18 20:42:31,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045791362] [2022-03-18 20:42:31,248 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:42:31,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-18 20:42:31,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:42:31,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-18 20:42:31,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-03-18 20:42:31,249 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-18 20:42:32,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:42:32,210 INFO L93 Difference]: Finished difference Result 118 states and 146 transitions. [2022-03-18 20:42:32,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-18 20:42:32,211 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) Word has length 219 [2022-03-18 20:42:32,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:42:32,211 INFO L225 Difference]: With dead ends: 118 [2022-03-18 20:42:32,211 INFO L226 Difference]: Without dead ends: 115 [2022-03-18 20:42:32,212 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 195 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=115, Invalid=1367, Unknown=0, NotChecked=0, Total=1482 [2022-03-18 20:42:32,212 INFO L912 BasicCegarLoop]: 106 mSDtfsCounter, 2 mSDsluCounter, 2399 mSDsCounter, 0 mSdLazyCounter, 1927 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2505 SdHoareTripleChecker+Invalid, 1927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-18 20:42:32,212 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2505 Invalid, 1927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1927 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-18 20:42:32,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-18 20:42:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-18 20:42:32,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 34 states have call successors, (34), 6 states have call predecessors, (34), 4 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-18 20:42:32,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 143 transitions. [2022-03-18 20:42:32,215 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 143 transitions. Word has length 219 [2022-03-18 20:42:32,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:42:32,215 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 143 transitions. [2022-03-18 20:42:32,215 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.1515151515151514) internal successors, (71), 33 states have internal predecessors, (71), 31 states have call successors, (33), 2 states have call predecessors, (33), 1 states have return successors, (31), 30 states have call predecessors, (31), 30 states have call successors, (31) [2022-03-18 20:42:32,215 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 143 transitions. [2022-03-18 20:42:32,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-03-18 20:42:32,216 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:42:32,216 INFO L500 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:42:32,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-18 20:42:32,422 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-03-18 20:42:32,422 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:42:32,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:42:32,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1847195794, now seen corresponding path program 29 times [2022-03-18 20:42:32,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:42:32,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409609631] [2022-03-18 20:42:32,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:42:32,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:42:32,430 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:42:32,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [990742591] [2022-03-18 20:42:32,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 20:42:32,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:32,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:42:32,431 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:42:32,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-18 20:42:41,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2022-03-18 20:42:41,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:42:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 124 conjunts are in the unsatisfiable core [2022-03-18 20:42:41,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:42:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3105 backedges. 60 proven. 1305 refuted. 0 times theorem prover too weak. 1740 trivial. 0 not checked. [2022-03-18 20:42:42,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:42:42,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:42:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409609631] [2022-03-18 20:42:42,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:42:42,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990742591] [2022-03-18 20:42:42,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990742591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:42:42,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:42:42,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2022-03-18 20:42:42,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709506312] [2022-03-18 20:42:42,287 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:42:42,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-18 20:42:42,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:42:42,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-18 20:42:42,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2022-03-18 20:42:42,289 INFO L87 Difference]: Start difference. First operand 115 states and 143 transitions. Second operand has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-18 20:42:43,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:42:43,328 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2022-03-18 20:42:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-18 20:42:43,328 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) Word has length 226 [2022-03-18 20:42:43,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:42:43,329 INFO L225 Difference]: With dead ends: 121 [2022-03-18 20:42:43,329 INFO L226 Difference]: Without dead ends: 118 [2022-03-18 20:42:43,329 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 201 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 20:42:43,329 INFO L912 BasicCegarLoop]: 109 mSDtfsCounter, 2 mSDsluCounter, 2540 mSDsCounter, 0 mSdLazyCounter, 2053 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2649 SdHoareTripleChecker+Invalid, 2053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-18 20:42:43,330 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2649 Invalid, 2053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2053 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-18 20:42:43,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-18 20:42:43,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2022-03-18 20:42:43,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 35 states have call successors, (35), 6 states have call predecessors, (35), 4 states have return successors, (33), 33 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-18 20:42:43,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 147 transitions. [2022-03-18 20:42:43,332 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 147 transitions. Word has length 226 [2022-03-18 20:42:43,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:42:43,332 INFO L478 AbstractCegarLoop]: Abstraction has 118 states and 147 transitions. [2022-03-18 20:42:43,332 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.1470588235294117) internal successors, (73), 34 states have internal predecessors, (73), 32 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 31 states have call predecessors, (32), 31 states have call successors, (32) [2022-03-18 20:42:43,332 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 147 transitions. [2022-03-18 20:42:43,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-03-18 20:42:43,333 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:42:43,333 INFO L500 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:42:43,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-03-18 20:42:43,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:43,543 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:42:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:42:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash 519955712, now seen corresponding path program 30 times [2022-03-18 20:42:43,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:42:43,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597487239] [2022-03-18 20:42:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:42:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:42:43,552 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:42:43,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [242676324] [2022-03-18 20:42:43,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 20:42:43,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:43,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:42:43,554 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:42:43,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-18 20:42:53,827 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2022-03-18 20:42:53,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:42:53,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 129 conjunts are in the unsatisfiable core [2022-03-18 20:42:53,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:42:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 62 proven. 1395 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-03-18 20:42:54,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:42:57,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:42:57,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597487239] [2022-03-18 20:42:57,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:42:57,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242676324] [2022-03-18 20:42:57,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242676324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:42:57,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:42:57,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2022-03-18 20:42:57,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627914374] [2022-03-18 20:42:57,832 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:42:57,832 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-03-18 20:42:57,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:42:57,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-03-18 20:42:57,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1040, Invalid=3516, Unknown=0, NotChecked=0, Total=4556 [2022-03-18 20:42:57,834 INFO L87 Difference]: Start difference. First operand 118 states and 147 transitions. Second operand has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-18 20:42:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:42:59,015 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2022-03-18 20:42:59,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-18 20:42:59,016 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) Word has length 233 [2022-03-18 20:42:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:42:59,016 INFO L225 Difference]: With dead ends: 124 [2022-03-18 20:42:59,017 INFO L226 Difference]: Without dead ends: 121 [2022-03-18 20:42:59,018 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 381 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1050, Invalid=3780, Unknown=0, NotChecked=0, Total=4830 [2022-03-18 20:42:59,018 INFO L912 BasicCegarLoop]: 112 mSDtfsCounter, 2 mSDsluCounter, 2685 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2797 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:42:59,018 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2797 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 20:42:59,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-18 20:42:59,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-18 20:42:59,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 36 states have call successors, (36), 6 states have call predecessors, (36), 4 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-18 20:42:59,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 151 transitions. [2022-03-18 20:42:59,021 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 151 transitions. Word has length 233 [2022-03-18 20:42:59,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:42:59,021 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 151 transitions. [2022-03-18 20:42:59,021 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.142857142857143) internal successors, (75), 35 states have internal predecessors, (75), 33 states have call successors, (35), 2 states have call predecessors, (35), 1 states have return successors, (33), 32 states have call predecessors, (33), 32 states have call successors, (33) [2022-03-18 20:42:59,021 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 151 transitions. [2022-03-18 20:42:59,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-03-18 20:42:59,022 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:42:59,022 INFO L500 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:42:59,032 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-18 20:42:59,230 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:59,230 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:42:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:42:59,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1893318866, now seen corresponding path program 31 times [2022-03-18 20:42:59,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:42:59,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702484424] [2022-03-18 20:42:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:42:59,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:42:59,237 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:42:59,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1480427685] [2022-03-18 20:42:59,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 20:42:59,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:42:59,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:42:59,245 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:42:59,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-18 20:43:00,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:43:00,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 132 conjunts are in the unsatisfiable core [2022-03-18 20:43:00,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:43:00,913 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 64 proven. 1488 refuted. 0 times theorem prover too weak. 1984 trivial. 0 not checked. [2022-03-18 20:43:00,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:43:01,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:43:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702484424] [2022-03-18 20:43:01,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:43:01,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480427685] [2022-03-18 20:43:01,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480427685] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:43:01,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:43:01,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2022-03-18 20:43:01,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466328494] [2022-03-18 20:43:01,164 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:43:01,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-18 20:43:01,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:43:01,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-18 20:43:01,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2022-03-18 20:43:01,165 INFO L87 Difference]: Start difference. First operand 121 states and 151 transitions. Second operand has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-18 20:43:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:43:02,299 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2022-03-18 20:43:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-18 20:43:02,300 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) Word has length 240 [2022-03-18 20:43:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:43:02,300 INFO L225 Difference]: With dead ends: 127 [2022-03-18 20:43:02,301 INFO L226 Difference]: Without dead ends: 124 [2022-03-18 20:43:02,301 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 20:43:02,301 INFO L912 BasicCegarLoop]: 115 mSDtfsCounter, 2 mSDsluCounter, 2834 mSDsCounter, 0 mSdLazyCounter, 2317 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 2949 SdHoareTripleChecker+Invalid, 2317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-18 20:43:02,301 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 2949 Invalid, 2317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2317 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-18 20:43:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-18 20:43:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-18 20:43:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 37 states have call successors, (37), 6 states have call predecessors, (37), 4 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-18 20:43:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 155 transitions. [2022-03-18 20:43:02,305 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 155 transitions. Word has length 240 [2022-03-18 20:43:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:43:02,305 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 155 transitions. [2022-03-18 20:43:02,305 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.138888888888889) internal successors, (77), 36 states have internal predecessors, (77), 34 states have call successors, (36), 2 states have call predecessors, (36), 1 states have return successors, (34), 33 states have call predecessors, (34), 33 states have call successors, (34) [2022-03-18 20:43:02,305 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 155 transitions. [2022-03-18 20:43:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-03-18 20:43:02,306 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:43:02,306 INFO L500 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:43:02,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-18 20:43:02,512 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-03-18 20:43:02,512 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:43:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:43:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash 985158848, now seen corresponding path program 32 times [2022-03-18 20:43:02,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:43:02,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69067766] [2022-03-18 20:43:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:43:02,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:43:02,519 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:43:02,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381037800] [2022-03-18 20:43:02,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:43:02,519 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:43:02,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:43:02,520 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:43:02,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-18 20:43:03,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:43:03,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:43:03,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 137 conjunts are in the unsatisfiable core [2022-03-18 20:43:03,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:43:04,673 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 66 proven. 1584 refuted. 0 times theorem prover too weak. 2112 trivial. 0 not checked. [2022-03-18 20:43:04,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:43:08,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:43:08,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69067766] [2022-03-18 20:43:08,128 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:43:08,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381037800] [2022-03-18 20:43:08,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381037800] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:43:08,129 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:43:08,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2022-03-18 20:43:08,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14816988] [2022-03-18 20:43:08,129 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:43:08,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-03-18 20:43:08,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:43:08,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-03-18 20:43:08,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1172, Invalid=3940, Unknown=0, NotChecked=0, Total=5112 [2022-03-18 20:43:08,131 INFO L87 Difference]: Start difference. First operand 124 states and 155 transitions. Second operand has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-18 20:43:09,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:43:09,475 INFO L93 Difference]: Finished difference Result 130 states and 162 transitions. [2022-03-18 20:43:09,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-18 20:43:09,480 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) Word has length 247 [2022-03-18 20:43:09,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:43:09,481 INFO L225 Difference]: With dead ends: 130 [2022-03-18 20:43:09,481 INFO L226 Difference]: Without dead ends: 127 [2022-03-18 20:43:09,482 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 405 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1182, Invalid=4220, Unknown=0, NotChecked=0, Total=5402 [2022-03-18 20:43:09,482 INFO L912 BasicCegarLoop]: 118 mSDtfsCounter, 2 mSDsluCounter, 2987 mSDsCounter, 0 mSdLazyCounter, 2455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3105 SdHoareTripleChecker+Invalid, 2455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 20:43:09,482 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3105 Invalid, 2455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2455 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 20:43:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-18 20:43:09,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-18 20:43:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 38 states have call successors, (38), 6 states have call predecessors, (38), 4 states have return successors, (36), 36 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-18 20:43:09,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 159 transitions. [2022-03-18 20:43:09,485 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 159 transitions. Word has length 247 [2022-03-18 20:43:09,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:43:09,486 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 159 transitions. [2022-03-18 20:43:09,486 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.135135135135135) internal successors, (79), 37 states have internal predecessors, (79), 35 states have call successors, (37), 2 states have call predecessors, (37), 1 states have return successors, (35), 34 states have call predecessors, (35), 34 states have call successors, (35) [2022-03-18 20:43:09,486 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 159 transitions. [2022-03-18 20:43:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-03-18 20:43:09,487 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:43:09,487 INFO L500 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:43:09,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-03-18 20:43:09,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-18 20:43:09,695 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:43:09,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:43:09,697 INFO L85 PathProgramCache]: Analyzing trace with hash 456530194, now seen corresponding path program 33 times [2022-03-18 20:43:09,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:43:09,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466629052] [2022-03-18 20:43:09,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:43:09,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:43:09,710 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:43:09,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35364395] [2022-03-18 20:43:09,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:43:09,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:43:09,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:43:09,723 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:43:09,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-18 20:43:12,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2022-03-18 20:43:12,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:43:12,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 140 conjunts are in the unsatisfiable core [2022-03-18 20:43:12,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:43:13,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 68 proven. 1683 refuted. 0 times theorem prover too weak. 2244 trivial. 0 not checked. [2022-03-18 20:43:13,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:43:13,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:43:13,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466629052] [2022-03-18 20:43:13,512 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:43:13,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35364395] [2022-03-18 20:43:13,512 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35364395] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:43:13,512 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:43:13,512 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2022-03-18 20:43:13,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347334397] [2022-03-18 20:43:13,512 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:43:13,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-18 20:43:13,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:43:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-18 20:43:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2022-03-18 20:43:13,513 INFO L87 Difference]: Start difference. First operand 127 states and 159 transitions. Second operand has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-18 20:43:14,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:43:14,750 INFO L93 Difference]: Finished difference Result 133 states and 166 transitions. [2022-03-18 20:43:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-18 20:43:14,751 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) Word has length 254 [2022-03-18 20:43:14,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:43:14,751 INFO L225 Difference]: With dead ends: 133 [2022-03-18 20:43:14,752 INFO L226 Difference]: Without dead ends: 130 [2022-03-18 20:43:14,752 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 20:43:14,752 INFO L912 BasicCegarLoop]: 121 mSDtfsCounter, 2 mSDsluCounter, 3144 mSDsCounter, 0 mSdLazyCounter, 2597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3265 SdHoareTripleChecker+Invalid, 2597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 20:43:14,752 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3265 Invalid, 2597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2597 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 20:43:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-03-18 20:43:14,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-03-18 20:43:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 39 states have call successors, (39), 6 states have call predecessors, (39), 4 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2022-03-18 20:43:14,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 163 transitions. [2022-03-18 20:43:14,755 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 163 transitions. Word has length 254 [2022-03-18 20:43:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:43:14,755 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 163 transitions. [2022-03-18 20:43:14,755 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 38 states have internal predecessors, (81), 36 states have call successors, (38), 2 states have call predecessors, (38), 1 states have return successors, (36), 35 states have call predecessors, (36), 35 states have call successors, (36) [2022-03-18 20:43:14,755 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 163 transitions. [2022-03-18 20:43:14,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2022-03-18 20:43:14,756 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:43:14,756 INFO L500 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:43:14,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-03-18 20:43:14,963 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-18 20:43:14,964 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:43:14,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:43:14,964 INFO L85 PathProgramCache]: Analyzing trace with hash -795593600, now seen corresponding path program 34 times [2022-03-18 20:43:14,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:43:14,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613876473] [2022-03-18 20:43:14,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:43:14,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:43:14,971 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:43:14,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225759873] [2022-03-18 20:43:14,971 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 20:43:14,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:43:14,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:43:14,972 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:43:14,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-18 20:43:15,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 20:43:15,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:43:15,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 144 conjunts are in the unsatisfiable core [2022-03-18 20:43:15,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:43:16,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 70 proven. 1785 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2022-03-18 20:43:16,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:43:16,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:43:16,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613876473] [2022-03-18 20:43:16,998 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:43:16,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225759873] [2022-03-18 20:43:16,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225759873] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:43:16,999 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:43:16,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2022-03-18 20:43:16,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892327545] [2022-03-18 20:43:16,999 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:43:16,999 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-03-18 20:43:16,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:43:16,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-03-18 20:43:17,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-03-18 20:43:17,000 INFO L87 Difference]: Start difference. First operand 130 states and 163 transitions. Second operand has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-18 20:43:18,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:43:18,302 INFO L93 Difference]: Finished difference Result 136 states and 170 transitions. [2022-03-18 20:43:18,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-18 20:43:18,302 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) Word has length 261 [2022-03-18 20:43:18,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:43:18,303 INFO L225 Difference]: With dead ends: 136 [2022-03-18 20:43:18,303 INFO L226 Difference]: Without dead ends: 133 [2022-03-18 20:43:18,303 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 231 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-03-18 20:43:18,304 INFO L912 BasicCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 3305 mSDsCounter, 0 mSdLazyCounter, 2743 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3429 SdHoareTripleChecker+Invalid, 2743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-18 20:43:18,304 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3429 Invalid, 2743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2743 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-18 20:43:18,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-18 20:43:18,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-18 20:43:18,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 40 states have call successors, (40), 6 states have call predecessors, (40), 4 states have return successors, (38), 38 states have call predecessors, (38), 38 states have call successors, (38) [2022-03-18 20:43:18,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 167 transitions. [2022-03-18 20:43:18,306 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 167 transitions. Word has length 261 [2022-03-18 20:43:18,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:43:18,307 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 167 transitions. [2022-03-18 20:43:18,307 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.128205128205128) internal successors, (83), 39 states have internal predecessors, (83), 37 states have call successors, (39), 2 states have call predecessors, (39), 1 states have return successors, (37), 36 states have call predecessors, (37), 36 states have call successors, (37) [2022-03-18 20:43:18,307 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2022-03-18 20:43:18,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-03-18 20:43:18,308 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:43:18,308 INFO L500 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:43:18,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-18 20:43:18,513 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:43:18,514 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:43:18,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:43:18,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1475543378, now seen corresponding path program 35 times [2022-03-18 20:43:18,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:43:18,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777640574] [2022-03-18 20:43:18,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:43:18,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:43:18,521 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:43:18,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [409932635] [2022-03-18 20:43:18,521 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 20:43:18,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:43:18,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:43:18,552 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:43:18,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-18 20:43:44,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2022-03-18 20:43:44,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:43:44,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 148 conjunts are in the unsatisfiable core [2022-03-18 20:43:44,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:43:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 72 proven. 1890 refuted. 0 times theorem prover too weak. 2520 trivial. 0 not checked. [2022-03-18 20:43:45,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:43:46,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:43:46,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777640574] [2022-03-18 20:43:46,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:43:46,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409932635] [2022-03-18 20:43:46,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409932635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:43:46,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:43:46,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2022-03-18 20:43:46,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450935069] [2022-03-18 20:43:46,123 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:43:46,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-18 20:43:46,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:43:46,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-18 20:43:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2022-03-18 20:43:46,124 INFO L87 Difference]: Start difference. First operand 133 states and 167 transitions. Second operand has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-18 20:43:47,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:43:47,502 INFO L93 Difference]: Finished difference Result 139 states and 174 transitions. [2022-03-18 20:43:47,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-18 20:43:47,503 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) Word has length 268 [2022-03-18 20:43:47,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:43:47,503 INFO L225 Difference]: With dead ends: 139 [2022-03-18 20:43:47,503 INFO L226 Difference]: Without dead ends: 136 [2022-03-18 20:43:47,504 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 20:43:47,504 INFO L912 BasicCegarLoop]: 127 mSDtfsCounter, 2 mSDsluCounter, 3470 mSDsCounter, 0 mSdLazyCounter, 2893 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3597 SdHoareTripleChecker+Invalid, 2893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-18 20:43:47,504 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3597 Invalid, 2893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2893 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-18 20:43:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-03-18 20:43:47,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-03-18 20:43:47,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 41 states have call successors, (41), 6 states have call predecessors, (41), 4 states have return successors, (39), 39 states have call predecessors, (39), 39 states have call successors, (39) [2022-03-18 20:43:47,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 171 transitions. [2022-03-18 20:43:47,509 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 171 transitions. Word has length 268 [2022-03-18 20:43:47,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:43:47,509 INFO L478 AbstractCegarLoop]: Abstraction has 136 states and 171 transitions. [2022-03-18 20:43:47,509 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.125) internal successors, (85), 40 states have internal predecessors, (85), 38 states have call successors, (40), 2 states have call predecessors, (40), 1 states have return successors, (38), 37 states have call predecessors, (38), 37 states have call successors, (38) [2022-03-18 20:43:47,509 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 171 transitions. [2022-03-18 20:43:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-03-18 20:43:47,510 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:43:47,510 INFO L500 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:43:47,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-03-18 20:43:47,722 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-03-18 20:43:47,722 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:43:47,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:43:47,722 INFO L85 PathProgramCache]: Analyzing trace with hash 290292800, now seen corresponding path program 36 times [2022-03-18 20:43:47,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:43:47,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392425435] [2022-03-18 20:43:47,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:43:47,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:43:47,729 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:43:47,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [878249223] [2022-03-18 20:43:47,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 20:43:47,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:43:47,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:43:47,730 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:43:47,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-18 20:44:06,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2022-03-18 20:44:06,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:44:06,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 690 conjuncts, 153 conjunts are in the unsatisfiable core [2022-03-18 20:44:06,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:44:07,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4736 backedges. 74 proven. 1998 refuted. 0 times theorem prover too weak. 2664 trivial. 0 not checked. [2022-03-18 20:44:07,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:44:12,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:44:12,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392425435] [2022-03-18 20:44:12,631 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:44:12,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878249223] [2022-03-18 20:44:12,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878249223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:44:12,632 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:44:12,632 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2022-03-18 20:44:12,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608214581] [2022-03-18 20:44:12,632 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:44:12,632 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-03-18 20:44:12,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:44:12,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-03-18 20:44:12,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1460, Invalid=4860, Unknown=0, NotChecked=0, Total=6320 [2022-03-18 20:44:12,633 INFO L87 Difference]: Start difference. First operand 136 states and 171 transitions. Second operand has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-18 20:44:14,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:44:14,219 INFO L93 Difference]: Finished difference Result 142 states and 178 transitions. [2022-03-18 20:44:14,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-18 20:44:14,219 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) Word has length 275 [2022-03-18 20:44:14,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:44:14,220 INFO L225 Difference]: With dead ends: 142 [2022-03-18 20:44:14,220 INFO L226 Difference]: Without dead ends: 139 [2022-03-18 20:44:14,220 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 453 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1470, Invalid=5172, Unknown=0, NotChecked=0, Total=6642 [2022-03-18 20:44:14,221 INFO L912 BasicCegarLoop]: 130 mSDtfsCounter, 2 mSDsluCounter, 3639 mSDsCounter, 0 mSdLazyCounter, 3047 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3769 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 20:44:14,221 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3769 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3047 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 20:44:14,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-18 20:44:14,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-18 20:44:14,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 42 states have call successors, (42), 6 states have call predecessors, (42), 4 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2022-03-18 20:44:14,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 175 transitions. [2022-03-18 20:44:14,223 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 175 transitions. Word has length 275 [2022-03-18 20:44:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:44:14,224 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 175 transitions. [2022-03-18 20:44:14,224 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.1219512195121952) internal successors, (87), 41 states have internal predecessors, (87), 39 states have call successors, (41), 2 states have call predecessors, (41), 1 states have return successors, (39), 38 states have call predecessors, (39), 38 states have call successors, (39) [2022-03-18 20:44:14,224 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 175 transitions. [2022-03-18 20:44:14,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2022-03-18 20:44:14,225 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:44:14,225 INFO L500 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:44:14,244 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-03-18 20:44:14,443 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-18 20:44:14,443 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:44:14,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:44:14,444 INFO L85 PathProgramCache]: Analyzing trace with hash -355173998, now seen corresponding path program 37 times [2022-03-18 20:44:14,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:44:14,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903808040] [2022-03-18 20:44:14,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:44:14,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:44:14,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:44:14,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [181453339] [2022-03-18 20:44:14,450 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-18 20:44:14,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:44:14,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:44:14,451 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:44:14,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-18 20:44:15,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 20:44:15,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 707 conjuncts, 156 conjunts are in the unsatisfiable core [2022-03-18 20:44:15,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:44:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4997 backedges. 76 proven. 2109 refuted. 0 times theorem prover too weak. 2812 trivial. 0 not checked. [2022-03-18 20:44:16,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:44:17,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:44:17,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903808040] [2022-03-18 20:44:17,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:44:17,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181453339] [2022-03-18 20:44:17,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181453339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:44:17,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:44:17,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2022-03-18 20:44:17,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270810894] [2022-03-18 20:44:17,051 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:44:17,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-18 20:44:17,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:44:17,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-18 20:44:17,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1938, Unknown=0, NotChecked=0, Total=2070 [2022-03-18 20:44:17,052 INFO L87 Difference]: Start difference. First operand 139 states and 175 transitions. Second operand has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-18 20:44:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:44:18,588 INFO L93 Difference]: Finished difference Result 145 states and 182 transitions. [2022-03-18 20:44:18,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-18 20:44:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) Word has length 282 [2022-03-18 20:44:18,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:44:18,589 INFO L225 Difference]: With dead ends: 145 [2022-03-18 20:44:18,589 INFO L226 Difference]: Without dead ends: 142 [2022-03-18 20:44:18,590 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 20:44:18,590 INFO L912 BasicCegarLoop]: 133 mSDtfsCounter, 2 mSDsluCounter, 3812 mSDsCounter, 0 mSdLazyCounter, 3205 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 3945 SdHoareTripleChecker+Invalid, 3205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 20:44:18,590 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 3945 Invalid, 3205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3205 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 20:44:18,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-18 20:44:18,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2022-03-18 20:44:18,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 43 states have call successors, (43), 6 states have call predecessors, (43), 4 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2022-03-18 20:44:18,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 179 transitions. [2022-03-18 20:44:18,593 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 179 transitions. Word has length 282 [2022-03-18 20:44:18,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:44:18,593 INFO L478 AbstractCegarLoop]: Abstraction has 142 states and 179 transitions. [2022-03-18 20:44:18,593 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.119047619047619) internal successors, (89), 42 states have internal predecessors, (89), 40 states have call successors, (42), 2 states have call predecessors, (42), 1 states have return successors, (40), 39 states have call predecessors, (40), 39 states have call successors, (40) [2022-03-18 20:44:18,593 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 179 transitions. [2022-03-18 20:44:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-03-18 20:44:18,594 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:44:18,594 INFO L500 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:44:18,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-18 20:44:18,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-18 20:44:18,801 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:44:18,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:44:18,802 INFO L85 PathProgramCache]: Analyzing trace with hash 882918400, now seen corresponding path program 38 times [2022-03-18 20:44:18,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:44:18,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582351893] [2022-03-18 20:44:18,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:44:18,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:44:18,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:44:18,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228377952] [2022-03-18 20:44:18,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 20:44:18,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:44:18,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:44:18,810 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:44:18,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-18 20:44:20,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 20:44:20,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:44:20,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 724 conjuncts, 160 conjunts are in the unsatisfiable core [2022-03-18 20:44:20,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:44:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5265 backedges. 78 proven. 2223 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2022-03-18 20:44:21,334 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:44:21,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:44:21,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582351893] [2022-03-18 20:44:21,604 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:44:21,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228377952] [2022-03-18 20:44:21,604 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228377952] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:44:21,604 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:44:21,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2022-03-18 20:44:21,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587678393] [2022-03-18 20:44:21,604 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:44:21,605 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-03-18 20:44:21,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:44:21,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-03-18 20:44:21,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2027, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 20:44:21,605 INFO L87 Difference]: Start difference. First operand 142 states and 179 transitions. Second operand has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-18 20:44:23,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:44:23,209 INFO L93 Difference]: Finished difference Result 148 states and 186 transitions. [2022-03-18 20:44:23,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-18 20:44:23,209 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) Word has length 289 [2022-03-18 20:44:23,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:44:23,210 INFO L225 Difference]: With dead ends: 148 [2022-03-18 20:44:23,210 INFO L226 Difference]: Without dead ends: 145 [2022-03-18 20:44:23,210 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 255 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=145, Invalid=2207, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 20:44:23,211 INFO L912 BasicCegarLoop]: 136 mSDtfsCounter, 2 mSDsluCounter, 3989 mSDsCounter, 0 mSdLazyCounter, 3367 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4125 SdHoareTripleChecker+Invalid, 3367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3367 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-18 20:44:23,211 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4125 Invalid, 3367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3367 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-18 20:44:23,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-18 20:44:23,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-18 20:44:23,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 44 states have call successors, (44), 6 states have call predecessors, (44), 4 states have return successors, (42), 42 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-18 20:44:23,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 183 transitions. [2022-03-18 20:44:23,213 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 183 transitions. Word has length 289 [2022-03-18 20:44:23,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:44:23,214 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 183 transitions. [2022-03-18 20:44:23,214 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.116279069767442) internal successors, (91), 43 states have internal predecessors, (91), 41 states have call successors, (43), 2 states have call predecessors, (43), 1 states have return successors, (41), 40 states have call predecessors, (41), 40 states have call successors, (41) [2022-03-18 20:44:23,214 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 183 transitions. [2022-03-18 20:44:23,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2022-03-18 20:44:23,215 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:44:23,215 INFO L500 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:44:23,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-18 20:44:23,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-03-18 20:44:23,415 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:44:23,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:44:23,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1331789358, now seen corresponding path program 39 times [2022-03-18 20:44:23,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:44:23,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552794729] [2022-03-18 20:44:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:44:23,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:44:23,424 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:44:23,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [287395756] [2022-03-18 20:44:23,424 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 20:44:23,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:44:23,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:44:23,426 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:44:23,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-18 20:44:56,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2022-03-18 20:44:56,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:44:56,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 164 conjunts are in the unsatisfiable core [2022-03-18 20:44:56,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:44:57,784 INFO L134 CoverageAnalysis]: Checked inductivity of 5540 backedges. 80 proven. 2340 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2022-03-18 20:44:57,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:44:58,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:44:58,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552794729] [2022-03-18 20:44:58,049 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:44:58,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287395756] [2022-03-18 20:44:58,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287395756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:44:58,049 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:44:58,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2022-03-18 20:44:58,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679343517] [2022-03-18 20:44:58,049 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:44:58,049 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-18 20:44:58,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:44:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-18 20:44:58,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2022-03-18 20:44:58,050 INFO L87 Difference]: Start difference. First operand 145 states and 183 transitions. Second operand has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-18 20:44:59,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:44:59,731 INFO L93 Difference]: Finished difference Result 151 states and 190 transitions. [2022-03-18 20:44:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-18 20:44:59,731 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) Word has length 296 [2022-03-18 20:44:59,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:44:59,732 INFO L225 Difference]: With dead ends: 151 [2022-03-18 20:44:59,732 INFO L226 Difference]: Without dead ends: 148 [2022-03-18 20:44:59,732 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 261 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=2302, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 20:44:59,732 INFO L912 BasicCegarLoop]: 139 mSDtfsCounter, 2 mSDsluCounter, 4170 mSDsCounter, 0 mSdLazyCounter, 3533 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4309 SdHoareTripleChecker+Invalid, 3533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-18 20:44:59,732 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4309 Invalid, 3533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3533 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-18 20:44:59,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-03-18 20:44:59,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-03-18 20:44:59,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 45 states have call successors, (45), 6 states have call predecessors, (45), 4 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2022-03-18 20:44:59,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 187 transitions. [2022-03-18 20:44:59,735 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 187 transitions. Word has length 296 [2022-03-18 20:44:59,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:44:59,735 INFO L478 AbstractCegarLoop]: Abstraction has 148 states and 187 transitions. [2022-03-18 20:44:59,735 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 44 states have internal predecessors, (93), 42 states have call successors, (44), 2 states have call predecessors, (44), 1 states have return successors, (42), 41 states have call predecessors, (42), 41 states have call successors, (42) [2022-03-18 20:44:59,736 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 187 transitions. [2022-03-18 20:44:59,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-03-18 20:44:59,737 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:44:59,737 INFO L500 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:44:59,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-03-18 20:44:59,958 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:44:59,959 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:44:59,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:44:59,959 INFO L85 PathProgramCache]: Analyzing trace with hash 961049536, now seen corresponding path program 40 times [2022-03-18 20:44:59,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:44:59,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980509475] [2022-03-18 20:44:59,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:44:59,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:44:59,966 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:44:59,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [401746936] [2022-03-18 20:44:59,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 20:44:59,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:44:59,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:44:59,967 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:44:59,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-18 20:45:01,145 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 20:45:01,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 20:45:01,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 168 conjunts are in the unsatisfiable core [2022-03-18 20:45:01,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 20:45:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5822 backedges. 82 proven. 2460 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2022-03-18 20:45:02,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 20:45:02,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 20:45:02,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980509475] [2022-03-18 20:45:02,658 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 20:45:02,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401746936] [2022-03-18 20:45:02,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401746936] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-18 20:45:02,658 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-18 20:45:02,659 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2022-03-18 20:45:02,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992850565] [2022-03-18 20:45:02,659 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-18 20:45:02,659 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-03-18 20:45:02,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 20:45:02,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-03-18 20:45:02,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2211, Unknown=0, NotChecked=0, Total=2352 [2022-03-18 20:45:02,660 INFO L87 Difference]: Start difference. First operand 148 states and 187 transitions. Second operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-18 20:45:04,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 20:45:04,540 INFO L93 Difference]: Finished difference Result 154 states and 194 transitions. [2022-03-18 20:45:04,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 20:45:04,540 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) Word has length 303 [2022-03-18 20:45:04,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 20:45:04,541 INFO L225 Difference]: With dead ends: 154 [2022-03-18 20:45:04,541 INFO L226 Difference]: Without dead ends: 151 [2022-03-18 20:45:04,541 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 267 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=151, Invalid=2399, Unknown=0, NotChecked=0, Total=2550 [2022-03-18 20:45:04,542 INFO L912 BasicCegarLoop]: 142 mSDtfsCounter, 2 mSDsluCounter, 4355 mSDsCounter, 0 mSdLazyCounter, 3703 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 4497 SdHoareTripleChecker+Invalid, 3703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3703 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-03-18 20:45:04,542 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 4497 Invalid, 3703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3703 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-03-18 20:45:04,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-18 20:45:04,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-18 20:45:04,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 46 states have call successors, (46), 6 states have call predecessors, (46), 4 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-03-18 20:45:04,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 191 transitions. [2022-03-18 20:45:04,545 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 191 transitions. Word has length 303 [2022-03-18 20:45:04,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 20:45:04,547 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 191 transitions. [2022-03-18 20:45:04,547 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 43 states have call successors, (45), 2 states have call predecessors, (45), 1 states have return successors, (43), 42 states have call predecessors, (43), 42 states have call successors, (43) [2022-03-18 20:45:04,547 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 191 transitions. [2022-03-18 20:45:04,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2022-03-18 20:45:04,548 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 20:45:04,548 INFO L500 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 20:45:04,555 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-03-18 20:45:04,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:45:04,755 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 20:45:04,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 20:45:04,755 INFO L85 PathProgramCache]: Analyzing trace with hash -552265198, now seen corresponding path program 41 times [2022-03-18 20:45:04,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 20:45:04,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964646934] [2022-03-18 20:45:04,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 20:45:04,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 20:45:04,763 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 20:45:04,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537386945] [2022-03-18 20:45:04,763 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 20:45:04,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 20:45:04,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 20:45:04,764 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 20:45:04,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process