/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_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-7390193 [2022-04-05 03:49:21,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-05 03:49:21,732 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-05 03:49:21,786 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-05 03:49:21,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-05 03:49:21,816 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-05 03:49:21,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-05 03:49:21,817 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2022-04-05 03:49:21,822 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-05 03:49:21,822 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-05 03:49:21,823 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-05 03:49:21,823 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-05 03:49:21,823 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-05 03:49:21,823 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-05 03:49:21,823 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-05 03:49:21,823 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-05 03:49:21,823 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-05 03:49:21,823 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-05 03:49:21,824 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-05 03:49:21,824 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-05 03:49:21,824 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-05 03:49:21,824 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-05 03:49:21,824 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-05 03:49:21,824 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-05 03:49:21,824 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-05 03:49:21,824 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-05 03:49:21,825 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 03:49:21,825 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-05 03:49:21,825 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-04-05 03:49:21,825 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-04-05 03:49:21,825 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-05 03:49:22,002 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-05 03:49:22,016 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-05 03:49:22,018 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-05 03:49:22,019 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-05 03:49:22,020 INFO L275 PluginConnector]: CDTParser initialized [2022-04-05 03:49:22,020 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound10.c [2022-04-05 03:49:22,066 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23013c4e3/013ce4e28f6745de8763ccb616ce383f/FLAGd98330713 [2022-04-05 03:49:22,412 INFO L306 CDTParser]: Found 1 translation units. [2022-04-05 03:49:22,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound10.c [2022-04-05 03:49:22,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23013c4e3/013ce4e28f6745de8763ccb616ce383f/FLAGd98330713 [2022-04-05 03:49:22,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/23013c4e3/013ce4e28f6745de8763ccb616ce383f [2022-04-05 03:49:22,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-05 03:49:22,425 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-04-05 03:49:22,426 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-05 03:49:22,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-05 03:49:22,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-05 03:49:22,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31afad9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22, skipping insertion in model container [2022-04-05 03:49:22,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,435 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-05 03:49:22,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-05 03:49:22,548 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_valuebound10.c[458,471] [2022-04-05 03:49:22,557 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 03:49:22,561 INFO L203 MainTranslator]: Completed pre-run [2022-04-05 03:49:22,568 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_valuebound10.c[458,471] [2022-04-05 03:49:22,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-05 03:49:22,579 INFO L208 MainTranslator]: Completed translation [2022-04-05 03:49:22,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22 WrapperNode [2022-04-05 03:49:22,579 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-05 03:49:22,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-05 03:49:22,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-05 03:49:22,580 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-05 03:49:22,586 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,590 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,590 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,593 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,595 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,599 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,606 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-05 03:49:22,606 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-05 03:49:22,607 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-05 03:49:22,607 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-05 03:49:22,607 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-05 03:49:22,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:22,631 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) [2022-04-05 03:49:22,632 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 [2022-04-05 03:49:22,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-05 03:49:22,654 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-05 03:49:22,654 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-05 03:49:22,654 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-05 03:49:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-05 03:49:22,655 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-05 03:49:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-05 03:49:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-05 03:49:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-05 03:49:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-05 03:49:22,655 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-05 03:49:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-05 03:49:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-05 03:49:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-05 03:49:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-05 03:49:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-05 03:49:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-05 03:49:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-05 03:49:22,656 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-05 03:49:22,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-05 03:49:22,697 INFO L234 CfgBuilder]: Building ICFG [2022-04-05 03:49:22,698 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-05 03:49:22,763 INFO L275 CfgBuilder]: Performing block encoding [2022-04-05 03:49:22,767 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-05 03:49:22,767 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-05 03:49:22,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 03:49:22 BoogieIcfgContainer [2022-04-05 03:49:22,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-05 03:49:22,769 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-04-05 03:49:22,769 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-04-05 03:49:22,771 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-04-05 03:49:22,774 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 03:49:22" (1/1) ... [2022-04-05 03:49:22,775 INFO L168 ansformationObserver]: Applying ICFG transformation LOOP_ACCELERATION_JORDAN [2022-04-05 03:49:22,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 03:49:22 BasicIcfg [2022-04-05 03:49:22,797 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-04-05 03:49:22,798 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-05 03:49:22,798 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-05 03:49:22,804 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-05 03:49:22,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.04 03:49:22" (1/4) ... [2022-04-05 03:49:22,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb88cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 03:49:22, skipping insertion in model container [2022-04-05 03:49:22,808 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.04 03:49:22" (2/4) ... [2022-04-05 03:49:22,808 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb88cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.04 03:49:22, skipping insertion in model container [2022-04-05 03:49:22,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.04 03:49:22" (3/4) ... [2022-04-05 03:49:22,809 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb88cc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 03:49:22, skipping insertion in model container [2022-04-05 03:49:22,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 05.04 03:49:22" (4/4) ... [2022-04-05 03:49:22,810 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound10.cJordan [2022-04-05 03:49:22,813 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2022-04-05 03:49:22,813 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-05 03:49:22,852 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-05 03:49:22,856 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 [2022-04-05 03:49:22,857 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-05 03:49:22,880 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) [2022-04-05 03:49:22,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 03:49:22,886 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:22,886 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:49:22,887 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:22,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:22,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1885409022, now seen corresponding path program 1 times [2022-04-05 03:49:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:22,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056389617] [2022-04-05 03:49:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:22,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:22,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:49:23,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-05 03:49:23,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:49:23,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-05 03:49:23,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:49:23,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 03:49:23,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:23,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056389617] [2022-04-05 03:49:23,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056389617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:49:23,055 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:49:23,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-05 03:49:23,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700034070] [2022-04-05 03:49:23,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:49:23,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-05 03:49:23,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:23,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-05 03:49:23,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-05 03:49:23,087 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) [2022-04-05 03:49:23,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:23,136 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-04-05 03:49:23,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-05 03:49:23,138 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 [2022-04-05 03:49:23,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:23,148 INFO L225 Difference]: With dead ends: 28 [2022-04-05 03:49:23,148 INFO L226 Difference]: Without dead ends: 23 [2022-04-05 03:49:23,149 INFO L912 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 [2022-04-05 03:49:23,154 INFO L913 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 [2022-04-05 03:49:23,155 INFO L914 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] [2022-04-05 03:49:23,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-05 03:49:23,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-05 03:49:23,179 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) [2022-04-05 03:49:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-04-05 03:49:23,180 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-04-05 03:49:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:23,181 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-04-05 03:49:23,181 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) [2022-04-05 03:49:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-04-05 03:49:23,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-05 03:49:23,182 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:23,182 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:49:23,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-05 03:49:23,182 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:23,183 INFO L85 PathProgramCache]: Analyzing trace with hash 603980644, now seen corresponding path program 1 times [2022-04-05 03:49:23,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:23,183 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835216773] [2022-04-05 03:49:23,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:23,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:23,208 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:23,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1339214342] [2022-04-05 03:49:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:23,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:23,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:23,210 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) [2022-04-05 03:49:23,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-05 03:49:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:49:23,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-05 03:49:23,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 03:49:23,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 03:49:23,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:23,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835216773] [2022-04-05 03:49:23,359 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:23,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339214342] [2022-04-05 03:49:23,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339214342] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:49:23,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:49:23,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-05 03:49:23,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867318617] [2022-04-05 03:49:23,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:49:23,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 03:49:23,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:23,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 03:49:23,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-05 03:49:23,361 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) [2022-04-05 03:49:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:23,401 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2022-04-05 03:49:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 03:49:23,402 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 [2022-04-05 03:49:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:23,404 INFO L225 Difference]: With dead ends: 32 [2022-04-05 03:49:23,406 INFO L226 Difference]: Without dead ends: 30 [2022-04-05 03:49:23,406 INFO L912 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 [2022-04-05 03:49:23,407 INFO L913 BasicCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:23,407 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 77 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:49:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-05 03:49:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-05 03:49:23,411 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) [2022-04-05 03:49:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-05 03:49:23,415 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-04-05 03:49:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:23,416 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-05 03:49:23,416 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) [2022-04-05 03:49:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-05 03:49:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-05 03:49:23,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:23,418 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-05 03:49:23,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:23,619 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 [2022-04-05 03:49:23,622 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:23,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:23,632 INFO L85 PathProgramCache]: Analyzing trace with hash -169450186, now seen corresponding path program 1 times [2022-04-05 03:49:23,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:23,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205363218] [2022-04-05 03:49:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:23,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:23,643 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:23,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [344631496] [2022-04-05 03:49:23,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:23,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:23,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:23,650 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) [2022-04-05 03:49:23,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-05 03:49:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:49:23,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-05 03:49:23,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:23,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-05 03:49:23,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:24,209 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-05 03:49:24,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:24,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205363218] [2022-04-05 03:49:24,210 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:24,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344631496] [2022-04-05 03:49:24,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344631496] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:24,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:24,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-05 03:49:24,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490928935] [2022-04-05 03:49:24,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:49:24,211 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-05 03:49:24,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:24,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-05 03:49:24,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-05 03:49:24,212 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) [2022-04-05 03:49:24,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:24,246 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2022-04-05 03:49:24,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-05 03:49:24,246 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 [2022-04-05 03:49:24,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:24,248 INFO L225 Difference]: With dead ends: 34 [2022-04-05 03:49:24,248 INFO L226 Difference]: Without dead ends: 31 [2022-04-05 03:49:24,249 INFO L912 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 [2022-04-05 03:49:24,252 INFO L913 BasicCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:24,253 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 70 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:49:24,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-05 03:49:24,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-05 03:49:24,261 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) [2022-04-05 03:49:24,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-04-05 03:49:24,263 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-04-05 03:49:24,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:24,264 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-04-05 03:49:24,264 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) [2022-04-05 03:49:24,264 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-04-05 03:49:24,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-05 03:49:24,265 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:24,265 INFO L499 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] [2022-04-05 03:49:24,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:24,475 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 [2022-04-05 03:49:24,475 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -434891502, now seen corresponding path program 1 times [2022-04-05 03:49:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:24,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502902054] [2022-04-05 03:49:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:24,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:24,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:24,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271467057] [2022-04-05 03:49:24,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:24,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:24,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:24,487 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) [2022-04-05 03:49:24,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-05 03:49:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:49:24,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-05 03:49:24,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-05 03:49:24,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:24,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:24,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502902054] [2022-04-05 03:49:24,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:24,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271467057] [2022-04-05 03:49:24,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271467057] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:24,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:24,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-05 03:49:24,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829903932] [2022-04-05 03:49:24,809 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:49:24,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-05 03:49:24,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:24,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-05 03:49:24,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-05 03:49:24,810 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) [2022-04-05 03:49:24,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:24,870 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2022-04-05 03:49:24,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-05 03:49:24,870 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 [2022-04-05 03:49:24,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:24,871 INFO L225 Difference]: With dead ends: 37 [2022-04-05 03:49:24,871 INFO L226 Difference]: Without dead ends: 34 [2022-04-05 03:49:24,871 INFO L912 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 [2022-04-05 03:49:24,872 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 2 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:24,872 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 115 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:49:24,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-05 03:49:24,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-05 03:49:24,875 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) [2022-04-05 03:49:24,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-04-05 03:49:24,876 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-04-05 03:49:24,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:24,876 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-04-05 03:49:24,876 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) [2022-04-05 03:49:24,876 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-04-05 03:49:24,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-05 03:49:24,877 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:24,877 INFO L499 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] [2022-04-05 03:49:24,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:25,087 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 [2022-04-05 03:49:25,088 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:25,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:25,088 INFO L85 PathProgramCache]: Analyzing trace with hash 725792896, now seen corresponding path program 2 times [2022-04-05 03:49:25,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:25,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588796826] [2022-04-05 03:49:25,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:25,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:25,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:25,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [212441826] [2022-04-05 03:49:25,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 03:49:25,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:25,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:25,106 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) [2022-04-05 03:49:25,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-05 03:49:25,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 03:49:25,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:49:25,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-05 03:49:25,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:25,325 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-05 03:49:25,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:25,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:25,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588796826] [2022-04-05 03:49:25,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:25,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212441826] [2022-04-05 03:49:25,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212441826] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:25,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:25,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-05 03:49:25,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844182551] [2022-04-05 03:49:25,422 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:49:25,422 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-05 03:49:25,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:25,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-05 03:49:25,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-05 03:49:25,423 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) [2022-04-05 03:49:25,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:25,484 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2022-04-05 03:49:25,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-05 03:49:25,484 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 [2022-04-05 03:49:25,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:25,485 INFO L225 Difference]: With dead ends: 40 [2022-04-05 03:49:25,485 INFO L226 Difference]: Without dead ends: 37 [2022-04-05 03:49:25,485 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-05 03:49:25,485 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 2 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 143 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 [2022-04-05 03:49:25,486 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 143 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:49:25,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-05 03:49:25,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-05 03:49:25,488 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) [2022-04-05 03:49:25,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-04-05 03:49:25,488 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-04-05 03:49:25,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:25,489 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-04-05 03:49:25,489 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) [2022-04-05 03:49:25,489 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-04-05 03:49:25,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-05 03:49:25,489 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:25,490 INFO L499 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] [2022-04-05 03:49:25,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-05 03:49:25,695 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 [2022-04-05 03:49:25,695 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:25,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:25,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1487404370, now seen corresponding path program 3 times [2022-04-05 03:49:25,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:25,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758041874] [2022-04-05 03:49:25,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:25,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:25,703 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:25,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1981271903] [2022-04-05 03:49:25,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 03:49:25,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:25,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:25,704 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) [2022-04-05 03:49:25,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-05 03:49:25,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-04-05 03:49:25,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:49:25,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-05 03:49:25,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-05 03:49:25,936 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:26,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:26,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758041874] [2022-04-05 03:49:26,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:26,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981271903] [2022-04-05 03:49:26,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981271903] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:26,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:26,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-05 03:49:26,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267638939] [2022-04-05 03:49:26,046 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:49:26,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-05 03:49:26,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:26,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-05 03:49:26,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-05 03:49:26,047 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) [2022-04-05 03:49:26,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:26,125 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2022-04-05 03:49:26,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-05 03:49:26,126 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 [2022-04-05 03:49:26,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:26,126 INFO L225 Difference]: With dead ends: 43 [2022-04-05 03:49:26,126 INFO L226 Difference]: Without dead ends: 40 [2022-04-05 03:49:26,127 INFO L912 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 [2022-04-05 03:49:26,133 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:26,133 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 173 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:49:26,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-05 03:49:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-05 03:49:26,136 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) [2022-04-05 03:49:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-04-05 03:49:26,137 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-04-05 03:49:26,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:26,137 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-04-05 03:49:26,137 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) [2022-04-05 03:49:26,137 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-04-05 03:49:26,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-05 03:49:26,138 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:26,138 INFO L499 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] [2022-04-05 03:49:26,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:26,343 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 [2022-04-05 03:49:26,343 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:26,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1178929216, now seen corresponding path program 4 times [2022-04-05 03:49:26,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:26,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659467280] [2022-04-05 03:49:26,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:26,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:26,352 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:26,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632711942] [2022-04-05 03:49:26,352 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 03:49:26,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:26,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:26,353 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) [2022-04-05 03:49:26,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-05 03:49:26,399 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 03:49:26,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:49:26,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-05 03:49:26,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-05 03:49:26,609 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:26,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:26,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659467280] [2022-04-05 03:49:26,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:26,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632711942] [2022-04-05 03:49:26,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632711942] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:26,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:26,890 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-05 03:49:26,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185340711] [2022-04-05 03:49:26,891 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:49:26,891 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-05 03:49:26,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:26,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-05 03:49:26,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-04-05 03:49:26,892 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) [2022-04-05 03:49:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:26,993 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-04-05 03:49:26,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-05 03:49:26,993 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 [2022-04-05 03:49:26,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:26,994 INFO L225 Difference]: With dead ends: 46 [2022-04-05 03:49:26,994 INFO L226 Difference]: Without dead ends: 43 [2022-04-05 03:49:26,994 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-04-05 03:49:26,995 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:26,995 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 202 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:49:26,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-05 03:49:26,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-05 03:49:26,997 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) [2022-04-05 03:49:26,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-04-05 03:49:26,998 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-04-05 03:49:26,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:26,998 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-04-05 03:49:26,998 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) [2022-04-05 03:49:26,998 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-04-05 03:49:26,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-05 03:49:26,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:26,999 INFO L499 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] [2022-04-05 03:49:27,031 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:27,199 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 [2022-04-05 03:49:27,199 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:27,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:27,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1658817134, now seen corresponding path program 5 times [2022-04-05 03:49:27,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:27,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319523963] [2022-04-05 03:49:27,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:27,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:27,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:27,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1661199625] [2022-04-05 03:49:27,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 03:49:27,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:27,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:27,212 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) [2022-04-05 03:49:27,213 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-05 03:49:27,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-04-05 03:49:27,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:49:27,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-05 03:49:27,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:27,532 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-05 03:49:27,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:27,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319523963] [2022-04-05 03:49:27,633 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:27,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661199625] [2022-04-05 03:49:27,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661199625] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:27,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:27,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-05 03:49:27,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134433105] [2022-04-05 03:49:27,633 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:49:27,633 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-05 03:49:27,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:27,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-05 03:49:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-05 03:49:27,634 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) [2022-04-05 03:49:27,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:27,741 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2022-04-05 03:49:27,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-05 03:49:27,742 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 [2022-04-05 03:49:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:27,742 INFO L225 Difference]: With dead ends: 49 [2022-04-05 03:49:27,742 INFO L226 Difference]: Without dead ends: 46 [2022-04-05 03:49:27,743 INFO L912 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 [2022-04-05 03:49:27,743 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 2 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:27,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 239 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:49:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-05 03:49:27,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-05 03:49:27,746 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) [2022-04-05 03:49:27,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-04-05 03:49:27,746 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-04-05 03:49:27,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:27,747 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-04-05 03:49:27,747 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) [2022-04-05 03:49:27,747 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-04-05 03:49:27,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-05 03:49:27,747 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:27,748 INFO L499 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] [2022-04-05 03:49:27,754 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:27,951 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 [2022-04-05 03:49:27,952 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:27,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:27,952 INFO L85 PathProgramCache]: Analyzing trace with hash 270583808, now seen corresponding path program 6 times [2022-04-05 03:49:27,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:27,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076687363] [2022-04-05 03:49:27,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:27,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:27,959 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:27,959 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [435373705] [2022-04-05 03:49:27,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-05 03:49:27,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:27,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:27,960 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) [2022-04-05 03:49:27,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-05 03:49:28,091 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-05 03:49:28,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:49:28,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-05 03:49:28,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:28,283 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-05 03:49:28,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:28,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:28,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076687363] [2022-04-05 03:49:28,369 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:28,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435373705] [2022-04-05 03:49:28,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435373705] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:28,370 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:28,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-05 03:49:28,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96188037] [2022-04-05 03:49:28,370 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:49:28,370 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-05 03:49:28,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:28,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-05 03:49:28,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-05 03:49:28,371 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) [2022-04-05 03:49:28,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:28,499 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2022-04-05 03:49:28,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-05 03:49:28,499 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 [2022-04-05 03:49:28,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:28,499 INFO L225 Difference]: With dead ends: 52 [2022-04-05 03:49:28,499 INFO L226 Difference]: Without dead ends: 49 [2022-04-05 03:49:28,500 INFO L912 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 [2022-04-05 03:49:28,500 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:28,500 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 275 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:49:28,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-05 03:49:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-04-05 03:49:28,503 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) [2022-04-05 03:49:28,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-04-05 03:49:28,503 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-04-05 03:49:28,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:28,503 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-04-05 03:49:28,503 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) [2022-04-05 03:49:28,504 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-04-05 03:49:28,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-05 03:49:28,504 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:28,504 INFO L499 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] [2022-04-05 03:49:28,511 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:28,707 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 [2022-04-05 03:49:28,707 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:28,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:28,708 INFO L85 PathProgramCache]: Analyzing trace with hash 4292050, now seen corresponding path program 7 times [2022-04-05 03:49:28,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:28,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117822942] [2022-04-05 03:49:28,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:28,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:28,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:28,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1342445894] [2022-04-05 03:49:28,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-04-05 03:49:28,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:28,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:28,735 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) [2022-04-05 03:49:28,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-05 03:49:29,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-05 03:49:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-05 03:49:29,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-05 03:49:29,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:29,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:29,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117822942] [2022-04-05 03:49:29,410 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:29,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342445894] [2022-04-05 03:49:29,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342445894] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:29,410 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:29,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-05 03:49:29,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15721550] [2022-04-05 03:49:29,411 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:49:29,411 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-05 03:49:29,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:29,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-05 03:49:29,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-05 03:49:29,411 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) [2022-04-05 03:49:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:29,568 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2022-04-05 03:49:29,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-05 03:49:29,569 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 [2022-04-05 03:49:29,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:29,569 INFO L225 Difference]: With dead ends: 55 [2022-04-05 03:49:29,569 INFO L226 Difference]: Without dead ends: 52 [2022-04-05 03:49:29,570 INFO L912 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 [2022-04-05 03:49:29,570 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 2 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:29,570 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 313 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-05 03:49:29,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-05 03:49:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-05 03:49:29,573 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) [2022-04-05 03:49:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-04-05 03:49:29,573 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-04-05 03:49:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:29,573 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-04-05 03:49:29,574 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) [2022-04-05 03:49:29,574 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-04-05 03:49:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-05 03:49:29,574 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:29,574 INFO L499 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] [2022-04-05 03:49:29,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:29,775 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 [2022-04-05 03:49:29,775 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:29,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:29,775 INFO L85 PathProgramCache]: Analyzing trace with hash 395442112, now seen corresponding path program 8 times [2022-04-05 03:49:29,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:29,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756711832] [2022-04-05 03:49:29,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:29,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:29,782 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:29,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1921789938] [2022-04-05 03:49:29,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-05 03:49:29,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:29,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:29,783 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) [2022-04-05 03:49:29,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-05 03:49:30,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-05 03:49:30,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:49:30,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-05 03:49:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-05 03:49:30,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:30,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:30,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756711832] [2022-04-05 03:49:30,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:30,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921789938] [2022-04-05 03:49:30,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921789938] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:30,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:30,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-05 03:49:30,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511413096] [2022-04-05 03:49:30,716 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:49:30,717 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-05 03:49:30,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:30,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-05 03:49:30,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-05 03:49:30,717 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) [2022-04-05 03:49:30,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:30,907 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2022-04-05 03:49:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-05 03:49:30,907 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 [2022-04-05 03:49:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:30,908 INFO L225 Difference]: With dead ends: 58 [2022-04-05 03:49:30,908 INFO L226 Difference]: Without dead ends: 55 [2022-04-05 03:49:30,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-04-05 03:49:30,909 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:30,909 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 353 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 03:49:30,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-05 03:49:30,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-05 03:49:30,911 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) [2022-04-05 03:49:30,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-04-05 03:49:30,912 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-04-05 03:49:30,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:30,912 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-04-05 03:49:30,912 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) [2022-04-05 03:49:30,912 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-04-05 03:49:30,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-05 03:49:30,913 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:30,913 INFO L499 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] [2022-04-05 03:49:30,920 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-04-05 03:49:31,118 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 [2022-04-05 03:49:31,118 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash 667883026, now seen corresponding path program 9 times [2022-04-05 03:49:31,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:31,119 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30883135] [2022-04-05 03:49:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:31,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:31,125 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:31,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1909753365] [2022-04-05 03:49:31,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-04-05 03:49:31,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:31,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:31,127 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) [2022-04-05 03:49:31,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-05 03:49:31,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-04-05 03:49:31,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:49:31,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-05 03:49:31,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:31,744 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-05 03:49:31,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:31,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:31,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30883135] [2022-04-05 03:49:31,950 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:31,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909753365] [2022-04-05 03:49:31,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909753365] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:31,951 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:31,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-05 03:49:31,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930456635] [2022-04-05 03:49:31,951 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:49:31,951 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-05 03:49:31,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:31,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-05 03:49:31,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-04-05 03:49:31,952 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) [2022-04-05 03:49:32,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:32,176 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2022-04-05 03:49:32,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-05 03:49:32,176 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 [2022-04-05 03:49:32,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:32,177 INFO L225 Difference]: With dead ends: 61 [2022-04-05 03:49:32,177 INFO L226 Difference]: Without dead ends: 58 [2022-04-05 03:49:32,177 INFO L912 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 [2022-04-05 03:49:32,177 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:32,178 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 393 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 03:49:32,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-05 03:49:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-05 03:49:32,180 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) [2022-04-05 03:49:32,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-04-05 03:49:32,180 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-04-05 03:49:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:32,181 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-04-05 03:49:32,181 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) [2022-04-05 03:49:32,181 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-04-05 03:49:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-05 03:49:32,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:32,181 INFO L499 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] [2022-04-05 03:49:32,190 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:32,390 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 [2022-04-05 03:49:32,390 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:32,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:32,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1918146432, now seen corresponding path program 10 times [2022-04-05 03:49:32,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:32,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658212853] [2022-04-05 03:49:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:32,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:32,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:32,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793615444] [2022-04-05 03:49:32,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-05 03:49:32,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:32,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:32,398 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) [2022-04-05 03:49:32,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-05 03:49:32,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-05 03:49:32,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:49:32,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-05 03:49:32,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:32,938 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-05 03:49:32,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-05 03:49:33,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:33,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658212853] [2022-04-05 03:49:33,065 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:33,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793615444] [2022-04-05 03:49:33,065 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793615444] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-05 03:49:33,065 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-05 03:49:33,065 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-05 03:49:33,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630653575] [2022-04-05 03:49:33,065 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-04-05 03:49:33,066 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 03:49:33,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:33,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 03:49:33,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-04-05 03:49:33,066 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) [2022-04-05 03:49:33,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:33,335 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2022-04-05 03:49:33,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 03:49:33,336 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 [2022-04-05 03:49:33,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:33,337 INFO L225 Difference]: With dead ends: 64 [2022-04-05 03:49:33,337 INFO L226 Difference]: Without dead ends: 61 [2022-04-05 03:49:33,337 INFO L912 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 [2022-04-05 03:49:33,337 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 2 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 439 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:33,337 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 439 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-05 03:49:33,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-05 03:49:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-05 03:49:33,340 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) [2022-04-05 03:49:33,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-04-05 03:49:33,340 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-04-05 03:49:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:33,341 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-04-05 03:49:33,341 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) [2022-04-05 03:49:33,341 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-04-05 03:49:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-05 03:49:33,341 INFO L491 BasicCegarLoop]: Found error trace [2022-04-05 03:49:33,341 INFO L499 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] [2022-04-05 03:49:33,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:33,542 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 [2022-04-05 03:49:33,542 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-05 03:49:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-05 03:49:33,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1384988242, now seen corresponding path program 11 times [2022-04-05 03:49:33,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-05 03:49:33,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935448818] [2022-04-05 03:49:33,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-05 03:49:33,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-05 03:49:33,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-05 03:49:33,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895477964] [2022-04-05 03:49:33,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-04-05 03:49:33,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-05 03:49:33,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-05 03:49:33,559 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) [2022-04-05 03:49:33,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-05 03:49:33,609 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-04-05 03:49:33,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-05 03:49:33,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-05 03:49:33,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-05 03:49:33,951 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 264 proven. 0 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2022-04-05 03:49:33,952 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-05 03:49:33,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-05 03:49:33,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935448818] [2022-04-05 03:49:33,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-05 03:49:33,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895477964] [2022-04-05 03:49:33,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895477964] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-05 03:49:33,952 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-05 03:49:33,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-05 03:49:33,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731598797] [2022-04-05 03:49:33,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-05 03:49:33,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-05 03:49:33,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-04-05 03:49:33,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-05 03:49:33,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2022-04-05 03:49:33,953 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-04-05 03:49:34,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-05 03:49:34,012 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2022-04-05 03:49:34,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-05 03:49:34,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-04-05 03:49:34,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-05 03:49:34,013 INFO L225 Difference]: With dead ends: 53 [2022-04-05 03:49:34,013 INFO L226 Difference]: Without dead ends: 0 [2022-04-05 03:49:34,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2022-04-05 03:49:34,013 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 4 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-05 03:49:34,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 168 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-05 03:49:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-05 03:49:34,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-05 03:49:34,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-05 03:49:34,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-05 03:49:34,014 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 100 [2022-04-05 03:49:34,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-05 03:49:34,014 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-05 03:49:34,014 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.4375) internal successors, (39), 15 states have internal predecessors, (39), 13 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 14 states have call predecessors, (14), 13 states have call successors, (14) [2022-04-05 03:49:34,014 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-05 03:49:34,014 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-05 03:49:34,016 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-05 03:49:34,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-05 03:49:34,217 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 [2022-04-05 03:49:34,219 INFO L719 BasicCegarLoop]: Path program histogram: [11, 1, 1, 1] [2022-04-05 03:49:34,220 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-05 03:49:34,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.04 03:49:34 BasicIcfg [2022-04-05 03:49:34,224 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-05 03:49:34,224 INFO L158 Benchmark]: Toolchain (without parser) took 11798.45ms. Allocated memory was 189.8MB in the beginning and 267.4MB in the end (delta: 77.6MB). Free memory was 140.7MB in the beginning and 210.7MB in the end (delta: -70.0MB). Peak memory consumption was 8.6MB. Max. memory is 8.0GB. [2022-04-05 03:49:34,224 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 189.8MB. Free memory was 157.0MB in the beginning and 157.0MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 03:49:34,224 INFO L158 Benchmark]: CACSL2BoogieTranslator took 153.23ms. Allocated memory is still 189.8MB. Free memory was 140.5MB in the beginning and 165.5MB in the end (delta: -25.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-04-05 03:49:34,224 INFO L158 Benchmark]: Boogie Preprocessor took 25.72ms. Allocated memory is still 189.8MB. Free memory was 165.5MB in the beginning and 163.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-05 03:49:34,225 INFO L158 Benchmark]: RCFGBuilder took 162.17ms. Allocated memory is still 189.8MB. Free memory was 163.9MB in the beginning and 154.0MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. [2022-04-05 03:49:34,225 INFO L158 Benchmark]: IcfgTransformer took 28.46ms. Allocated memory is still 189.8MB. Free memory was 154.0MB in the beginning and 152.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-05 03:49:34,225 INFO L158 Benchmark]: TraceAbstraction took 11425.41ms. Allocated memory was 189.8MB in the beginning and 267.4MB in the end (delta: 77.6MB). Free memory was 152.4MB in the beginning and 210.7MB in the end (delta: -58.3MB). Peak memory consumption was 19.8MB. Max. memory is 8.0GB. [2022-04-05 03:49:34,226 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 189.8MB. Free memory was 157.0MB in the beginning and 157.0MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 153.23ms. Allocated memory is still 189.8MB. Free memory was 140.5MB in the beginning and 165.5MB in the end (delta: -25.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 25.72ms. Allocated memory is still 189.8MB. Free memory was 165.5MB in the beginning and 163.9MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 162.17ms. Allocated memory is still 189.8MB. Free memory was 163.9MB in the beginning and 154.0MB in the end (delta: 9.9MB). Peak memory consumption was 9.4MB. Max. memory is 8.0GB. * IcfgTransformer took 28.46ms. Allocated memory is still 189.8MB. Free memory was 154.0MB in the beginning and 152.9MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 8.0GB. * TraceAbstraction took 11425.41ms. Allocated memory was 189.8MB in the beginning and 267.4MB in the end (delta: 77.6MB). Free memory was 152.4MB in the beginning and 210.7MB in the end (delta: -58.3MB). Peak memory consumption was 19.8MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11.4s, OverallIterations: 14, TraceHistogramMax: 13, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 1.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 58 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 51 mSDsluCounter, 2989 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2489 mSDsCounter, 21 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2534 IncrementalHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 21 mSolverCounterUnsat, 500 mSDtfsCounter, 2534 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 962 GetRequests, 774 SyntacticMatches, 12 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=61occurred in iteration=13, InterpolantAutomatonStates: 144, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 1.9s SatisfiabilityAnalysisTime, 4.5s InterpolantComputationTime, 773 NumberOfCodeBlocks, 769 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 782 ConstructedInterpolants, 0 QuantifiedInterpolants, 3026 SizeOfPredicates, 23 NumberOfNonLiveVariables, 2079 ConjunctsInSsa, 337 ConjunctsInUnsatCore, 15 InterpolantComputations, 4 PerfectInterpolantSequences, 1502/2164 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-04-05 03:49:34,239 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...