/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/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 18:19:42,731 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 18:19:42,743 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 18:19:42,797 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 18:19:42,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 18:19:42,805 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 18:19:42,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 18:19:42,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 18:19:42,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 18:19:42,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 18:19:42,815 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 18:19:42,820 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 18:19:42,823 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 18:19:42,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 18:19:42,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 18:19:42,827 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 18:19:42,828 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 18:19:42,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 18:19:42,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 18:19:42,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 18:19:42,838 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 18:19:42,838 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 18:19:42,846 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 18:19:42,846 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 18:19:42,848 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 18:19:42,848 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 18:19:42,848 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 18:19:42,848 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 18:19:42,848 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 18:19:42,848 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 18:19:42,848 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 18:19:42,849 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 18:19:42,849 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 18:19:42,849 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 18:19:42,849 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 18:19:42,849 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 18:19:42,849 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 18:19:42,849 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 18:19:42,849 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 18:19:42,849 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 18:19:42,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:19:42,849 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 18:19:42,850 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 18:19:42,850 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 18:19:42,850 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 18:19:42,850 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 18:19:42,850 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 18:19:42,850 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 18:19:43,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 18:19:43,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 18:19:43,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 18:19:43,113 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 18:19:43,113 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 18:19:43,114 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c [2022-04-06 18:19:43,193 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b00a6b1d/fa0a8b462ffe49a68e6c99d7cfb05dee/FLAGa35616e81 [2022-04-06 18:19:43,733 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 18:19:43,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps4-ll_valuebound20.c [2022-04-06 18:19:43,738 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b00a6b1d/fa0a8b462ffe49a68e6c99d7cfb05dee/FLAGa35616e81 [2022-04-06 18:19:44,203 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7b00a6b1d/fa0a8b462ffe49a68e6c99d7cfb05dee [2022-04-06 18:19:44,204 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 18:19:44,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 18:19:44,211 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 18:19:44,212 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 18:19:44,214 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 18:19:44,214 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:19:44" (1/1) ... [2022-04-06 18:19:44,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32b5391b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44, skipping insertion in model container [2022-04-06 18:19:44,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 06:19:44" (1/1) ... [2022-04-06 18:19:44,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 18:19:44,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 18:19:44,455 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_valuebound20.c[458,471] [2022-04-06 18:19:44,491 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:19:44,497 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 18:19:44,521 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_valuebound20.c[458,471] [2022-04-06 18:19:44,532 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 18:19:44,556 INFO L208 MainTranslator]: Completed translation [2022-04-06 18:19:44,557 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44 WrapperNode [2022-04-06 18:19:44,557 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 18:19:44,558 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 18:19:44,558 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 18:19:44,558 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 18:19:44,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44" (1/1) ... [2022-04-06 18:19:44,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44" (1/1) ... [2022-04-06 18:19:44,586 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44" (1/1) ... [2022-04-06 18:19:44,586 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44" (1/1) ... [2022-04-06 18:19:44,594 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44" (1/1) ... [2022-04-06 18:19:44,597 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44" (1/1) ... [2022-04-06 18:19:44,598 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44" (1/1) ... [2022-04-06 18:19:44,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 18:19:44,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 18:19:44,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 18:19:44,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 18:19:44,602 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44" (1/1) ... [2022-04-06 18:19:44,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 18:19:44,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:44,651 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) [2022-04-06 18:19:44,669 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 [2022-04-06 18:19:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 18:19:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 18:19:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 18:19:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 18:19:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 18:19:44,680 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 18:19:44,680 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 18:19:44,680 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 18:19:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 18:19:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 18:19:44,681 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2022-04-06 18:19:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 18:19:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 18:19:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 18:19:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 18:19:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 18:19:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 18:19:44,682 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 18:19:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 18:19:44,683 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 18:19:44,728 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 18:19:44,729 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 18:19:44,846 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 18:19:44,850 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 18:19:44,850 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 18:19:44,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:19:44 BoogieIcfgContainer [2022-04-06 18:19:44,851 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 18:19:44,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 18:19:44,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 18:19:44,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 18:19:44,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 06:19:44" (1/3) ... [2022-04-06 18:19:44,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94c4aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:19:44, skipping insertion in model container [2022-04-06 18:19:44,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 06:19:44" (2/3) ... [2022-04-06 18:19:44,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@94c4aba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 06:19:44, skipping insertion in model container [2022-04-06 18:19:44,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 06:19:44" (3/3) ... [2022-04-06 18:19:44,870 INFO L111 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound20.c [2022-04-06 18:19:44,873 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 18:19:44,873 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 18:19:44,947 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 18:19:44,951 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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 [2022-04-06 18:19:44,951 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 18:19:44,968 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) [2022-04-06 18:19:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 18:19:44,992 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:44,992 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:19:44,994 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:45,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:45,000 INFO L85 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 1 times [2022-04-06 18:19:45,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:45,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1305105419] [2022-04-06 18:19:45,015 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:19:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash -630235283, now seen corresponding path program 2 times [2022-04-06 18:19:45,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:45,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337014792] [2022-04-06 18:19:45,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:45,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:19:45,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 18:19:45,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:19:45,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 18:19:45,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 18:19:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:19:45,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:45,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337014792] [2022-04-06 18:19:45,193 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337014792] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:45,193 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:45,193 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:19:45,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:45,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1305105419] [2022-04-06 18:19:45,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1305105419] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:45,209 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:45,209 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 18:19:45,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875629850] [2022-04-06 18:19:45,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:45,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 18:19:45,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:45,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 18:19:45,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 18:19:45,233 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) [2022-04-06 18:19:45,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:45,324 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2022-04-06 18:19:45,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 18:19:45,339 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 [2022-04-06 18:19:45,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:45,344 INFO L225 Difference]: With dead ends: 47 [2022-04-06 18:19:45,345 INFO L226 Difference]: Without dead ends: 23 [2022-04-06 18:19:45,347 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 [2022-04-06 18:19:45,350 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, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:19:45,352 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 29 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 18:19:45,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-04-06 18:19:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-04-06 18:19:45,402 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) [2022-04-06 18:19:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-04-06 18:19:45,405 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 17 [2022-04-06 18:19:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:45,405 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-04-06 18:19:45,405 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) [2022-04-06 18:19:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-04-06 18:19:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 18:19:45,417 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:45,418 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:19:45,418 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 18:19:45,418 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:45,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:45,419 INFO L85 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 1 times [2022-04-06 18:19:45,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:45,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [702439547] [2022-04-06 18:19:45,426 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 18:19:45,426 INFO L85 PathProgramCache]: Analyzing trace with hash 51610547, now seen corresponding path program 2 times [2022-04-06 18:19:45,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:45,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57372340] [2022-04-06 18:19:45,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:45,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:45,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:45,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486113604] [2022-04-06 18:19:45,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:19:45,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:45,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:45,467 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) [2022-04-06 18:19:45,533 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 18:19:45,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 18:19:45,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:45,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 18:19:45,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:19:45,693 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:19:45,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:45,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57372340] [2022-04-06 18:19:45,693 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:45,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486113604] [2022-04-06 18:19:45,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486113604] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:45,694 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:45,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:19:45,695 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:45,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [702439547] [2022-04-06 18:19:45,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [702439547] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:45,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:45,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:19:45,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079249393] [2022-04-06 18:19:45,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:45,703 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:19:45,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:45,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:19:45,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 18:19:45,704 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) [2022-04-06 18:19:45,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:45,768 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-04-06 18:19:45,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:19:45,768 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 [2022-04-06 18:19:45,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:45,769 INFO L225 Difference]: With dead ends: 34 [2022-04-06 18:19:45,769 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 18:19:45,770 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 [2022-04-06 18:19:45,771 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 [2022-04-06 18:19:45,776 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] [2022-04-06 18:19:45,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 18:19:45,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 18:19:45,798 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) [2022-04-06 18:19:45,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-04-06 18:19:45,800 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 17 [2022-04-06 18:19:45,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:45,800 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-04-06 18:19:45,800 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) [2022-04-06 18:19:45,800 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-04-06 18:19:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-04-06 18:19:45,802 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:45,802 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] [2022-04-06 18:19:45,867 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-04-06 18:19:46,003 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 [2022-04-06 18:19:46,003 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:46,004 INFO L85 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 1 times [2022-04-06 18:19:46,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:46,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1781981402] [2022-04-06 18:19:46,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:46,026 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:46,027 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:46,027 INFO L85 PathProgramCache]: Analyzing trace with hash 311787922, now seen corresponding path program 2 times [2022-04-06 18:19:46,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:46,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659208467] [2022-04-06 18:19:46,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:46,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:46,059 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:46,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242528209] [2022-04-06 18:19:46,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:19:46,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:46,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:46,068 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) [2022-04-06 18:19:46,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 18:19:46,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:19:46,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:46,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 18:19:46,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 18:19:46,297 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:48,868 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-04-06 18:19:48,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:48,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659208467] [2022-04-06 18:19:48,869 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:48,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242528209] [2022-04-06 18:19:48,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242528209] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:48,869 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:48,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 18:19:48,869 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:48,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1781981402] [2022-04-06 18:19:48,870 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1781981402] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:48,870 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:48,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 18:19:48,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562501045] [2022-04-06 18:19:48,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:48,870 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 18:19:48,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:48,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 18:19:48,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=28, Unknown=1, NotChecked=0, Total=42 [2022-04-06 18:19:48,879 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) [2022-04-06 18:19:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:48,928 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2022-04-06 18:19:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 18:19:48,928 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 [2022-04-06 18:19:48,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:48,929 INFO L225 Difference]: With dead ends: 36 [2022-04-06 18:19:48,929 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 18:19:48,929 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=17, Invalid=38, Unknown=1, NotChecked=0, Total=56 [2022-04-06 18:19:48,930 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 [2022-04-06 18:19:48,930 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] [2022-04-06 18:19:48,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 18:19:48,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 18:19:48,935 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) [2022-04-06 18:19:48,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-04-06 18:19:48,935 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 24 [2022-04-06 18:19:48,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:48,936 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-04-06 18:19:48,936 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) [2022-04-06 18:19:48,936 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-04-06 18:19:48,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-04-06 18:19:48,936 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:48,936 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] [2022-04-06 18:19:48,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 18:19:49,151 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 [2022-04-06 18:19:49,152 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:49,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 1 times [2022-04-06 18:19:49,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:49,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815699334] [2022-04-06 18:19:49,155 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:49,156 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:49,156 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1417466424, now seen corresponding path program 2 times [2022-04-06 18:19:49,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:49,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589446282] [2022-04-06 18:19:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:49,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:49,164 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:49,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1121868031] [2022-04-06 18:19:49,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:19:49,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:49,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:49,180 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) [2022-04-06 18:19:49,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 18:19:49,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:19:49,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:49,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2022-04-06 18:19:49,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 18:19:49,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:49,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:49,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589446282] [2022-04-06 18:19:49,591 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:49,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121868031] [2022-04-06 18:19:49,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121868031] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:49,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:49,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 18:19:49,592 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:49,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815699334] [2022-04-06 18:19:49,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815699334] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:49,592 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:49,592 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 18:19:49,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112017735] [2022-04-06 18:19:49,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:49,592 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 18:19:49,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:49,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 18:19:49,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 18:19:49,593 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) [2022-04-06 18:19:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:49,670 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2022-04-06 18:19:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 18:19:49,671 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 [2022-04-06 18:19:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:49,672 INFO L225 Difference]: With dead ends: 39 [2022-04-06 18:19:49,672 INFO L226 Difference]: Without dead ends: 34 [2022-04-06 18:19:49,672 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 [2022-04-06 18:19:49,673 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 [2022-04-06 18:19:49,673 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] [2022-04-06 18:19:49,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-04-06 18:19:49,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-04-06 18:19:49,687 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) [2022-04-06 18:19:49,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-04-06 18:19:49,699 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 30 [2022-04-06 18:19:49,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:49,699 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-04-06 18:19:49,700 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) [2022-04-06 18:19:49,700 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-04-06 18:19:49,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 18:19:49,701 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:49,701 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] [2022-04-06 18:19:49,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 18:19:49,920 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 [2022-04-06 18:19:49,923 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:49,923 INFO L85 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 3 times [2022-04-06 18:19:49,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:49,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [113044130] [2022-04-06 18:19:49,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:49,926 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:49,926 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:49,926 INFO L85 PathProgramCache]: Analyzing trace with hash -2045316535, now seen corresponding path program 4 times [2022-04-06 18:19:49,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:49,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609853738] [2022-04-06 18:19:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:49,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:49,933 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:49,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928485097] [2022-04-06 18:19:49,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 18:19:49,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:49,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:49,934 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) [2022-04-06 18:19:49,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 18:19:49,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 18:19:49,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:49,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 18:19:49,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:50,124 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 18:19:50,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:50,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:50,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609853738] [2022-04-06 18:19:50,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:50,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928485097] [2022-04-06 18:19:50,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928485097] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:50,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:50,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 18:19:50,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:50,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [113044130] [2022-04-06 18:19:50,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [113044130] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:50,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:50,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 18:19:50,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666529371] [2022-04-06 18:19:50,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:50,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 18:19:50,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:50,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 18:19:50,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 18:19:50,259 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) [2022-04-06 18:19:50,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:50,325 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2022-04-06 18:19:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 18:19:50,326 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 [2022-04-06 18:19:50,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:50,327 INFO L225 Difference]: With dead ends: 42 [2022-04-06 18:19:50,327 INFO L226 Difference]: Without dead ends: 37 [2022-04-06 18:19:50,327 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 [2022-04-06 18:19:50,328 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 [2022-04-06 18:19:50,328 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] [2022-04-06 18:19:50,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-04-06 18:19:50,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-04-06 18:19:50,332 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) [2022-04-06 18:19:50,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-04-06 18:19:50,333 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 37 [2022-04-06 18:19:50,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:50,334 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-04-06 18:19:50,334 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) [2022-04-06 18:19:50,334 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-04-06 18:19:50,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 18:19:50,334 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:50,334 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] [2022-04-06 18:19:50,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 18:19:50,545 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 [2022-04-06 18:19:50,546 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:50,546 INFO L85 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 5 times [2022-04-06 18:19:50,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:50,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1915998307] [2022-04-06 18:19:50,548 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:50,549 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:50,549 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:50,549 INFO L85 PathProgramCache]: Analyzing trace with hash -285848920, now seen corresponding path program 6 times [2022-04-06 18:19:50,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:50,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860398945] [2022-04-06 18:19:50,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:50,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:50,556 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:50,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [139702603] [2022-04-06 18:19:50,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 18:19:50,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:50,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:50,558 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) [2022-04-06 18:19:50,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 18:19:50,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 18:19:50,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:50,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 18:19:50,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 18:19:50,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:50,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:50,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860398945] [2022-04-06 18:19:50,931 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:50,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139702603] [2022-04-06 18:19:50,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139702603] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:50,938 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:50,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-04-06 18:19:50,939 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:50,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1915998307] [2022-04-06 18:19:50,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1915998307] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:50,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:50,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 18:19:50,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329747723] [2022-04-06 18:19:50,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:50,940 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 18:19:50,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:50,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 18:19:50,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-04-06 18:19:50,941 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) [2022-04-06 18:19:51,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:51,052 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2022-04-06 18:19:51,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 18:19:51,052 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 [2022-04-06 18:19:51,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:51,054 INFO L225 Difference]: With dead ends: 45 [2022-04-06 18:19:51,054 INFO L226 Difference]: Without dead ends: 40 [2022-04-06 18:19:51,054 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 [2022-04-06 18:19:51,055 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 2 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2022-04-06 18:19:51,055 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] [2022-04-06 18:19:51,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-04-06 18:19:51,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-04-06 18:19:51,060 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) [2022-04-06 18:19:51,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-04-06 18:19:51,069 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 44 [2022-04-06 18:19:51,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:51,069 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-04-06 18:19:51,071 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) [2022-04-06 18:19:51,071 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-04-06 18:19:51,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 18:19:51,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:51,071 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] [2022-04-06 18:19:51,088 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 18:19:51,287 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 [2022-04-06 18:19:51,287 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:51,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 7 times [2022-04-06 18:19:51,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:51,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [85175617] [2022-04-06 18:19:51,290 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:51,290 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:51,290 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:51,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1858889367, now seen corresponding path program 8 times [2022-04-06 18:19:51,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:51,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810995565] [2022-04-06 18:19:51,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:51,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:51,303 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:51,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054745724] [2022-04-06 18:19:51,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:19:51,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:51,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:51,308 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) [2022-04-06 18:19:51,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 18:19:51,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:19:51,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:51,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 18:19:51,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:51,537 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 18:19:51,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:51,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:51,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810995565] [2022-04-06 18:19:51,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:51,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054745724] [2022-04-06 18:19:51,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054745724] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:51,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:51,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 18:19:51,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:51,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [85175617] [2022-04-06 18:19:51,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [85175617] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:51,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:51,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 18:19:51,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329379815] [2022-04-06 18:19:51,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:51,641 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 18:19:51,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:51,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 18:19:51,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 18:19:51,642 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) [2022-04-06 18:19:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:51,737 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-04-06 18:19:51,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 18:19:51,737 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 [2022-04-06 18:19:51,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:51,738 INFO L225 Difference]: With dead ends: 48 [2022-04-06 18:19:51,738 INFO L226 Difference]: Without dead ends: 43 [2022-04-06 18:19:51,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:19:51,738 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 2 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:19:51,739 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 205 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 18:19:51,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-04-06 18:19:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-04-06 18:19:51,744 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) [2022-04-06 18:19:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2022-04-06 18:19:51,744 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 51 [2022-04-06 18:19:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:51,745 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2022-04-06 18:19:51,745 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) [2022-04-06 18:19:51,745 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2022-04-06 18:19:51,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 18:19:51,745 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:51,745 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] [2022-04-06 18:19:51,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 18:19:51,959 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 [2022-04-06 18:19:51,959 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:51,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:51,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 9 times [2022-04-06 18:19:51,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:51,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7741356] [2022-04-06 18:19:51,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:51,962 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:51,962 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:51,962 INFO L85 PathProgramCache]: Analyzing trace with hash 1288003464, now seen corresponding path program 10 times [2022-04-06 18:19:51,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:51,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510356669] [2022-04-06 18:19:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:51,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:51,968 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:51,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1721138512] [2022-04-06 18:19:51,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 18:19:51,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:51,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:51,969 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) [2022-04-06 18:19:51,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 18:19:52,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 18:19:52,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:52,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 18:19:52,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 18:19:52,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:52,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:52,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510356669] [2022-04-06 18:19:52,384 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:52,384 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721138512] [2022-04-06 18:19:52,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721138512] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:52,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:52,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 18:19:52,384 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:52,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7741356] [2022-04-06 18:19:52,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7741356] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:52,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:52,385 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 18:19:52,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999485096] [2022-04-06 18:19:52,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:52,385 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 18:19:52,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:52,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 18:19:52,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-04-06 18:19:52,386 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) [2022-04-06 18:19:52,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:52,507 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2022-04-06 18:19:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 18:19:52,507 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 [2022-04-06 18:19:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:52,508 INFO L225 Difference]: With dead ends: 51 [2022-04-06 18:19:52,508 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 18:19:52,509 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 [2022-04-06 18:19:52,509 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 [2022-04-06 18:19:52,509 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] [2022-04-06 18:19:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 18:19:52,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-04-06 18:19:52,515 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) [2022-04-06 18:19:52,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2022-04-06 18:19:52,515 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 58 [2022-04-06 18:19:52,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:52,515 INFO L478 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2022-04-06 18:19:52,516 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) [2022-04-06 18:19:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2022-04-06 18:19:52,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-04-06 18:19:52,516 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:52,516 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] [2022-04-06 18:19:52,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 18:19:52,720 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 [2022-04-06 18:19:52,721 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:52,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:52,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 11 times [2022-04-06 18:19:52,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:52,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1132515901] [2022-04-06 18:19:52,724 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:52,724 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:52,724 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:52,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1494042761, now seen corresponding path program 12 times [2022-04-06 18:19:52,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:52,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712714764] [2022-04-06 18:19:52,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:52,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:52,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:52,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [824971632] [2022-04-06 18:19:52,730 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 18:19:52,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:52,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:52,731 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) [2022-04-06 18:19:52,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 18:19:52,862 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 18:19:52,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:52,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 18:19:52,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:53,070 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 18:19:53,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:53,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:53,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712714764] [2022-04-06 18:19:53,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:53,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824971632] [2022-04-06 18:19:53,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824971632] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:53,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:53,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 18:19:53,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:53,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1132515901] [2022-04-06 18:19:53,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1132515901] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:53,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:53,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 18:19:53,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939513496] [2022-04-06 18:19:53,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:53,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 18:19:53,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:53,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 18:19:53,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-04-06 18:19:53,183 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) [2022-04-06 18:19:53,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:53,331 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2022-04-06 18:19:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 18:19:53,331 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 [2022-04-06 18:19:53,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:53,332 INFO L225 Difference]: With dead ends: 54 [2022-04-06 18:19:53,332 INFO L226 Difference]: Without dead ends: 49 [2022-04-06 18:19:53,332 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 [2022-04-06 18:19:53,332 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 [2022-04-06 18:19:53,332 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] [2022-04-06 18:19:53,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-04-06 18:19:53,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-04-06 18:19:53,338 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) [2022-04-06 18:19:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2022-04-06 18:19:53,338 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 65 [2022-04-06 18:19:53,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:53,338 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2022-04-06 18:19:53,338 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) [2022-04-06 18:19:53,338 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2022-04-06 18:19:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-04-06 18:19:53,339 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:53,339 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] [2022-04-06 18:19:53,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 18:19:53,544 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 [2022-04-06 18:19:53,545 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:53,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:53,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1734448024, now seen corresponding path program 13 times [2022-04-06 18:19:53,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:53,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1669782279] [2022-04-06 18:19:53,547 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:53,548 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:53,548 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:53,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1734448024, now seen corresponding path program 14 times [2022-04-06 18:19:53,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:53,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029936175] [2022-04-06 18:19:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:53,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:53,561 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:53,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1735258980] [2022-04-06 18:19:53,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:19:53,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:53,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:53,562 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) [2022-04-06 18:19:53,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 18:19:53,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:19:53,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:53,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 18:19:53,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:53,964 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 18:19:53,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:54,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:54,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029936175] [2022-04-06 18:19:54,108 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:54,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735258980] [2022-04-06 18:19:54,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735258980] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:54,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:54,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 18:19:54,108 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:54,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1669782279] [2022-04-06 18:19:54,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1669782279] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:54,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:54,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 18:19:54,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981915353] [2022-04-06 18:19:54,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:54,109 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 18:19:54,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:54,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 18:19:54,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-04-06 18:19:54,109 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) [2022-04-06 18:19:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:54,266 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2022-04-06 18:19:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 18:19:54,267 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 [2022-04-06 18:19:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:54,267 INFO L225 Difference]: With dead ends: 57 [2022-04-06 18:19:54,267 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 18:19:54,268 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-04-06 18:19:54,268 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 [2022-04-06 18:19:54,268 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] [2022-04-06 18:19:54,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 18:19:54,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 18:19:54,274 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) [2022-04-06 18:19:54,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2022-04-06 18:19:54,274 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 72 [2022-04-06 18:19:54,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:54,274 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2022-04-06 18:19:54,274 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) [2022-04-06 18:19:54,274 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2022-04-06 18:19:54,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 18:19:54,275 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:54,275 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] [2022-04-06 18:19:54,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 18:19:54,475 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 [2022-04-06 18:19:54,476 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:54,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:54,476 INFO L85 PathProgramCache]: Analyzing trace with hash 708181929, now seen corresponding path program 15 times [2022-04-06 18:19:54,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:54,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [970022059] [2022-04-06 18:19:54,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:54,478 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:54,478 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:54,479 INFO L85 PathProgramCache]: Analyzing trace with hash 708181929, now seen corresponding path program 16 times [2022-04-06 18:19:54,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:54,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831933725] [2022-04-06 18:19:54,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:54,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:54,484 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:54,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2132683332] [2022-04-06 18:19:54,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 18:19:54,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:54,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:54,487 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) [2022-04-06 18:19:54,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 18:19:54,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 18:19:54,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:54,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 40 conjunts are in the unsatisfiable core [2022-04-06 18:19:54,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:55,147 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 18:19:55,147 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:55,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:55,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831933725] [2022-04-06 18:19:55,275 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:55,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132683332] [2022-04-06 18:19:55,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132683332] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:55,275 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:55,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 18:19:55,275 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:55,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [970022059] [2022-04-06 18:19:55,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [970022059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:55,275 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:55,275 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 18:19:55,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341827783] [2022-04-06 18:19:55,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:55,276 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 18:19:55,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:55,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 18:19:55,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-04-06 18:19:55,276 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) [2022-04-06 18:19:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:55,477 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2022-04-06 18:19:55,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 18:19:55,478 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 [2022-04-06 18:19:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:55,478 INFO L225 Difference]: With dead ends: 60 [2022-04-06 18:19:55,478 INFO L226 Difference]: Without dead ends: 55 [2022-04-06 18:19:55,479 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 [2022-04-06 18:19:55,479 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 [2022-04-06 18:19:55,479 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] [2022-04-06 18:19:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-04-06 18:19:55,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-04-06 18:19:55,485 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) [2022-04-06 18:19:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2022-04-06 18:19:55,485 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 79 [2022-04-06 18:19:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:55,486 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2022-04-06 18:19:55,486 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) [2022-04-06 18:19:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2022-04-06 18:19:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 18:19:55,486 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:55,487 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] [2022-04-06 18:19:55,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 18:19:55,691 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 [2022-04-06 18:19:55,691 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:55,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:55,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1649446584, now seen corresponding path program 17 times [2022-04-06 18:19:55,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:55,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [786873063] [2022-04-06 18:19:55,694 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:55,694 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:55,694 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:55,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1649446584, now seen corresponding path program 18 times [2022-04-06 18:19:55,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:55,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382317550] [2022-04-06 18:19:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:55,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:55,699 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:55,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1692480727] [2022-04-06 18:19:55,700 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 18:19:55,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:55,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:55,701 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) [2022-04-06 18:19:55,702 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 18:19:55,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-04-06 18:19:55,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:55,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 18:19:55,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-04-06 18:19:56,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:56,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:56,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382317550] [2022-04-06 18:19:56,716 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692480727] [2022-04-06 18:19:56,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692480727] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:56,717 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:56,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-06 18:19:56,717 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:56,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [786873063] [2022-04-06 18:19:56,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [786873063] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:56,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:56,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 18:19:56,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262548571] [2022-04-06 18:19:56,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:56,718 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 18:19:56,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:56,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 18:19:56,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-04-06 18:19:56,718 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) [2022-04-06 18:19:56,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:56,985 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2022-04-06 18:19:56,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 18:19:56,985 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 [2022-04-06 18:19:56,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:56,986 INFO L225 Difference]: With dead ends: 63 [2022-04-06 18:19:56,986 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 18:19:56,986 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2022-04-06 18:19:56,986 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 2 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 18:19:56,987 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 389 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 18:19:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 18:19:56,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2022-04-06 18:19:56,992 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) [2022-04-06 18:19:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2022-04-06 18:19:56,993 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 86 [2022-04-06 18:19:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:56,993 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2022-04-06 18:19:56,993 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) [2022-04-06 18:19:56,993 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2022-04-06 18:19:56,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-04-06 18:19:56,994 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:56,994 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] [2022-04-06 18:19:56,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 18:19:57,199 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 [2022-04-06 18:19:57,199 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:57,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash -373309751, now seen corresponding path program 19 times [2022-04-06 18:19:57,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:57,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1590555558] [2022-04-06 18:19:57,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:57,202 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:57,202 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:57,202 INFO L85 PathProgramCache]: Analyzing trace with hash -373309751, now seen corresponding path program 20 times [2022-04-06 18:19:57,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:57,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506146190] [2022-04-06 18:19:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:57,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:57,219 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:57,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2045982617] [2022-04-06 18:19:57,220 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:19:57,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:57,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:57,221 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) [2022-04-06 18:19:57,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 18:19:57,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:19:57,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:19:57,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 18:19:57,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:19:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 18:19:58,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:19:58,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:19:58,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506146190] [2022-04-06 18:19:58,392 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:19:58,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045982617] [2022-04-06 18:19:58,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045982617] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:19:58,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:19:58,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 18:19:58,392 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:19:58,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1590555558] [2022-04-06 18:19:58,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1590555558] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:19:58,393 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:19:58,393 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 18:19:58,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968102559] [2022-04-06 18:19:58,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:19:58,393 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 18:19:58,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:58,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 18:19:58,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-04-06 18:19:58,394 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) [2022-04-06 18:19:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:19:58,694 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2022-04-06 18:19:58,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 18:19:58,695 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 [2022-04-06 18:19:58,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:19:58,695 INFO L225 Difference]: With dead ends: 66 [2022-04-06 18:19:58,695 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 18:19:58,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 87 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-04-06 18:19:58,696 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, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:19:58,696 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 439 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:19:58,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 18:19:58,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-04-06 18:19:58,702 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) [2022-04-06 18:19:58,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2022-04-06 18:19:58,703 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 93 [2022-04-06 18:19:58,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:19:58,703 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2022-04-06 18:19:58,703 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) [2022-04-06 18:19:58,703 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2022-04-06 18:19:58,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 18:19:58,704 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:19:58,704 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] [2022-04-06 18:19:58,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 18:19:58,909 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 [2022-04-06 18:19:58,909 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:19:58,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:19:58,910 INFO L85 PathProgramCache]: Analyzing trace with hash -22647256, now seen corresponding path program 21 times [2022-04-06 18:19:58,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:19:58,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2063454943] [2022-04-06 18:19:58,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:19:58,912 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:19:58,912 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:19:58,912 INFO L85 PathProgramCache]: Analyzing trace with hash -22647256, now seen corresponding path program 22 times [2022-04-06 18:19:58,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:19:58,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143265739] [2022-04-06 18:19:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:19:58,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:19:58,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:19:58,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855911770] [2022-04-06 18:19:58,919 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 18:19:58,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:19:58,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:19:58,919 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) [2022-04-06 18:19:58,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 18:20:00,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 18:20:00,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:00,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 18:20:00,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:00,344 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 24 proven. 198 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 18:20:00,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:20:00,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:00,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143265739] [2022-04-06 18:20:00,480 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:00,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855911770] [2022-04-06 18:20:00,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855911770] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:20:00,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:20:00,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 18:20:00,481 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:00,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2063454943] [2022-04-06 18:20:00,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2063454943] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:00,481 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:00,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 18:20:00,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337054747] [2022-04-06 18:20:00,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:00,482 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 18:20:00,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 18:20:00,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-04-06 18:20:00,482 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-04-06 18:20:00,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:00,782 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-04-06 18:20:00,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 18:20:00,782 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) Word has length 100 [2022-04-06 18:20:00,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:00,783 INFO L225 Difference]: With dead ends: 69 [2022-04-06 18:20:00,783 INFO L226 Difference]: Without dead ends: 64 [2022-04-06 18:20:00,783 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-04-06 18:20:00,784 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 2 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:00,784 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 485 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:20:00,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-04-06 18:20:00,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-04-06 18:20:00,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 17 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 18:20:00,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 75 transitions. [2022-04-06 18:20:00,790 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 75 transitions. Word has length 100 [2022-04-06 18:20:00,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:00,791 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 75 transitions. [2022-04-06 18:20:00,791 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.3125) internal successors, (37), 16 states have internal predecessors, (37), 14 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 13 states have call predecessors, (14), 13 states have call successors, (14) [2022-04-06 18:20:00,791 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 75 transitions. [2022-04-06 18:20:00,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 18:20:00,791 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:20:00,791 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:20:00,796 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 18:20:00,996 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 [2022-04-06 18:20:00,996 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:20:00,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:20:00,997 INFO L85 PathProgramCache]: Analyzing trace with hash 893158889, now seen corresponding path program 23 times [2022-04-06 18:20:00,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:00,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2089041621] [2022-04-06 18:20:00,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:20:00,999 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:20:00,999 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:20:00,999 INFO L85 PathProgramCache]: Analyzing trace with hash 893158889, now seen corresponding path program 24 times [2022-04-06 18:20:00,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:20:00,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390150407] [2022-04-06 18:20:00,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:20:00,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:20:01,006 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:20:01,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1245286963] [2022-04-06 18:20:01,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 18:20:01,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:01,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:20:01,007 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:20:01,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 18:20:01,216 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2022-04-06 18:20:01,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:01,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 18:20:01,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:01,617 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 26 proven. 234 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 18:20:01,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:20:02,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:02,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390150407] [2022-04-06 18:20:02,095 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:02,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245286963] [2022-04-06 18:20:02,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245286963] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:20:02,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:20:02,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 18:20:02,096 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:02,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2089041621] [2022-04-06 18:20:02,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2089041621] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:02,096 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:02,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 18:20:02,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608876715] [2022-04-06 18:20:02,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:02,096 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 18:20:02,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:02,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 18:20:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2022-04-06 18:20:02,097 INFO L87 Difference]: Start difference. First operand 64 states and 75 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-06 18:20:02,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:02,450 INFO L93 Difference]: Finished difference Result 72 states and 84 transitions. [2022-04-06 18:20:02,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 18:20:02,450 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) Word has length 107 [2022-04-06 18:20:02,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:02,451 INFO L225 Difference]: With dead ends: 72 [2022-04-06 18:20:02,451 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 18:20:02,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2022-04-06 18:20:02,451 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 2 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:02,452 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 527 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:20:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 18:20:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-04-06 18:20:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 18 states have call successors, (18), 6 states have call predecessors, (18), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 18:20:02,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2022-04-06 18:20:02,459 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 107 [2022-04-06 18:20:02,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:02,459 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2022-04-06 18:20:02,459 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 15 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 14 states have call predecessors, (15), 14 states have call successors, (15) [2022-04-06 18:20:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2022-04-06 18:20:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-04-06 18:20:02,460 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:20:02,460 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:20:02,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 18:20:02,665 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:02,666 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:20:02,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:20:02,666 INFO L85 PathProgramCache]: Analyzing trace with hash 363946760, now seen corresponding path program 25 times [2022-04-06 18:20:02,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:02,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1730809942] [2022-04-06 18:20:02,673 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:20:02,673 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:20:02,673 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:20:02,673 INFO L85 PathProgramCache]: Analyzing trace with hash 363946760, now seen corresponding path program 26 times [2022-04-06 18:20:02,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:20:02,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942197360] [2022-04-06 18:20:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:20:02,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:20:02,679 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:20:02,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684454206] [2022-04-06 18:20:02,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:20:02,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:02,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:20:02,680 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:20:02,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 18:20:03,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:20:03,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:03,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 60 conjunts are in the unsatisfiable core [2022-04-06 18:20:03,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 28 proven. 273 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2022-04-06 18:20:03,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:20:03,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942197360] [2022-04-06 18:20:03,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684454206] [2022-04-06 18:20:03,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684454206] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:20:03,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:20:03,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-04-06 18:20:03,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:03,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1730809942] [2022-04-06 18:20:03,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1730809942] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:03,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:03,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 18:20:03,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960438807] [2022-04-06 18:20:03,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:03,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 18:20:03,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 18:20:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2022-04-06 18:20:03,966 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-04-06 18:20:04,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:04,353 INFO L93 Difference]: Finished difference Result 75 states and 88 transitions. [2022-04-06 18:20:04,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 18:20:04,354 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 114 [2022-04-06 18:20:04,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:04,355 INFO L225 Difference]: With dead ends: 75 [2022-04-06 18:20:04,355 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 18:20:04,355 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-04-06 18:20:04,355 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 2 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:04,356 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 583 Invalid, 759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 18:20:04,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 18:20:04,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 18:20:04,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 18:20:04,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2022-04-06 18:20:04,363 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 114 [2022-04-06 18:20:04,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:04,363 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2022-04-06 18:20:04,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 16 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-04-06 18:20:04,364 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2022-04-06 18:20:04,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 18:20:04,364 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:20:04,364 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:20:04,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 18:20:04,565 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 18:20:04,565 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:20:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:20:04,565 INFO L85 PathProgramCache]: Analyzing trace with hash -2101455607, now seen corresponding path program 27 times [2022-04-06 18:20:04,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:04,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [417071785] [2022-04-06 18:20:04,567 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:20:04,567 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:20:04,567 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:20:04,567 INFO L85 PathProgramCache]: Analyzing trace with hash -2101455607, now seen corresponding path program 28 times [2022-04-06 18:20:04,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:20:04,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795637643] [2022-04-06 18:20:04,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:20:04,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:20:04,575 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:20:04,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [171447051] [2022-04-06 18:20:04,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 18:20:04,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:04,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:20:04,576 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:20:04,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 18:20:05,498 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 18:20:05,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:05,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 64 conjunts are in the unsatisfiable core [2022-04-06 18:20:05,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:05,871 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 30 proven. 315 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 18:20:05,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:20:06,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:06,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795637643] [2022-04-06 18:20:06,023 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:06,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171447051] [2022-04-06 18:20:06,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171447051] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:20:06,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:20:06,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2022-04-06 18:20:06,023 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:06,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [417071785] [2022-04-06 18:20:06,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [417071785] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:06,023 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:06,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 18:20:06,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681913387] [2022-04-06 18:20:06,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:06,024 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 18:20:06,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:06,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 18:20:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-04-06 18:20:06,024 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-04-06 18:20:06,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:06,482 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2022-04-06 18:20:06,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 18:20:06,482 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 121 [2022-04-06 18:20:06,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:06,483 INFO L225 Difference]: With dead ends: 78 [2022-04-06 18:20:06,483 INFO L226 Difference]: Without dead ends: 73 [2022-04-06 18:20:06,484 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-04-06 18:20:06,484 INFO L913 BasicCegarLoop]: 64 mSDtfsCounter, 2 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:06,484 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 635 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:20:06,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-04-06 18:20:06,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-04-06 18:20:06,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 20 states have call successors, (20), 6 states have call predecessors, (20), 4 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-04-06 18:20:06,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2022-04-06 18:20:06,491 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 121 [2022-04-06 18:20:06,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:06,492 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2022-04-06 18:20:06,492 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 17 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-04-06 18:20:06,492 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2022-04-06 18:20:06,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 18:20:06,492 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:20:06,492 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:20:06,499 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 18:20:06,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 18:20:06,693 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:20:06,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:20:06,693 INFO L85 PathProgramCache]: Analyzing trace with hash -729919512, now seen corresponding path program 29 times [2022-04-06 18:20:06,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:06,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [815134204] [2022-04-06 18:20:06,695 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:20:06,695 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:20:06,695 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:20:06,695 INFO L85 PathProgramCache]: Analyzing trace with hash -729919512, now seen corresponding path program 30 times [2022-04-06 18:20:06,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:20:06,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730906731] [2022-04-06 18:20:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:20:06,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:20:06,701 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:20:06,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [976143129] [2022-04-06 18:20:06,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 18:20:06,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:06,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:20:06,702 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:20:06,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 18:20:07,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-04-06 18:20:07,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:07,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 18:20:07,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 32 proven. 360 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 18:20:07,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:20:07,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:07,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730906731] [2022-04-06 18:20:07,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:07,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976143129] [2022-04-06 18:20:07,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976143129] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:20:07,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:20:07,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-06 18:20:07,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:07,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [815134204] [2022-04-06 18:20:07,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [815134204] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:07,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:07,570 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 18:20:07,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592102185] [2022-04-06 18:20:07,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:07,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 18:20:07,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:07,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 18:20:07,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2022-04-06 18:20:07,571 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-04-06 18:20:08,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:08,058 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2022-04-06 18:20:08,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 18:20:08,059 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 128 [2022-04-06 18:20:08,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:08,059 INFO L225 Difference]: With dead ends: 81 [2022-04-06 18:20:08,059 INFO L226 Difference]: Without dead ends: 76 [2022-04-06 18:20:08,060 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-04-06 18:20:08,060 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 2 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 961 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:08,060 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 689 Invalid, 961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 961 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 18:20:08,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-04-06 18:20:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-04-06 18:20:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 21 states have call successors, (21), 6 states have call predecessors, (21), 4 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 18:20:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2022-04-06 18:20:08,067 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 128 [2022-04-06 18:20:08,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:08,068 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2022-04-06 18:20:08,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 20 states have internal predecessors, (45), 18 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-04-06 18:20:08,068 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2022-04-06 18:20:08,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 18:20:08,068 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:20:08,068 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:20:08,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 18:20:08,273 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 18:20:08,274 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:20:08,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:20:08,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1087843369, now seen corresponding path program 31 times [2022-04-06 18:20:08,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:08,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1279427503] [2022-04-06 18:20:08,276 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:20:08,276 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:20:08,276 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:20:08,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1087843369, now seen corresponding path program 32 times [2022-04-06 18:20:08,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:20:08,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846001960] [2022-04-06 18:20:08,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:20:08,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:20:08,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:20:08,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300893815] [2022-04-06 18:20:08,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:20:08,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:08,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:20:08,290 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:20:08,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 18:20:08,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:20:08,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:08,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 18:20:08,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:09,426 INFO L134 CoverageAnalysis]: Checked inductivity of 986 backedges. 34 proven. 408 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 18:20:09,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:20:10,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:10,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846001960] [2022-04-06 18:20:10,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:10,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300893815] [2022-04-06 18:20:10,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300893815] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:20:10,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:20:10,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-04-06 18:20:10,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:10,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1279427503] [2022-04-06 18:20:10,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1279427503] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:10,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:10,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 18:20:10,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667368761] [2022-04-06 18:20:10,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:10,534 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 18:20:10,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:10,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 18:20:10,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=340, Invalid=1220, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 18:20:10,535 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-04-06 18:20:11,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:11,107 INFO L93 Difference]: Finished difference Result 84 states and 100 transitions. [2022-04-06 18:20:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 18:20:11,108 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) Word has length 135 [2022-04-06 18:20:11,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:11,109 INFO L225 Difference]: With dead ends: 84 [2022-04-06 18:20:11,109 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 18:20:11,109 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=350, Invalid=1372, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 18:20:11,109 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 2 mSDsluCounter, 660 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1086 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:11,110 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 730 Invalid, 1086 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:20:11,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 18:20:11,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-04-06 18:20:11,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 22 states have call successors, (22), 6 states have call predecessors, (22), 4 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 18:20:11,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 95 transitions. [2022-04-06 18:20:11,117 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 95 transitions. Word has length 135 [2022-04-06 18:20:11,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:11,118 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 95 transitions. [2022-04-06 18:20:11,118 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 19 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 18 states have call predecessors, (19), 18 states have call successors, (19) [2022-04-06 18:20:11,118 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 95 transitions. [2022-04-06 18:20:11,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-04-06 18:20:11,119 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:20:11,119 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:20:11,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2022-04-06 18:20:11,323 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:11,324 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:20:11,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:20:11,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1539623736, now seen corresponding path program 33 times [2022-04-06 18:20:11,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:11,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [366484340] [2022-04-06 18:20:11,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:20:11,326 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:20:11,326 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:20:11,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1539623736, now seen corresponding path program 34 times [2022-04-06 18:20:11,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:20:11,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510706136] [2022-04-06 18:20:11,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:20:11,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:20:11,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:20:11,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [253758082] [2022-04-06 18:20:11,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 18:20:11,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:11,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:20:11,333 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:20:11,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 18:20:11,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 18:20:11,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:11,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 18:20:11,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:12,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 36 proven. 459 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 18:20:12,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:20:12,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510706136] [2022-04-06 18:20:12,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:12,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253758082] [2022-04-06 18:20:12,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253758082] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:20:12,483 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:20:12,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-06 18:20:12,483 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:12,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [366484340] [2022-04-06 18:20:12,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [366484340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:12,483 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:12,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 18:20:12,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878861257] [2022-04-06 18:20:12,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:12,483 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 18:20:12,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:12,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 18:20:12,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-04-06 18:20:12,484 INFO L87 Difference]: Start difference. First operand 79 states and 95 transitions. Second operand has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-04-06 18:20:13,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:13,051 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2022-04-06 18:20:13,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 18:20:13,051 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) Word has length 142 [2022-04-06 18:20:13,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:13,052 INFO L225 Difference]: With dead ends: 87 [2022-04-06 18:20:13,052 INFO L226 Difference]: Without dead ends: 82 [2022-04-06 18:20:13,053 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-04-06 18:20:13,053 INFO L913 BasicCegarLoop]: 73 mSDtfsCounter, 2 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 803 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:13,053 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 803 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:20:13,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-04-06 18:20:13,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-04-06 18:20:13,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 23 states have call successors, (23), 6 states have call predecessors, (23), 4 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 18:20:13,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2022-04-06 18:20:13,061 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 142 [2022-04-06 18:20:13,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:13,061 INFO L478 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2022-04-06 18:20:13,061 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 20 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 19 states have call predecessors, (20), 19 states have call successors, (20) [2022-04-06 18:20:13,061 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2022-04-06 18:20:13,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-04-06 18:20:13,062 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:20:13,062 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:20:13,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 18:20:13,263 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:13,263 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:20:13,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:20:13,263 INFO L85 PathProgramCache]: Analyzing trace with hash -157742263, now seen corresponding path program 35 times [2022-04-06 18:20:13,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:13,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1529352623] [2022-04-06 18:20:13,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:20:13,265 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:20:13,265 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:20:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash -157742263, now seen corresponding path program 36 times [2022-04-06 18:20:13,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:20:13,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088199524] [2022-04-06 18:20:13,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:20:13,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:20:13,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:20:13,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116336817] [2022-04-06 18:20:13,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 18:20:13,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:13,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:20:13,273 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:20:13,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 18:20:24,059 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-04-06 18:20:24,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:24,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 18:20:24,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:24,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 38 proven. 513 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2022-04-06 18:20:24,531 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:20:24,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:24,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088199524] [2022-04-06 18:20:24,684 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:24,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116336817] [2022-04-06 18:20:24,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116336817] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:20:24,684 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:20:24,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2022-04-06 18:20:24,685 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:24,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1529352623] [2022-04-06 18:20:24,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1529352623] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:24,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:24,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 18:20:24,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854996934] [2022-04-06 18:20:24,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:24,685 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 18:20:24,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:24,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 18:20:24,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-04-06 18:20:24,686 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-06 18:20:25,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:25,276 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-04-06 18:20:25,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 18:20:25,277 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) Word has length 149 [2022-04-06 18:20:25,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:25,278 INFO L225 Difference]: With dead ends: 90 [2022-04-06 18:20:25,278 INFO L226 Difference]: Without dead ends: 85 [2022-04-06 18:20:25,278 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 135 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=727, Unknown=0, NotChecked=0, Total=812 [2022-04-06 18:20:25,278 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 2 mSDsluCounter, 787 mSDsCounter, 0 mSdLazyCounter, 1309 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 1309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:25,278 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 863 Invalid, 1309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1309 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 18:20:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-04-06 18:20:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-04-06 18:20:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 24 states have call successors, (24), 6 states have call predecessors, (24), 4 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-04-06 18:20:25,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-04-06 18:20:25,291 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 149 [2022-04-06 18:20:25,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:25,291 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-04-06 18:20:25,291 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 21 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 20 states have call predecessors, (21), 20 states have call successors, (21) [2022-04-06 18:20:25,291 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-04-06 18:20:25,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-04-06 18:20:25,292 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:20:25,292 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:20:25,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2022-04-06 18:20:25,493 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 18:20:25,493 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:20:25,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:20:25,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1167462824, now seen corresponding path program 37 times [2022-04-06 18:20:25,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:25,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [220885726] [2022-04-06 18:20:25,495 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:20:25,495 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:20:25,495 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:20:25,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1167462824, now seen corresponding path program 38 times [2022-04-06 18:20:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:20:25,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316782748] [2022-04-06 18:20:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:20:25,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:20:25,502 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:20:25,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442648607] [2022-04-06 18:20:25,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 18:20:25,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:25,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:20:25,503 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:20:25,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 18:20:25,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 18:20:25,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:26,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 85 conjunts are in the unsatisfiable core [2022-04-06 18:20:26,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:26,606 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 40 proven. 570 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 18:20:26,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:20:27,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:27,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316782748] [2022-04-06 18:20:27,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:27,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442648607] [2022-04-06 18:20:27,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442648607] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:20:27,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:20:27,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2022-04-06 18:20:27,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:27,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [220885726] [2022-04-06 18:20:27,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [220885726] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:27,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:27,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 18:20:27,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621606918] [2022-04-06 18:20:27,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:27,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 18:20:27,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:27,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 18:20:27,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=457, Invalid=1613, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 18:20:27,918 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-04-06 18:20:28,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:28,620 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2022-04-06 18:20:28,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 18:20:28,622 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) Word has length 156 [2022-04-06 18:20:28,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:28,623 INFO L225 Difference]: With dead ends: 93 [2022-04-06 18:20:28,623 INFO L226 Difference]: Without dead ends: 88 [2022-04-06 18:20:28,624 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=467, Invalid=1789, Unknown=0, NotChecked=0, Total=2256 [2022-04-06 18:20:28,624 INFO L913 BasicCegarLoop]: 79 mSDtfsCounter, 2 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 1455 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:28,624 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 907 Invalid, 1455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1455 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:20:28,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-04-06 18:20:28,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-04-06 18:20:28,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 25 states have call successors, (25), 6 states have call predecessors, (25), 4 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 18:20:28,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2022-04-06 18:20:28,633 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 156 [2022-04-06 18:20:28,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:28,633 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2022-04-06 18:20:28,634 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 22 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 21 states have call predecessors, (22), 21 states have call successors, (22) [2022-04-06 18:20:28,634 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2022-04-06 18:20:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-04-06 18:20:28,634 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:20:28,634 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:20:28,639 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-04-06 18:20:28,839 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 18:20:28,839 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:20:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:20:28,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1670771305, now seen corresponding path program 39 times [2022-04-06 18:20:28,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:28,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1936247849] [2022-04-06 18:20:28,842 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:20:28,842 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:20:28,842 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:20:28,842 INFO L85 PathProgramCache]: Analyzing trace with hash 1670771305, now seen corresponding path program 40 times [2022-04-06 18:20:28,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:20:28,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455295442] [2022-04-06 18:20:28,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:20:28,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:20:28,848 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:20:28,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1968405181] [2022-04-06 18:20:28,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 18:20:28,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:28,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:20:28,849 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:20:28,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 18:20:29,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 18:20:29,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:29,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 88 conjunts are in the unsatisfiable core [2022-04-06 18:20:29,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 42 proven. 630 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 18:20:29,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 18:20:30,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:30,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455295442] [2022-04-06 18:20:30,046 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:30,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968405181] [2022-04-06 18:20:30,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968405181] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 18:20:30,046 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 18:20:30,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2022-04-06 18:20:30,046 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:30,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1936247849] [2022-04-06 18:20:30,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1936247849] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:30,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:30,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 18:20:30,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517758329] [2022-04-06 18:20:30,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:30,047 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 18:20:30,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:30,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 18:20:30,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2022-04-06 18:20:30,048 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-04-06 18:20:30,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:30,736 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2022-04-06 18:20:30,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 18:20:30,737 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) Word has length 163 [2022-04-06 18:20:30,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:30,737 INFO L225 Difference]: With dead ends: 96 [2022-04-06 18:20:30,738 INFO L226 Difference]: Without dead ends: 91 [2022-04-06 18:20:30,738 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2022-04-06 18:20:30,738 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 2 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 1571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 989 SdHoareTripleChecker+Invalid, 1571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:30,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 989 Invalid, 1571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1571 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 18:20:30,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-04-06 18:20:30,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-04-06 18:20:30,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 26 states have call successors, (26), 6 states have call predecessors, (26), 4 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 18:20:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 111 transitions. [2022-04-06 18:20:30,747 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 111 transitions. Word has length 163 [2022-04-06 18:20:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:30,747 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 111 transitions. [2022-04-06 18:20:30,747 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 25 states have internal predecessors, (55), 23 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 22 states have call predecessors, (23), 22 states have call successors, (23) [2022-04-06 18:20:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 111 transitions. [2022-04-06 18:20:30,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-04-06 18:20:30,748 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 18:20:30,748 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 18:20:30,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 18:20:30,951 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:30,951 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 18:20:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 18:20:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1329797496, now seen corresponding path program 41 times [2022-04-06 18:20:30,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:30,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1643786714] [2022-04-06 18:20:30,954 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 18:20:30,954 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-04-06 18:20:30,954 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 18:20:30,954 INFO L85 PathProgramCache]: Analyzing trace with hash -1329797496, now seen corresponding path program 42 times [2022-04-06 18:20:30,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 18:20:30,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210992647] [2022-04-06 18:20:30,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 18:20:30,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 18:20:30,960 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 18:20:30,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963993980] [2022-04-06 18:20:30,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 18:20:30,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:30,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 18:20:30,961 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 18:20:30,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 18:20:31,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2022-04-06 18:20:31,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 18:20:31,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 18:20:31,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 18:20:32,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 819 proven. 0 refuted. 0 times theorem prover too weak. 842 trivial. 0 not checked. [2022-04-06 18:20:32,359 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 18:20:32,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 18:20:32,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210992647] [2022-04-06 18:20:32,360 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 18:20:32,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963993980] [2022-04-06 18:20:32,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963993980] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:32,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:32,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 18:20:32,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 18:20:32,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1643786714] [2022-04-06 18:20:32,360 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1643786714] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 18:20:32,360 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 18:20:32,360 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 18:20:32,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829726478] [2022-04-06 18:20:32,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 18:20:32,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 18:20:32,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 18:20:32,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 18:20:32,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2022-04-06 18:20:32,361 INFO L87 Difference]: Start difference. First operand 91 states and 111 transitions. Second operand has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 23 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2022-04-06 18:20:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 18:20:32,522 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2022-04-06 18:20:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-04-06 18:20:32,522 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 23 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) Word has length 170 [2022-04-06 18:20:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 18:20:32,523 INFO L225 Difference]: With dead ends: 95 [2022-04-06 18:20:32,523 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 18:20:32,523 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=284, Invalid=418, Unknown=0, NotChecked=0, Total=702 [2022-04-06 18:20:32,524 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 4 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 18:20:32,524 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 419 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 18:20:32,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 18:20:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 18:20:32,524 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) [2022-04-06 18:20:32,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 18:20:32,525 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 170 [2022-04-06 18:20:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 18:20:32,525 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 18:20:32,525 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.269230769230769) internal successors, (59), 25 states have internal predecessors, (59), 23 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (24), 24 states have call predecessors, (24), 23 states have call successors, (24) [2022-04-06 18:20:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 18:20:32,525 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 18:20:32,527 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 18:20:32,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 18:20:32,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 18:20:32,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 18:20:34,140 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2022-04-06 18:20:34,140 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2022-04-06 18:20:34,140 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2022-04-06 18:20:34,140 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2022-04-06 18:20:34,140 INFO L878 garLoopResultBuilder]: At program point L7(line 7) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 18:20:34,140 INFO L878 garLoopResultBuilder]: At program point L7-2(lines 6 8) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 18:20:34,140 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 6 8) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 18:20:34,140 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 17 40) the Hoare annotation is: true [2022-04-06 18:20:34,141 INFO L878 garLoopResultBuilder]: At program point L28(line 28) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 20)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (= main_~c~0 16) (= main_~y~0 16) .cse1 (< 15 main_~k~0)) (and (= 7 main_~y~0) (= 7 main_~c~0) .cse0 .cse1 (< 6 main_~k~0)) (and (= main_~y~0 9) .cse0 (= main_~c~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and (< 7 main_~k~0) (= main_~y~0 8) .cse0 (= main_~c~0 8) .cse1) (and (= main_~c~0 17) .cse0 .cse1 (< 16 main_~k~0) (= main_~y~0 17)) (and (= main_~y~0 12) .cse0 (= main_~c~0 12) (< 11 main_~k~0) .cse1) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (< 17 main_~k~0) .cse0 (= main_~c~0 18) .cse1 (= main_~y~0 18)) (and .cse0 (= 5 main_~c~0) (= 5 main_~y~0) .cse1 (< 4 main_~k~0)) (and .cse0 (= main_~y~0 10) (< 9 main_~k~0) (= main_~c~0 10) .cse1) (and .cse0 (< 18 main_~k~0) (= 19 main_~y~0) .cse1 (= 19 main_~c~0)) (and (= main_~c~0 15) .cse0 (= main_~y~0 15) (< 14 main_~k~0) .cse1) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and (<= main_~c~0 20) .cse0 (< 19 main_~k~0) (= main_~y~0 20) (<= 20 main_~c~0) .cse1) (and (= main_~y~0 2) (< 1 main_~k~0) .cse0 (= main_~c~0 2) .cse1) (and (< 12 main_~k~0) .cse0 (= main_~c~0 13) (= main_~y~0 13) .cse1) (and (< 10 main_~k~0) .cse0 (= main_~c~0 11) (= main_~y~0 11) .cse1) (and (= main_~y~0 6) .cse0 (= main_~c~0 6) (< 5 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) .cse1 (< main_~c~0 (+ main_~k~0 1)) (= main_~c~0 3)) (and (= main_~y~0 14) .cse0 (< 13 main_~k~0) (= main_~c~0 14) .cse1))) [2022-04-06 18:20:34,141 INFO L878 garLoopResultBuilder]: At program point L28-1(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 20)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (= main_~c~0 16) (= main_~y~0 16) .cse1 (< 15 main_~k~0)) (and (= 7 main_~y~0) (= 7 main_~c~0) .cse0 .cse1 (< 6 main_~k~0)) (and (= main_~y~0 9) .cse0 (= main_~c~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and (< 7 main_~k~0) (= main_~y~0 8) .cse0 (= main_~c~0 8) .cse1) (and (= main_~c~0 17) .cse0 .cse1 (< 16 main_~k~0) (= main_~y~0 17)) (and (= main_~y~0 12) .cse0 (= main_~c~0 12) (< 11 main_~k~0) .cse1) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (< 17 main_~k~0) .cse0 (= main_~c~0 18) .cse1 (= main_~y~0 18)) (and .cse0 (= 5 main_~c~0) (= 5 main_~y~0) .cse1 (< 4 main_~k~0)) (and .cse0 (= main_~y~0 10) (< 9 main_~k~0) (= main_~c~0 10) .cse1) (and .cse0 (< 18 main_~k~0) (= 19 main_~y~0) .cse1 (= 19 main_~c~0)) (and (= main_~c~0 15) .cse0 (= main_~y~0 15) (< 14 main_~k~0) .cse1) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and (<= main_~c~0 20) .cse0 (< 19 main_~k~0) (= main_~y~0 20) (<= 20 main_~c~0) .cse1) (and (= main_~y~0 2) (< 1 main_~k~0) .cse0 (= main_~c~0 2) .cse1) (and (< 12 main_~k~0) .cse0 (= main_~c~0 13) (= main_~y~0 13) .cse1) (and (< 10 main_~k~0) .cse0 (= main_~c~0 11) (= main_~y~0 11) .cse1) (and (= main_~y~0 6) .cse0 (= main_~c~0 6) (< 5 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) .cse1 (< main_~c~0 (+ main_~k~0 1)) (= main_~c~0 3)) (and (= main_~y~0 14) .cse0 (< 13 main_~k~0) (= main_~c~0 14) .cse1))) [2022-04-06 18:20:34,141 INFO L878 garLoopResultBuilder]: At program point L27-2(lines 27 36) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 20)) (.cse1 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and .cse0 (= main_~c~0 16) (= main_~y~0 16) .cse1 (< 15 main_~k~0)) (and (= 7 main_~y~0) (= 7 main_~c~0) .cse0 .cse1 (< 6 main_~k~0)) (and (= main_~y~0 9) .cse0 (= main_~c~0 9) (< 8 main_~k~0) .cse1) (and .cse0 (= main_~y~0 1) (< 0 main_~k~0) .cse1 (= main_~c~0 1)) (and (< 7 main_~k~0) (= main_~y~0 8) .cse0 (= main_~c~0 8) .cse1) (and (= main_~c~0 17) .cse0 .cse1 (< 16 main_~k~0) (= main_~y~0 17)) (and (= main_~y~0 12) .cse0 (= main_~c~0 12) (< 11 main_~k~0) .cse1) (and .cse0 (= main_~y~0 4) (= main_~c~0 4) (< 3 main_~k~0) .cse1) (and (< 17 main_~k~0) .cse0 (= main_~c~0 18) .cse1 (= main_~y~0 18)) (and .cse0 (= 5 main_~c~0) (= 5 main_~y~0) .cse1 (< 4 main_~k~0)) (and .cse0 (= main_~y~0 10) (< 9 main_~k~0) (= main_~c~0 10) .cse1) (and .cse0 (< 18 main_~k~0) (= 19 main_~y~0) .cse1 (= 19 main_~c~0)) (and (= main_~c~0 15) .cse0 (= main_~y~0 15) (< 14 main_~k~0) .cse1) (and .cse0 (<= 0 main_~k~0) (= main_~c~0 0) (= main_~y~0 0) .cse1) (and (<= main_~c~0 20) .cse0 (< 19 main_~k~0) (= main_~y~0 20) (<= 20 main_~c~0) .cse1) (and (= main_~y~0 2) (< 1 main_~k~0) .cse0 (= main_~c~0 2) .cse1) (and (< 12 main_~k~0) .cse0 (= main_~c~0 13) (= main_~y~0 13) .cse1) (and (< 10 main_~k~0) .cse0 (= main_~c~0 11) (= main_~y~0 11) .cse1) (and (= main_~y~0 6) .cse0 (= main_~c~0 6) (< 5 main_~k~0) .cse1) (and .cse0 (= main_~y~0 3) .cse1 (< main_~c~0 (+ main_~k~0 1)) (= main_~c~0 3)) (and (= main_~y~0 14) .cse0 (< 13 main_~k~0) (= main_~c~0 14) .cse1))) [2022-04-06 18:20:34,141 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 17 40) the Hoare annotation is: true [2022-04-06 18:20:34,141 INFO L878 garLoopResultBuilder]: At program point L27-3(lines 27 36) the Hoare annotation is: (let ((.cse1 (+ (- 1) main_~y~0)) (.cse2 (+ (- 2) main_~y~0)) (.cse0 (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)))) (or (and (= main_~x~0 0) (= main_~y~0 0)) (and (<= main_~k~0 6) (< 5 main_~k~0) .cse0 (<= main_~c~0 6) (= 5 .cse1)) (and (= (+ main_~y~0 (- 6)) 9) (< 14 main_~k~0) (<= main_~c~0 15) (<= main_~k~0 15) .cse0) (and (= 5 (+ main_~y~0 (- 5))) (<= main_~k~0 10) (<= main_~c~0 10) (< 9 main_~k~0) .cse0) (and (= main_~y~0 9) (<= main_~k~0 9) (< 8 main_~k~0) (<= main_~c~0 9) .cse0) (and (<= main_~c~0 20) (<= main_~k~0 20) (< 19 main_~k~0) (= main_~y~0 20) .cse0) (and (<= main_~c~0 17) (<= main_~k~0 17) (= 16 .cse1) .cse0 (< 16 main_~k~0)) (and (<= main_~c~0 3) (= main_~y~0 3) (<= main_~k~0 3) (< 2 main_~k~0) .cse0) (and (< 12 main_~k~0) (<= main_~c~0 13) (<= main_~k~0 13) (= main_~y~0 13) .cse0) (and (= .cse1 0) (<= main_~k~0 1) (< 0 main_~k~0) .cse0 (<= main_~c~0 1)) (and (<= main_~c~0 5) (<= main_~k~0 5) (= 5 main_~y~0) .cse0 (< 4 main_~k~0)) (and (= 3 .cse1) (< 3 main_~k~0) (<= main_~k~0 4) .cse0 (<= main_~c~0 4)) (and (< 1 main_~k~0) (= .cse2 0) (<= main_~k~0 2) (<= main_~c~0 2) .cse0) (and (< 17 main_~k~0) (<= main_~c~0 18) (<= main_~k~0 18) .cse0 (= .cse1 17)) (and (= main_~y~0 14) (< 13 main_~k~0) .cse0 (<= main_~k~0 14) (<= main_~c~0 14)) (and (= main_~y~0 12) (<= main_~c~0 12) (< 11 main_~k~0) .cse0 (<= main_~k~0 12)) (and (< 7 main_~k~0) (<= main_~c~0 8) (= .cse2 6) (<= main_~k~0 8) .cse0) (and (<= main_~k~0 7) (<= main_~c~0 7) (= 7 main_~y~0) .cse0 (< 6 main_~k~0)) (and (<= main_~k~0 16) (= main_~y~0 16) .cse0 (< 15 main_~k~0) (<= main_~c~0 16)) (and (< 18 main_~k~0) (<= main_~c~0 19) (<= main_~k~0 19) (= 19 main_~y~0) .cse0) (and (<= main_~c~0 11) (< 10 main_~k~0) (= main_~y~0 11) (<= main_~k~0 11) .cse0))) [2022-04-06 18:20:34,141 INFO L885 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: true [2022-04-06 18:20:34,141 INFO L878 garLoopResultBuilder]: At program point L21-1(line 21) the Hoare annotation is: (and (<= main_~k~0 20) (<= 0 main_~k~0)) [2022-04-06 18:20:34,141 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 17 40) the Hoare annotation is: true [2022-04-06 18:20:34,141 INFO L885 garLoopResultBuilder]: At program point L38(line 38) the Hoare annotation is: true [2022-04-06 18:20:34,141 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (= (+ (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) (* main_~y~0 main_~y~0) (* (* main_~y~0 main_~y~0 main_~y~0) 2)) (* main_~x~0 4)) [2022-04-06 18:20:34,141 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 18:20:34,142 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 18:20:34,142 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 18:20:34,142 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 18:20:34,142 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 18:20:34,142 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 18:20:34,142 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 18:20:34,142 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2022-04-06 18:20:34,142 INFO L878 garLoopResultBuilder]: At program point L11(lines 11 12) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 18:20:34,142 INFO L878 garLoopResultBuilder]: At program point L10(lines 10 13) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-04-06 18:20:34,142 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 9 15) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-04-06 18:20:34,142 INFO L878 garLoopResultBuilder]: At program point L10-2(lines 9 15) the Hoare annotation is: (or (not (<= 1 |__VERIFIER_assert_#in~cond|)) (<= 1 __VERIFIER_assert_~cond)) [2022-04-06 18:20:34,142 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2022-04-06 18:20:34,144 INFO L719 BasicCegarLoop]: Path program histogram: [42, 2, 2, 2] [2022-04-06 18:20:34,145 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 18:20:34,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 06:20:34 BoogieIcfgContainer [2022-04-06 18:20:34,169 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 18:20:34,169 INFO L158 Benchmark]: Toolchain (without parser) took 49964.12ms. Allocated memory was 182.5MB in the beginning and 252.7MB in the end (delta: 70.3MB). Free memory was 132.9MB in the beginning and 184.2MB in the end (delta: -51.3MB). Peak memory consumption was 123.9MB. Max. memory is 8.0GB. [2022-04-06 18:20:34,169 INFO L158 Benchmark]: CDTParser took 0.09ms. Allocated memory is still 182.5MB. Free memory was 149.8MB in the beginning and 149.8MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 18:20:34,170 INFO L158 Benchmark]: CACSL2BoogieTranslator took 346.05ms. Allocated memory is still 182.5MB. Free memory was 132.5MB in the beginning and 158.6MB in the end (delta: -26.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. [2022-04-06 18:20:34,170 INFO L158 Benchmark]: Boogie Preprocessor took 43.09ms. Allocated memory is still 182.5MB. Free memory was 158.6MB in the beginning and 157.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-04-06 18:20:34,170 INFO L158 Benchmark]: RCFGBuilder took 249.30ms. Allocated memory is still 182.5MB. Free memory was 157.1MB in the beginning and 146.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 18:20:34,170 INFO L158 Benchmark]: TraceAbstraction took 49317.02ms. Allocated memory was 182.5MB in the beginning and 252.7MB in the end (delta: 70.3MB). Free memory was 146.4MB in the beginning and 184.2MB in the end (delta: -37.8MB). Peak memory consumption was 137.0MB. Max. memory is 8.0GB. [2022-04-06 18:20:34,171 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09ms. Allocated memory is still 182.5MB. Free memory was 149.8MB in the beginning and 149.8MB in the end (delta: 73.1kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 346.05ms. Allocated memory is still 182.5MB. Free memory was 132.5MB in the beginning and 158.6MB in the end (delta: -26.0MB). Peak memory consumption was 12.6MB. Max. memory is 8.0GB. * Boogie Preprocessor took 43.09ms. Allocated memory is still 182.5MB. Free memory was 158.6MB in the beginning and 157.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 249.30ms. Allocated memory is still 182.5MB. Free memory was 157.1MB in the beginning and 146.9MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 49317.02ms. Allocated memory was 182.5MB in the beginning and 252.7MB in the end (delta: 70.3MB). Free memory was 146.4MB in the beginning and 184.2MB in the end (delta: -37.8MB). Peak memory consumption was 137.0MB. 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 6 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 49.2s, OverallIterations: 24, TraceHistogramMax: 23, PathProgramHistogramMax: 42, EmptinessCheckTime: 0.1s, AutomataDifference: 7.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.4s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 78 SdHoareTripleChecker+Valid, 6.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 71 mSDsluCounter, 10450 SdHoareTripleChecker+Invalid, 5.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 9235 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 13133 IncrementalHoareTripleChecker+Invalid, 13164 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 1215 mSDtfsCounter, 13133 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2767 GetRequests, 2274 SyntacticMatches, 22 SemanticMatches, 471 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=91occurred in iteration=23, InterpolantAutomatonStates: 369, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 24 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 28 LocationsWithAnnotation, 316 PreInvPairs, 504 NumberOfFragments, 2797 HoareAnnotationTreeSize, 316 FomulaSimplifications, 2055 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 28 FomulaSimplificationsInter, 38 FormulaSimplificationTreeSizeReductionInter, 1.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((k <= 20 && c == 16) && y == 16) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 15 < k) || ((((7 == y && 7 == c) && k <= 20) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 6 < k)) || ((((y == 9 && k <= 20) && c == 9) && 8 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && y == 1) && 0 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && c == 1)) || ((((7 < k && y == 8) && k <= 20) && c == 8) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((c == 17 && k <= 20) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 16 < k) && y == 17)) || ((((y == 12 && k <= 20) && c == 12) && 11 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && y == 4) && c == 4) && 3 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((17 < k && k <= 20) && c == 18) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && y == 18)) || ((((k <= 20 && 5 == c) && 5 == y) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 4 < k)) || ((((k <= 20 && y == 10) && 9 < k) && c == 10) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && 18 < k) && 19 == y) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && 19 == c)) || ((((c == 15 && k <= 20) && y == 15) && 14 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && 0 <= k) && c == 0) && y == 0) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || (((((c <= 20 && k <= 20) && 19 < k) && y == 20) && 20 <= c) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((y == 2 && 1 < k) && k <= 20) && c == 2) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((12 < k && k <= 20) && c == 13) && y == 13) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((10 < k && k <= 20) && c == 11) && y == 11) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((y == 6 && k <= 20) && c == 6) && 5 < k) && y * y * y * y + y * y + y * y * y * 2 == x * 4)) || ((((k <= 20 && y == 3) && y * y * y * y + y * y + y * y * y * 2 == x * 4) && c < k + 1) && c == 3)) || ((((y == 14 && k <= 20) && 13 < k) && c == 14) && y * y * y * y + y * y + y * y * y * 2 == x * 4) - ProcedureContractResult [Line: 6]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 17]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 9]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: !(1 <= \old(cond)) || 1 <= cond RESULT: Ultimate proved your program to be correct! [2022-04-06 18:20:34,195 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...