/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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:40:41,773 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:40:41,775 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:40:41,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 00:40:41,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 00:40:41,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 00:40:41,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 00:40:41,853 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 00:40:41,875 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:40:41,875 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:40:41,876 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:40:41,876 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:40:41,876 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:40:41,876 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:40:41,877 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:40:41,877 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:40:41,877 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:40:41,878 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:40:41,878 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:40:41,878 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:40:41,878 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:40:41,878 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:40:41,878 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:40:41,878 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:40:41,878 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:40:41,879 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:40:41,879 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:40:41,879 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:40:41,879 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:40:41,879 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:40:41,880 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:40:41,880 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:40:41,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:40:41,880 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:40:41,880 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:40:41,880 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:40:41,880 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:40:41,880 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:40:41,880 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:40:41,880 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:40:41,881 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:40:41,881 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:40:42,047 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:40:42,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:40:42,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:40:42,080 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:40:42,081 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:40:42,082 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-03-20 00:40:42,126 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f824a09/d6c2779ed824427491e5bb05485ae058/FLAG6a00b0189 [2022-03-20 00:40:42,485 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:40:42,485 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound100.c [2022-03-20 00:40:42,491 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f824a09/d6c2779ed824427491e5bb05485ae058/FLAG6a00b0189 [2022-03-20 00:40:42,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a4f824a09/d6c2779ed824427491e5bb05485ae058 [2022-03-20 00:40:42,506 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:40:42,508 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:40:42,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:40:42,511 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:40:42,513 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:40:42,514 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:40:42" (1/1) ... [2022-03-20 00:40:42,514 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3604c6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42, skipping insertion in model container [2022-03-20 00:40:42,515 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:40:42" (1/1) ... [2022-03-20 00:40:42,519 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:40:42,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:40:42,669 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/egcd2-ll_valuebound100.c[490,503] [2022-03-20 00:40:42,703 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:40:42,709 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:40:42,723 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/egcd2-ll_valuebound100.c[490,503] [2022-03-20 00:40:42,728 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:40:42,737 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:40:42,737 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42 WrapperNode [2022-03-20 00:40:42,738 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:40:42,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:40:42,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:40:42,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:40:42,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42" (1/1) ... [2022-03-20 00:40:42,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42" (1/1) ... [2022-03-20 00:40:42,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42" (1/1) ... [2022-03-20 00:40:42,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42" (1/1) ... [2022-03-20 00:40:42,757 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42" (1/1) ... [2022-03-20 00:40:42,760 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42" (1/1) ... [2022-03-20 00:40:42,761 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42" (1/1) ... [2022-03-20 00:40:42,762 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:40:42,763 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:40:42,763 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:40:42,763 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:40:42,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42" (1/1) ... [2022-03-20 00:40:42,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:40:42,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:42,831 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 00:40:42,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 00:40:42,865 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:40:42,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:40:42,866 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:40:42,866 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:40:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:40:42,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:40:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:40:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:40:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:40:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:40:42,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 00:40:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:40:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:40:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:40:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:40:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:40:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:40:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:40:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:40:42,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:40:42,918 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:40:42,920 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:40:43,031 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:40:43,041 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:40:43,041 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 00:40:43,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:40:43 BoogieIcfgContainer [2022-03-20 00:40:43,043 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:40:43,044 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:40:43,045 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:40:43,050 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:40:43,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:40:42" (1/3) ... [2022-03-20 00:40:43,051 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192feb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:40:43, skipping insertion in model container [2022-03-20 00:40:43,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:40:42" (2/3) ... [2022-03-20 00:40:43,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@192feb81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:40:43, skipping insertion in model container [2022-03-20 00:40:43,052 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:40:43" (3/3) ... [2022-03-20 00:40:43,053 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound100.c [2022-03-20 00:40:43,061 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:40:43,061 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:40:43,094 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:40:43,099 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 00:40:43,099 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:40:43,111 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 00:40:43,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-03-20 00:40:43,115 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:43,116 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:43,116 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:43,121 INFO L85 PathProgramCache]: Analyzing trace with hash -587582002, now seen corresponding path program 1 times [2022-03-20 00:40:43,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:43,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686448763] [2022-03-20 00:40:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:43,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:43,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:43,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:40:43,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:43,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:40:43,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:43,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:40:43,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:43,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:40:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:43,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-03-20 00:40:43,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:43,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-03-20 00:40:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:43,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-03-20 00:40:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:43,282 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 00:40:43,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:43,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686448763] [2022-03-20 00:40:43,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686448763] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:40:43,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:40:43,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:40:43,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275837933] [2022-03-20 00:40:43,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:40:43,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:40:43,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:43,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:40:43,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:40:43,333 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:40:43,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:43,452 INFO L93 Difference]: Finished difference Result 73 states and 118 transitions. [2022-03-20 00:40:43,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:40:43,454 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2022-03-20 00:40:43,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:43,460 INFO L225 Difference]: With dead ends: 73 [2022-03-20 00:40:43,460 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 00:40:43,462 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:40:43,465 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:43,465 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 42 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:40:43,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 00:40:43,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 00:40:43,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 00:40:43,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2022-03-20 00:40:43,495 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2022-03-20 00:40:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:43,495 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2022-03-20 00:40:43,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:40:43,496 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2022-03-20 00:40:43,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 00:40:43,497 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:43,498 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:43,498 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:40:43,498 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:43,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:43,499 INFO L85 PathProgramCache]: Analyzing trace with hash 987777007, now seen corresponding path program 1 times [2022-03-20 00:40:43,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:43,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910841458] [2022-03-20 00:40:43,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:43,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:43,538 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:43,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [66041595] [2022-03-20 00:40:43,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:43,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:43,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:43,548 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:43,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 00:40:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:43,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:40:43,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 00:40:43,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:43,865 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 00:40:43,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:43,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910841458] [2022-03-20 00:40:43,866 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:43,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66041595] [2022-03-20 00:40:43,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66041595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:40:43,866 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:40:43,867 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-03-20 00:40:43,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596924637] [2022-03-20 00:40:43,867 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:43,868 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 00:40:43,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:43,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 00:40:43,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-03-20 00:40:43,869 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:40:43,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:43,940 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-03-20 00:40:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:40:43,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-03-20 00:40:43,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:43,942 INFO L225 Difference]: With dead ends: 52 [2022-03-20 00:40:43,942 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 00:40:43,943 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 81 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:40:43,943 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 19 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:43,944 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 184 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:40:43,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 00:40:43,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 00:40:43,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 00:40:43,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2022-03-20 00:40:43,952 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2022-03-20 00:40:43,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:43,953 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2022-03-20 00:40:43,953 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:40:43,953 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2022-03-20 00:40:43,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 00:40:43,954 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:43,954 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:43,988 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 00:40:44,188 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:44,189 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:44,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:44,189 INFO L85 PathProgramCache]: Analyzing trace with hash 561616070, now seen corresponding path program 1 times [2022-03-20 00:40:44,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:44,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057894073] [2022-03-20 00:40:44,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:44,190 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:44,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:44,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622878967] [2022-03-20 00:40:44,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:44,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:44,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:44,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:44,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 00:40:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:44,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 00:40:44,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 00:40:44,365 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-03-20 00:40:44,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:44,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057894073] [2022-03-20 00:40:44,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:44,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622878967] [2022-03-20 00:40:44,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622878967] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:40:44,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:40:44,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 00:40:44,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954248898] [2022-03-20 00:40:44,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:40:44,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:40:44,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:44,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:40:44,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:40:44,459 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 00:40:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:44,490 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-03-20 00:40:44,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:40:44,491 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 45 [2022-03-20 00:40:44,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:44,492 INFO L225 Difference]: With dead ends: 43 [2022-03-20 00:40:44,492 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 00:40:44,492 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:40:44,493 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 6 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:44,494 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 146 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:40:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 00:40:44,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 00:40:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 00:40:44,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2022-03-20 00:40:44,500 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 45 [2022-03-20 00:40:44,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:44,501 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2022-03-20 00:40:44,501 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2022-03-20 00:40:44,501 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2022-03-20 00:40:44,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 00:40:44,502 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:44,502 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:44,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:44,720 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-03-20 00:40:44,720 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:44,721 INFO L85 PathProgramCache]: Analyzing trace with hash -680064098, now seen corresponding path program 1 times [2022-03-20 00:40:44,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:44,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145589447] [2022-03-20 00:40:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:44,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:44,733 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:44,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930703890] [2022-03-20 00:40:44,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:44,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:44,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:44,735 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:44,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 00:40:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:44,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 00:40:44,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-03-20 00:40:44,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:45,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:45,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145589447] [2022-03-20 00:40:45,058 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:45,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930703890] [2022-03-20 00:40:45,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930703890] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:40:45,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:40:45,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-03-20 00:40:45,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171084790] [2022-03-20 00:40:45,059 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:45,059 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-20 00:40:45,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:45,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-20 00:40:45,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:40:45,060 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 00:40:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:45,181 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-03-20 00:40:45,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-20 00:40:45,182 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 50 [2022-03-20 00:40:45,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:45,183 INFO L225 Difference]: With dead ends: 54 [2022-03-20 00:40:45,183 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 00:40:45,183 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:40:45,184 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 26 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:45,184 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 194 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:40:45,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 00:40:45,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-03-20 00:40:45,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 28 states have internal predecessors, (31), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 00:40:45,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 65 transitions. [2022-03-20 00:40:45,191 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 65 transitions. Word has length 50 [2022-03-20 00:40:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:45,192 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 65 transitions. [2022-03-20 00:40:45,192 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-03-20 00:40:45,192 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 65 transitions. [2022-03-20 00:40:45,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 00:40:45,193 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:45,193 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:45,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:45,430 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:45,431 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:45,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:45,431 INFO L85 PathProgramCache]: Analyzing trace with hash 606548870, now seen corresponding path program 1 times [2022-03-20 00:40:45,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:45,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507045279] [2022-03-20 00:40:45,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:45,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:45,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:45,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675243499] [2022-03-20 00:40:45,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:45,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:45,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:45,444 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:45,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 00:40:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:45,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-20 00:40:45,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-03-20 00:40:45,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:45,809 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-03-20 00:40:45,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:45,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507045279] [2022-03-20 00:40:45,809 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:45,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675243499] [2022-03-20 00:40:45,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675243499] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:40:45,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:40:45,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 00:40:45,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742633658] [2022-03-20 00:40:45,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:40:45,811 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:40:45,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:45,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:40:45,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:40:45,812 INFO L87 Difference]: Start difference. First operand 51 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 00:40:45,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:45,876 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-03-20 00:40:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:40:45,876 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 55 [2022-03-20 00:40:45,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:45,878 INFO L225 Difference]: With dead ends: 58 [2022-03-20 00:40:45,878 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 00:40:45,879 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:40:45,880 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 7 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:45,882 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 163 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:40:45,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 00:40:45,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-03-20 00:40:45,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 00:40:45,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 00:40:45,901 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 55 [2022-03-20 00:40:45,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:45,902 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 00:40:45,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 00:40:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 00:40:45,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 00:40:45,908 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:45,908 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:45,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:46,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:46,129 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:46,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:46,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1584976990, now seen corresponding path program 1 times [2022-03-20 00:40:46,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:46,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281701952] [2022-03-20 00:40:46,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:46,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:46,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:46,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472769223] [2022-03-20 00:40:46,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:46,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:46,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:46,145 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:46,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 00:40:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:46,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-20 00:40:46,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-03-20 00:40:46,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:46,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:46,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281701952] [2022-03-20 00:40:46,442 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:46,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472769223] [2022-03-20 00:40:46,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472769223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:40:46,443 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:40:46,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-03-20 00:40:46,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885714051] [2022-03-20 00:40:46,443 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:46,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-20 00:40:46,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:46,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-20 00:40:46,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:40:46,444 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 00:40:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:46,515 INFO L93 Difference]: Finished difference Result 62 states and 74 transitions. [2022-03-20 00:40:46,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:40:46,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2022-03-20 00:40:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:46,517 INFO L225 Difference]: With dead ends: 62 [2022-03-20 00:40:46,517 INFO L226 Difference]: Without dead ends: 60 [2022-03-20 00:40:46,517 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:40:46,517 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 12 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:46,518 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 154 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:40:46,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-03-20 00:40:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2022-03-20 00:40:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.121212121212121) internal successors, (37), 34 states have internal predecessors, (37), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-03-20 00:40:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2022-03-20 00:40:46,524 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 60 [2022-03-20 00:40:46,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:46,524 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2022-03-20 00:40:46,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-03-20 00:40:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2022-03-20 00:40:46,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-03-20 00:40:46,525 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:46,525 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:46,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:46,744 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:46,745 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:46,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:46,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1682830289, now seen corresponding path program 1 times [2022-03-20 00:40:46,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:46,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093857446] [2022-03-20 00:40:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:46,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:46,756 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:46,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332530342] [2022-03-20 00:40:46,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:46,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:46,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:46,759 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:46,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 00:40:46,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:46,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 00:40:46,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:46,942 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 00:40:46,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2022-03-20 00:40:47,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:47,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093857446] [2022-03-20 00:40:47,052 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:47,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332530342] [2022-03-20 00:40:47,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332530342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:40:47,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:40:47,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-03-20 00:40:47,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941048754] [2022-03-20 00:40:47,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:47,053 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:40:47,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:47,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:40:47,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:40:47,054 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 00:40:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:47,173 INFO L93 Difference]: Finished difference Result 106 states and 146 transitions. [2022-03-20 00:40:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 00:40:47,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 69 [2022-03-20 00:40:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:47,174 INFO L225 Difference]: With dead ends: 106 [2022-03-20 00:40:47,174 INFO L226 Difference]: Without dead ends: 98 [2022-03-20 00:40:47,175 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:40:47,175 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 30 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:47,175 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 333 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:40:47,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-20 00:40:47,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 89. [2022-03-20 00:40:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.1914893617021276) internal successors, (56), 48 states have internal predecessors, (56), 34 states have call successors, (34), 8 states have call predecessors, (34), 7 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 00:40:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 122 transitions. [2022-03-20 00:40:47,186 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 122 transitions. Word has length 69 [2022-03-20 00:40:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:47,187 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 122 transitions. [2022-03-20 00:40:47,187 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-03-20 00:40:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 122 transitions. [2022-03-20 00:40:47,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 00:40:47,187 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:47,188 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:47,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 00:40:47,405 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:47,406 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:47,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:47,406 INFO L85 PathProgramCache]: Analyzing trace with hash 376741854, now seen corresponding path program 1 times [2022-03-20 00:40:47,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:47,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862219937] [2022-03-20 00:40:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:47,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:47,416 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:47,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240373702] [2022-03-20 00:40:47,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:47,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:47,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:47,432 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:47,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 00:40:47,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:47,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-20 00:40:47,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:47,638 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 00:40:47,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2022-03-20 00:40:47,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:47,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862219937] [2022-03-20 00:40:47,776 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:47,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240373702] [2022-03-20 00:40:47,777 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240373702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:40:47,777 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:40:47,777 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 00:40:47,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981919645] [2022-03-20 00:40:47,777 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:47,777 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-20 00:40:47,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:47,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-20 00:40:47,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:40:47,778 INFO L87 Difference]: Start difference. First operand 89 states and 122 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 00:40:47,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:47,998 INFO L93 Difference]: Finished difference Result 132 states and 187 transitions. [2022-03-20 00:40:47,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 00:40:47,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) Word has length 75 [2022-03-20 00:40:47,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:48,001 INFO L225 Difference]: With dead ends: 132 [2022-03-20 00:40:48,001 INFO L226 Difference]: Without dead ends: 128 [2022-03-20 00:40:48,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 141 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-20 00:40:48,002 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:48,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 397 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 00:40:48,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-03-20 00:40:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 96. [2022-03-20 00:40:48,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 53 states have internal predecessors, (60), 36 states have call successors, (36), 9 states have call predecessors, (36), 8 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 00:40:48,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 130 transitions. [2022-03-20 00:40:48,015 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 130 transitions. Word has length 75 [2022-03-20 00:40:48,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:48,015 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 130 transitions. [2022-03-20 00:40:48,016 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (19), 6 states have call predecessors, (19), 6 states have call successors, (19) [2022-03-20 00:40:48,016 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 130 transitions. [2022-03-20 00:40:48,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 00:40:48,016 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:48,017 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:48,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-03-20 00:40:48,231 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:48,231 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:48,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1245952186, now seen corresponding path program 2 times [2022-03-20 00:40:48,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:48,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158088845] [2022-03-20 00:40:48,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:48,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:48,240 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:48,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [726143515] [2022-03-20 00:40:48,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:40:48,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:48,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:48,242 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:48,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 00:40:48,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:40:48,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:40:48,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2022-03-20 00:40:48,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-03-20 00:40:48,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:49,019 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-03-20 00:40:49,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:49,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158088845] [2022-03-20 00:40:49,020 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:49,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726143515] [2022-03-20 00:40:49,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726143515] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:40:49,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:40:49,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-03-20 00:40:49,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858816703] [2022-03-20 00:40:49,020 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:49,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 00:40:49,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:49,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 00:40:49,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2022-03-20 00:40:49,021 INFO L87 Difference]: Start difference. First operand 96 states and 130 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 00:40:50,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:50,246 INFO L93 Difference]: Finished difference Result 128 states and 169 transitions. [2022-03-20 00:40:50,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-20 00:40:50,246 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 80 [2022-03-20 00:40:50,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:50,247 INFO L225 Difference]: With dead ends: 128 [2022-03-20 00:40:50,247 INFO L226 Difference]: Without dead ends: 126 [2022-03-20 00:40:50,248 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-03-20 00:40:50,248 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 40 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:50,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 305 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 00:40:50,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-03-20 00:40:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 108. [2022-03-20 00:40:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 36 states have call successors, (36), 12 states have call predecessors, (36), 11 states have return successors, (34), 33 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-20 00:40:50,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 139 transitions. [2022-03-20 00:40:50,262 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 139 transitions. Word has length 80 [2022-03-20 00:40:50,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:50,262 INFO L478 AbstractCegarLoop]: Abstraction has 108 states and 139 transitions. [2022-03-20 00:40:50,262 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 11 states have internal predecessors, (34), 8 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-03-20 00:40:50,262 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2022-03-20 00:40:50,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-03-20 00:40:50,263 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:50,263 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:50,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:50,481 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-03-20 00:40:50,481 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:50,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:50,482 INFO L85 PathProgramCache]: Analyzing trace with hash 901388446, now seen corresponding path program 3 times [2022-03-20 00:40:50,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:50,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631795946] [2022-03-20 00:40:50,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:50,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:50,504 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:50,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2141761515] [2022-03-20 00:40:50,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:40:50,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:50,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:50,508 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:50,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 00:40:50,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 00:40:50,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:40:50,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 36 conjunts are in the unsatisfiable core [2022-03-20 00:40:50,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2022-03-20 00:40:50,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:51,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:51,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631795946] [2022-03-20 00:40:51,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:51,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141761515] [2022-03-20 00:40:51,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141761515] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:40:51,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:40:51,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-03-20 00:40:51,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825387237] [2022-03-20 00:40:51,025 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:51,025 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:40:51,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:51,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:40:51,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:40:51,026 INFO L87 Difference]: Start difference. First operand 108 states and 139 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 00:40:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:51,199 INFO L93 Difference]: Finished difference Result 144 states and 181 transitions. [2022-03-20 00:40:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 00:40:51,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 85 [2022-03-20 00:40:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:51,201 INFO L225 Difference]: With dead ends: 144 [2022-03-20 00:40:51,201 INFO L226 Difference]: Without dead ends: 142 [2022-03-20 00:40:51,201 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:40:51,202 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 20 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:51,202 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 233 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:40:51,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-03-20 00:40:51,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2022-03-20 00:40:51,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.139240506329114) internal successors, (90), 81 states have internal predecessors, (90), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2022-03-20 00:40:51,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 176 transitions. [2022-03-20 00:40:51,219 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 176 transitions. Word has length 85 [2022-03-20 00:40:51,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:51,220 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 176 transitions. [2022-03-20 00:40:51,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-03-20 00:40:51,220 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2022-03-20 00:40:51,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 00:40:51,220 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:51,221 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:51,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:51,438 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-03-20 00:40:51,439 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:51,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:51,439 INFO L85 PathProgramCache]: Analyzing trace with hash -686534738, now seen corresponding path program 1 times [2022-03-20 00:40:51,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:51,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191160866] [2022-03-20 00:40:51,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:51,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:51,447 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:51,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1074567493] [2022-03-20 00:40:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:51,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:51,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:51,449 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:51,475 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 00:40:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:51,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 37 conjunts are in the unsatisfiable core [2022-03-20 00:40:51,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 00:40:51,878 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:52,201 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-03-20 00:40:52,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:52,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191160866] [2022-03-20 00:40:52,202 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:52,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074567493] [2022-03-20 00:40:52,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074567493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:40:52,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:40:52,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-20 00:40:52,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382436994] [2022-03-20 00:40:52,202 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:52,203 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-20 00:40:52,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:52,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-20 00:40:52,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:40:52,204 INFO L87 Difference]: Start difference. First operand 139 states and 176 transitions. Second operand has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 00:40:54,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:54,011 INFO L93 Difference]: Finished difference Result 228 states and 311 transitions. [2022-03-20 00:40:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 00:40:54,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) Word has length 91 [2022-03-20 00:40:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:54,013 INFO L225 Difference]: With dead ends: 228 [2022-03-20 00:40:54,013 INFO L226 Difference]: Without dead ends: 220 [2022-03-20 00:40:54,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=692, Unknown=0, NotChecked=0, Total=870 [2022-03-20 00:40:54,014 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 53 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:54,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 440 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 00:40:54,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-03-20 00:40:54,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2022-03-20 00:40:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 116 states have (on average 1.1810344827586208) internal successors, (137), 117 states have internal predecessors, (137), 81 states have call successors, (81), 19 states have call predecessors, (81), 18 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-20 00:40:54,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 297 transitions. [2022-03-20 00:40:54,048 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 297 transitions. Word has length 91 [2022-03-20 00:40:54,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:54,049 INFO L478 AbstractCegarLoop]: Abstraction has 216 states and 297 transitions. [2022-03-20 00:40:54,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.75) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (25), 7 states have call predecessors, (25), 7 states have call successors, (25) [2022-03-20 00:40:54,049 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 297 transitions. [2022-03-20 00:40:54,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-03-20 00:40:54,050 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:54,051 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:54,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:54,268 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-20 00:40:54,268 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:54,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash -428114403, now seen corresponding path program 1 times [2022-03-20 00:40:54,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:54,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465445270] [2022-03-20 00:40:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:54,290 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:54,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560310047] [2022-03-20 00:40:54,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:54,290 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:54,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:54,299 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:54,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 00:40:54,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:40:54,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-20 00:40:54,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:54,957 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-03-20 00:40:54,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:40:55,108 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:40:57,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:57,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465445270] [2022-03-20 00:40:57,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:57,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560310047] [2022-03-20 00:40:57,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560310047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:40:57,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:40:57,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-20 00:40:57,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726118726] [2022-03-20 00:40:57,318 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:40:57,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 00:40:57,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:57,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 00:40:57,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-03-20 00:40:57,319 INFO L87 Difference]: Start difference. First operand 216 states and 297 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 00:40:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:57,813 INFO L93 Difference]: Finished difference Result 226 states and 306 transitions. [2022-03-20 00:40:57,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 00:40:57,814 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) Word has length 107 [2022-03-20 00:40:57,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:57,815 INFO L225 Difference]: With dead ends: 226 [2022-03-20 00:40:57,815 INFO L226 Difference]: Without dead ends: 224 [2022-03-20 00:40:57,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-03-20 00:40:57,816 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 24 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:57,816 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 362 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 00:40:57,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-03-20 00:40:57,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2022-03-20 00:40:57,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 119 states have (on average 1.1764705882352942) internal successors, (140), 120 states have internal predecessors, (140), 81 states have call successors, (81), 20 states have call predecessors, (81), 19 states have return successors, (79), 79 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-20 00:40:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 300 transitions. [2022-03-20 00:40:57,886 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 300 transitions. Word has length 107 [2022-03-20 00:40:57,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:57,886 INFO L478 AbstractCegarLoop]: Abstraction has 220 states and 300 transitions. [2022-03-20 00:40:57,886 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 6 states have call predecessors, (18), 5 states have call successors, (18) [2022-03-20 00:40:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 300 transitions. [2022-03-20 00:40:57,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 00:40:57,887 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:57,887 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:57,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:58,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-03-20 00:40:58,095 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:58,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1979573154, now seen corresponding path program 4 times [2022-03-20 00:40:58,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:58,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577877531] [2022-03-20 00:40:58,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:58,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:58,104 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:58,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1147816433] [2022-03-20 00:40:58,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 00:40:58,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:58,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:58,116 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:58,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 00:40:58,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 00:40:58,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:40:58,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-20 00:40:58,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:40:58,361 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-03-20 00:40:58,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:40:58,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:40:58,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577877531] [2022-03-20 00:40:58,361 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:40:58,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147816433] [2022-03-20 00:40:58,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147816433] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:40:58,362 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:40:58,362 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:40:58,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929062889] [2022-03-20 00:40:58,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:40:58,362 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:40:58,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:40:58,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:40:58,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:40:58,363 INFO L87 Difference]: Start difference. First operand 220 states and 300 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-20 00:40:58,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:40:58,423 INFO L93 Difference]: Finished difference Result 281 states and 378 transitions. [2022-03-20 00:40:58,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 00:40:58,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) Word has length 110 [2022-03-20 00:40:58,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:40:58,426 INFO L225 Difference]: With dead ends: 281 [2022-03-20 00:40:58,426 INFO L226 Difference]: Without dead ends: 201 [2022-03-20 00:40:58,429 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-20 00:40:58,429 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:40:58,429 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 183 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:40:58,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-03-20 00:40:58,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 154. [2022-03-20 00:40:58,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 00:40:58,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-03-20 00:40:58,454 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 110 [2022-03-20 00:40:58,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:40:58,455 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-03-20 00:40:58,455 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 3 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 3 states have call predecessors, (18), 3 states have call successors, (18) [2022-03-20 00:40:58,455 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-03-20 00:40:58,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-03-20 00:40:58,456 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:40:58,456 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:40:58,476 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-20 00:40:58,676 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 00:40:58,676 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:40:58,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:40:58,677 INFO L85 PathProgramCache]: Analyzing trace with hash -2138166692, now seen corresponding path program 2 times [2022-03-20 00:40:58,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:40:58,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578711778] [2022-03-20 00:40:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:40:58,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:40:58,684 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:40:58,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1173794868] [2022-03-20 00:40:58,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:40:58,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:40:58,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:40:58,685 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:40:58,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-20 00:40:58,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:40:58,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:40:58,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 71 conjunts are in the unsatisfiable core [2022-03-20 00:40:58,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 142 proven. 88 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-03-20 00:41:00,079 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:41:03,990 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:41:05,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:05,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578711778] [2022-03-20 00:41:05,350 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:05,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173794868] [2022-03-20 00:41:05,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173794868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:41:05,350 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:41:05,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-03-20 00:41:05,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969484264] [2022-03-20 00:41:05,351 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:41:05,351 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-20 00:41:05,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:05,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-20 00:41:05,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=437, Unknown=1, NotChecked=0, Total=552 [2022-03-20 00:41:05,351 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 00:41:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:41:06,292 INFO L93 Difference]: Finished difference Result 194 states and 250 transitions. [2022-03-20 00:41:06,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-20 00:41:06,292 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 129 [2022-03-20 00:41:06,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:41:06,293 INFO L225 Difference]: With dead ends: 194 [2022-03-20 00:41:06,293 INFO L226 Difference]: Without dead ends: 192 [2022-03-20 00:41:06,294 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 141 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=159, Invalid=652, Unknown=1, NotChecked=0, Total=812 [2022-03-20 00:41:06,295 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 39 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 00:41:06,295 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 292 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 631 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 00:41:06,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-03-20 00:41:06,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 154. [2022-03-20 00:41:06,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 53 states have call successors, (53), 17 states have call predecessors, (53), 16 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2022-03-20 00:41:06,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2022-03-20 00:41:06,318 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 129 [2022-03-20 00:41:06,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:41:06,318 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2022-03-20 00:41:06,318 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2022-03-20 00:41:06,319 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2022-03-20 00:41:06,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 00:41:06,319 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:41:06,320 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:41:06,337 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-03-20 00:41:06,533 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 00:41:06,533 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:41:06,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:41:06,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1899875875, now seen corresponding path program 3 times [2022-03-20 00:41:06,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:41:06,534 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958706060] [2022-03-20 00:41:06,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:41:06,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:41:06,540 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:41:06,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [85682025] [2022-03-20 00:41:06,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:41:06,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:41:06,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:41:06,543 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:41:06,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-20 00:41:06,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-20 00:41:06,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:41:06,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 69 conjunts are in the unsatisfiable core [2022-03-20 00:41:06,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:41:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 100 proven. 48 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2022-03-20 00:41:07,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:41:50,299 INFO L134 CoverageAnalysis]: Checked inductivity of 550 backedges. 101 proven. 45 refuted. 2 times theorem prover too weak. 402 trivial. 0 not checked. [2022-03-20 00:41:50,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:41:50,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958706060] [2022-03-20 00:41:50,300 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:41:50,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85682025] [2022-03-20 00:41:50,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85682025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:41:50,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:41:50,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 22 [2022-03-20 00:41:50,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185924775] [2022-03-20 00:41:50,300 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:41:50,301 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 00:41:50,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:41:50,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 00:41:50,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=352, Unknown=5, NotChecked=0, Total=462 [2022-03-20 00:41:50,302 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-03-20 00:41:52,343 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:42:09,014 WARN L232 SmtUtils]: Spent 12.87s on a formula simplification that was a NOOP. DAG size: 128 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:43:13,921 WARN L232 SmtUtils]: Spent 1.04m on a formula simplification that was a NOOP. DAG size: 124 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:43:16,032 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:18,097 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:20,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:22,522 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:25,667 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:28,181 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:35,703 WARN L232 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 58 DAG size of output: 57 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:43:37,871 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:39,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.90s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:42,157 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:44,400 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:47,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:52,721 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:54,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:43:57,218 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:05,675 WARN L232 SmtUtils]: Spent 8.19s on a formula simplification that was a NOOP. DAG size: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:44:12,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:14,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:17,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:21,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:23,588 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:25,596 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:27,620 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:29,644 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:44:29,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:44:29,913 INFO L93 Difference]: Finished difference Result 250 states and 325 transitions. [2022-03-20 00:44:29,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 00:44:29,913 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) Word has length 132 [2022-03-20 00:44:29,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:44:29,915 INFO L225 Difference]: With dead ends: 250 [2022-03-20 00:44:29,915 INFO L226 Difference]: Without dead ends: 248 [2022-03-20 00:44:29,915 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 241 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 120.5s TimeCoverageRelationStatistics Valid=347, Invalid=976, Unknown=9, NotChecked=0, Total=1332 [2022-03-20 00:44:29,916 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 107 mSDsluCounter, 454 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 202 mSolverCounterUnsat, 21 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 21 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.2s IncrementalHoareTripleChecker+Time [2022-03-20 00:44:29,916 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 503 Invalid, 907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 684 Invalid, 21 Unknown, 0 Unchecked, 55.2s Time] [2022-03-20 00:44:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-03-20 00:44:29,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 232. [2022-03-20 00:44:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 127 states have (on average 1.125984251968504) internal successors, (143), 129 states have internal predecessors, (143), 81 states have call successors, (81), 24 states have call predecessors, (81), 23 states have return successors, (79), 78 states have call predecessors, (79), 79 states have call successors, (79) [2022-03-20 00:44:29,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 303 transitions. [2022-03-20 00:44:29,996 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 303 transitions. Word has length 132 [2022-03-20 00:44:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:44:29,997 INFO L478 AbstractCegarLoop]: Abstraction has 232 states and 303 transitions. [2022-03-20 00:44:29,997 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 20 states have internal predecessors, (50), 12 states have call successors, (42), 2 states have call predecessors, (42), 2 states have return successors, (39), 13 states have call predecessors, (39), 11 states have call successors, (39) [2022-03-20 00:44:29,997 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 303 transitions. [2022-03-20 00:44:29,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 00:44:29,998 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:44:29,998 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:44:30,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-20 00:44:30,207 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:30,207 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:44:30,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:44:30,207 INFO L85 PathProgramCache]: Analyzing trace with hash -896647763, now seen corresponding path program 2 times [2022-03-20 00:44:30,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:44:30,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492326013] [2022-03-20 00:44:30,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:44:30,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:44:30,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:44:30,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1927489650] [2022-03-20 00:44:30,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:44:30,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:44:30,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:44:30,224 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:44:30,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-20 00:44:30,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:44:30,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:44:30,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 67 conjunts are in the unsatisfiable core [2022-03-20 00:44:30,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:44:31,897 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-20 00:44:31,897 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:44:32,762 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:44:32,763 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:44:48,256 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 69 proven. 90 refuted. 0 times theorem prover too weak. 456 trivial. 0 not checked. [2022-03-20 00:44:48,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:44:48,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492326013] [2022-03-20 00:44:48,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:44:48,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927489650] [2022-03-20 00:44:48,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927489650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:44:48,258 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:44:48,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2022-03-20 00:44:48,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975495502] [2022-03-20 00:44:48,259 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:44:48,260 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 00:44:48,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:44:48,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 00:44:48,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=673, Unknown=4, NotChecked=0, Total=812 [2022-03-20 00:44:48,261 INFO L87 Difference]: Start difference. First operand 232 states and 303 transitions. Second operand has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-20 00:44:58,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:01,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:03,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:05,454 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:07,464 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:14,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:16,282 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:19,005 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:21,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:24,533 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:39,824 WARN L232 SmtUtils]: Spent 13.65s on a formula simplification. DAG size of input: 118 DAG size of output: 116 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:45:54,968 WARN L232 SmtUtils]: Spent 11.78s on a formula simplification. DAG size of input: 102 DAG size of output: 100 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:45:57,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:45:59,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:01,895 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:21,172 WARN L232 SmtUtils]: Spent 15.71s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:46:23,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:25,754 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:27,757 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:31,049 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:33,052 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:46:35,054 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:10,953 WARN L232 SmtUtils]: Spent 33.18s on a formula simplification. DAG size of input: 122 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:47:14,334 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:49,735 WARN L232 SmtUtils]: Spent 32.52s on a formula simplification. DAG size of input: 98 DAG size of output: 96 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:47:52,762 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:54,764 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:47:56,767 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:06,089 WARN L232 SmtUtils]: Spent 7.68s on a formula simplification. DAG size of input: 94 DAG size of output: 92 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:48:09,543 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:28,168 WARN L232 SmtUtils]: Spent 10.29s on a formula simplification. DAG size of input: 100 DAG size of output: 98 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:48:31,372 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:33,455 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:44,645 WARN L232 SmtUtils]: Spent 8.44s on a formula simplification. DAG size of input: 99 DAG size of output: 97 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:48:49,479 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:56,402 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:48:58,829 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:49:01,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:49:01,008 INFO L93 Difference]: Finished difference Result 349 states and 478 transitions. [2022-03-20 00:49:01,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-20 00:49:01,009 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) Word has length 138 [2022-03-20 00:49:01,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:49:01,012 INFO L225 Difference]: With dead ends: 349 [2022-03-20 00:49:01,012 INFO L226 Difference]: Without dead ends: 341 [2022-03-20 00:49:01,013 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 246 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 185.3s TimeCoverageRelationStatistics Valid=886, Invalid=3526, Unknown=10, NotChecked=0, Total=4422 [2022-03-20 00:49:01,014 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 142 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 1090 mSolverCounterSat, 371 mSolverCounterUnsat, 28 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 80.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 1090 IncrementalHoareTripleChecker+Invalid, 28 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 81.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:49:01,014 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 846 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 1090 Invalid, 28 Unknown, 0 Unchecked, 81.1s Time] [2022-03-20 00:49:01,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2022-03-20 00:49:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 301. [2022-03-20 00:49:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 161 states have (on average 1.1366459627329193) internal successors, (183), 163 states have internal predecessors, (183), 113 states have call successors, (113), 27 states have call predecessors, (113), 26 states have return successors, (111), 110 states have call predecessors, (111), 111 states have call successors, (111) [2022-03-20 00:49:01,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 407 transitions. [2022-03-20 00:49:01,116 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 407 transitions. Word has length 138 [2022-03-20 00:49:01,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:49:01,116 INFO L478 AbstractCegarLoop]: Abstraction has 301 states and 407 transitions. [2022-03-20 00:49:01,117 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 states have internal predecessors, (52), 16 states have call successors, (44), 2 states have call predecessors, (44), 2 states have return successors, (41), 12 states have call predecessors, (41), 14 states have call successors, (41) [2022-03-20 00:49:01,117 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 407 transitions. [2022-03-20 00:49:01,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-03-20 00:49:01,118 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:49:01,118 INFO L499 BasicCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:49:01,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-20 00:49:01,334 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-20 00:49:01,334 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:49:01,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:49:01,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1224554493, now seen corresponding path program 4 times [2022-03-20 00:49:01,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:49:01,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718931074] [2022-03-20 00:49:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:49:01,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:49:01,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:49:01,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1858525326] [2022-03-20 00:49:01,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 00:49:01,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:49:01,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:49:01,342 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:49:01,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-20 00:49:01,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 00:49:01,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:49:01,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 99 conjunts are in the unsatisfiable core [2022-03-20 00:49:01,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:49:03,504 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:49:04,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 201 proven. 288 refuted. 0 times theorem prover too weak. 721 trivial. 0 not checked. [2022-03-20 00:49:04,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:49:11,232 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:49:14,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:49:14,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718931074] [2022-03-20 00:49:14,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:49:14,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858525326] [2022-03-20 00:49:14,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858525326] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-20 00:49:14,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:49:14,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2022-03-20 00:49:14,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468710859] [2022-03-20 00:49:14,580 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-03-20 00:49:14,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-20 00:49:14,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:49:14,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-20 00:49:14,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=648, Unknown=1, NotChecked=0, Total=812 [2022-03-20 00:49:14,581 INFO L87 Difference]: Start difference. First operand 301 states and 407 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-20 00:49:27,270 WARN L232 SmtUtils]: Spent 10.75s on a formula simplification. DAG size of input: 61 DAG size of output: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:49:29,794 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 00:49:30,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:49:30,455 INFO L93 Difference]: Finished difference Result 388 states and 519 transitions. [2022-03-20 00:49:30,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-20 00:49:30,456 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) Word has length 176 [2022-03-20 00:49:30,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:49:30,460 INFO L225 Difference]: With dead ends: 388 [2022-03-20 00:49:30,461 INFO L226 Difference]: Without dead ends: 386 [2022-03-20 00:49:30,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 185 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=207, Invalid=914, Unknown=1, NotChecked=0, Total=1122 [2022-03-20 00:49:30,461 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 46 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 978 mSolverCounterSat, 80 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 978 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-03-20 00:49:30,461 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 638 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 978 Invalid, 1 Unknown, 0 Unchecked, 4.7s Time] [2022-03-20 00:49:30,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2022-03-20 00:49:30,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 381. [2022-03-20 00:49:30,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 381 states, 205 states have (on average 1.1317073170731706) internal successors, (232), 207 states have internal predecessors, (232), 141 states have call successors, (141), 35 states have call predecessors, (141), 34 states have return successors, (139), 138 states have call predecessors, (139), 139 states have call successors, (139) [2022-03-20 00:49:30,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 381 states to 381 states and 512 transitions. [2022-03-20 00:49:30,594 INFO L78 Accepts]: Start accepts. Automaton has 381 states and 512 transitions. Word has length 176 [2022-03-20 00:49:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:49:30,594 INFO L478 AbstractCegarLoop]: Abstraction has 381 states and 512 transitions. [2022-03-20 00:49:30,594 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 12 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (30), 11 states have call predecessors, (30), 12 states have call successors, (30) [2022-03-20 00:49:30,594 INFO L276 IsEmpty]: Start isEmpty. Operand 381 states and 512 transitions. [2022-03-20 00:49:30,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-03-20 00:49:30,595 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:49:30,595 INFO L499 BasicCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:49:30,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-20 00:49:30,812 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-03-20 00:49:30,812 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:49:30,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:49:30,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1363924019, now seen corresponding path program 3 times [2022-03-20 00:49:30,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:49:30,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631648045] [2022-03-20 00:49:30,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:49:30,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:49:30,819 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:49:30,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1441091232] [2022-03-20 00:49:30,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:49:30,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:49:30,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:49:30,820 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:49:30,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-20 00:49:31,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 00:49:31,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:49:31,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-20 00:49:31,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:49:32,069 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:49:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 113 proven. 83 refuted. 0 times theorem prover too weak. 1113 trivial. 0 not checked. [2022-03-20 00:49:32,410 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:49:33,839 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:50:22,685 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:52:22,017 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-20 00:54:31,950 WARN L855 $PredicateComparison]: unable to prove that (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (or (forall ((v_main_~y~0_BEFORE_CALL_251 Int) (v_main_~p~0_BEFORE_CALL_181 Int) (v_main_~s~0_BEFORE_CALL_240 Int) (v_main_~r~0_BEFORE_CALL_191 Int) (v_main_~x~0_BEFORE_CALL_255 Int) (v_main_~b~0_BEFORE_CALL_224 Int) (v_main_~q~0_BEFORE_CALL_242 Int) (v_main_~k~0_BEFORE_CALL_128 Int)) (or (<= v_main_~b~0_BEFORE_CALL_224 0) (= (+ (* v_main_~y~0_BEFORE_CALL_251 (+ (* (- 1) (* v_main_~k~0_BEFORE_CALL_128 v_main_~s~0_BEFORE_CALL_240)) v_main_~r~0_BEFORE_CALL_191)) (* v_main_~x~0_BEFORE_CALL_255 (+ v_main_~p~0_BEFORE_CALL_181 (* (- 1) v_main_~k~0_BEFORE_CALL_128 v_main_~q~0_BEFORE_CALL_242)))) 0) (= (mod (* v_main_~k~0_BEFORE_CALL_128 v_main_~b~0_BEFORE_CALL_224) v_main_~b~0_BEFORE_CALL_224) 0))) (not (= |c___VERIFIER_assert_#in~cond| 1)))) is different from true