/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 15:12:00,819 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 15:12:00,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 15:12:00,854 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 15:12:00,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-04-06 15:12:00,873 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-04-06 15:12:00,873 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-04-06 15:12:00,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-04-06 15:12:00,876 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-04-06 15:12:00,877 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-04-06 15:12:00,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-04-06 15:12:00,884 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-04-06 15:12:00,887 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-04-06 15:12:00,888 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-04-06 15:12:00,888 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-04-06 15:12:00,889 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-04-06 15:12:00,890 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-04-06 15:12:00,896 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-04-06 15:12:00,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 15:12:00,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 15:12:00,904 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 15:12:00,905 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 15:12:00,915 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 15:12:00,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 15:12:00,916 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 15:12:00,917 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 15:12:00,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 15:12:00,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 15:12:00,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 15:12:00,917 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 15:12:00,917 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 15:12:00,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 15:12:00,918 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 15:12:00,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 15:12:00,918 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 15:12:00,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 15:12:00,918 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 15:12:00,918 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 15:12:00,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 15:12:00,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 15:12:00,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:12:00,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 15:12:00,919 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 15:12:00,919 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 15:12:00,919 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 15:12:00,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 15:12:00,919 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 15:12:00,920 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 15:12:01,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 15:12:01,125 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 15:12:01,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 15:12:01,129 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 15:12:01,129 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 15:12:01,130 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-04-06 15:12:01,180 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeda135a4/a3e0df04a69449c18ff874fced2c333b/FLAG6737befe4 [2022-04-06 15:12:01,495 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 15:12:01,495 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2022-04-06 15:12:01,500 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeda135a4/a3e0df04a69449c18ff874fced2c333b/FLAG6737befe4 [2022-04-06 15:12:01,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aeda135a4/a3e0df04a69449c18ff874fced2c333b [2022-04-06 15:12:01,927 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 15:12:01,928 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 15:12:01,931 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 15:12:01,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 15:12:01,933 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 15:12:01,934 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:12:01" (1/1) ... [2022-04-06 15:12:01,935 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ea02b9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:01, skipping insertion in model container [2022-04-06 15:12:01,935 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 03:12:01" (1/1) ... [2022-04-06 15:12:01,941 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 15:12:01,953 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 15:12:02,068 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/egcd2-ll.c[490,503] [2022-04-06 15:12:02,084 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:12:02,096 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 15:12:02,106 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/egcd2-ll.c[490,503] [2022-04-06 15:12:02,120 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 15:12:02,130 INFO L208 MainTranslator]: Completed translation [2022-04-06 15:12:02,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:02 WrapperNode [2022-04-06 15:12:02,131 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 15:12:02,132 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 15:12:02,132 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 15:12:02,132 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 15:12:02,141 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:02" (1/1) ... [2022-04-06 15:12:02,141 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:02" (1/1) ... [2022-04-06 15:12:02,146 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:02" (1/1) ... [2022-04-06 15:12:02,146 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:02" (1/1) ... [2022-04-06 15:12:02,150 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:02" (1/1) ... [2022-04-06 15:12:02,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:02" (1/1) ... [2022-04-06 15:12:02,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:02" (1/1) ... [2022-04-06 15:12:02,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 15:12:02,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 15:12:02,164 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 15:12:02,164 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 15:12:02,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:02" (1/1) ... [2022-04-06 15:12:02,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 15:12:02,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:02,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 15:12:02,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 15:12:02,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 15:12:02,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 15:12:02,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 15:12:02,237 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 15:12:02,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 15:12:02,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 15:12:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 15:12:02,238 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 15:12:02,239 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 15:12:02,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 15:12:02,239 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 15:12:02,240 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 15:12:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 15:12:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 15:12:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 15:12:02,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 15:12:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 15:12:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 15:12:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 15:12:02,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 15:12:02,294 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 15:12:02,295 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 15:12:02,410 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 15:12:02,416 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 15:12:02,416 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 15:12:02,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:12:02 BoogieIcfgContainer [2022-04-06 15:12:02,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 15:12:02,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 15:12:02,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 15:12:02,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 15:12:02,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 03:12:01" (1/3) ... [2022-04-06 15:12:02,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1564644a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:12:02, skipping insertion in model container [2022-04-06 15:12:02,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 03:12:02" (2/3) ... [2022-04-06 15:12:02,424 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1564644a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 03:12:02, skipping insertion in model container [2022-04-06 15:12:02,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 03:12:02" (3/3) ... [2022-04-06 15:12:02,425 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.c [2022-04-06 15:12:02,429 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 15:12:02,429 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 15:12:02,465 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 15:12:02,470 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 15:12:02,470 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 15:12:02,483 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 15:12:02,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 15:12:02,490 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:02,490 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:12:02,491 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:02,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1872307417, now seen corresponding path program 1 times [2022-04-06 15:12:02,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:02,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1623191580] [2022-04-06 15:12:02,511 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:02,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1872307417, now seen corresponding path program 2 times [2022-04-06 15:12:02,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:02,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031506228] [2022-04-06 15:12:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:02,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:02,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:02,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 15:12:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:02,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 15:12:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:02,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 15:12:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:02,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 15:12:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:02,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 15:12:02,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 15:12:02,722 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 15:12:02,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:02,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031506228] [2022-04-06 15:12:02,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031506228] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:02,723 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:02,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 15:12:02,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:02,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1623191580] [2022-04-06 15:12:02,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1623191580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:02,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:02,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 15:12:02,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703246029] [2022-04-06 15:12:02,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:02,730 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 15:12:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:02,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 15:12:02,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 15:12:02,788 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 15:12:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:02,910 INFO L93 Difference]: Finished difference Result 67 states and 106 transitions. [2022-04-06 15:12:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 15:12:02,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-06 15:12:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:02,919 INFO L225 Difference]: With dead ends: 67 [2022-04-06 15:12:02,919 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 15:12:02,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 15:12:02,929 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:02,931 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:12:02,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 15:12:02,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 15:12:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 15:12:02,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2022-04-06 15:12:02,984 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 32 [2022-04-06 15:12:02,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:02,985 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2022-04-06 15:12:02,985 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 15:12:02,985 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2022-04-06 15:12:02,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 15:12:02,988 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:02,988 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:12:02,989 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 15:12:02,989 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:02,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:02,991 INFO L85 PathProgramCache]: Analyzing trace with hash 310247117, now seen corresponding path program 1 times [2022-04-06 15:12:02,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:02,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [338368195] [2022-04-06 15:12:02,993 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:02,994 INFO L85 PathProgramCache]: Analyzing trace with hash 310247117, now seen corresponding path program 2 times [2022-04-06 15:12:02,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:02,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967367321] [2022-04-06 15:12:02,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:02,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:03,026 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:03,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [297076765] [2022-04-06 15:12:03,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:03,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:03,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:03,035 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:03,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 15:12:03,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:12:03,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:03,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:12:03,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 15:12:03,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 15:12:03,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:03,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967367321] [2022-04-06 15:12:03,439 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:03,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297076765] [2022-04-06 15:12:03,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297076765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:03,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:03,440 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 15:12:03,441 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:03,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [338368195] [2022-04-06 15:12:03,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [338368195] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:03,441 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:03,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 15:12:03,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121307192] [2022-04-06 15:12:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:03,442 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 15:12:03,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 15:12:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 15:12:03,443 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 15:12:03,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:03,598 INFO L93 Difference]: Finished difference Result 49 states and 64 transitions. [2022-04-06 15:12:03,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 15:12:03,598 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 15:12:03,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:03,599 INFO L225 Difference]: With dead ends: 49 [2022-04-06 15:12:03,600 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 15:12:03,600 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:12:03,601 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:03,601 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 119 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:12:03,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 15:12:03,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-04-06 15:12:03,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 15:12:03,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2022-04-06 15:12:03,624 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 33 [2022-04-06 15:12:03,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:03,624 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2022-04-06 15:12:03,625 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 15:12:03,625 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2022-04-06 15:12:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 15:12:03,626 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:03,626 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:12:03,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:03,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:03,827 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:03,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1036600877, now seen corresponding path program 1 times [2022-04-06 15:12:03,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:03,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1006809723] [2022-04-06 15:12:03,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1036600877, now seen corresponding path program 2 times [2022-04-06 15:12:03,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:03,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147239355] [2022-04-06 15:12:03,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:03,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:03,844 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:03,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850460923] [2022-04-06 15:12:03,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:03,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:03,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:03,852 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:03,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 15:12:03,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 15:12:03,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:03,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 15:12:03,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:03,985 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 15:12:03,985 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:12:03,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147239355] [2022-04-06 15:12:03,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:03,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850460923] [2022-04-06 15:12:03,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850460923] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:03,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:03,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:12:03,987 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:03,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1006809723] [2022-04-06 15:12:03,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1006809723] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:03,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:03,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:12:03,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000799854] [2022-04-06 15:12:03,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:03,988 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:12:03,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:03,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:12:03,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:12:03,989 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 15:12:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:04,045 INFO L93 Difference]: Finished difference Result 47 states and 60 transitions. [2022-04-06 15:12:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:12:04,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 34 [2022-04-06 15:12:04,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:04,050 INFO L225 Difference]: With dead ends: 47 [2022-04-06 15:12:04,050 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 15:12:04,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 15:12:04,059 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:04,059 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 134 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:12:04,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 15:12:04,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2022-04-06 15:12:04,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 15:12:04,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-04-06 15:12:04,075 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 34 [2022-04-06 15:12:04,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:04,076 INFO L478 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-04-06 15:12:04,076 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 15:12:04,076 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-04-06 15:12:04,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-04-06 15:12:04,080 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:04,080 INFO L499 BasicCegarLoop]: trace histogram [4, 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] [2022-04-06 15:12:04,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:04,299 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 15:12:04,299 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:04,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash -844413996, now seen corresponding path program 1 times [2022-04-06 15:12:04,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:04,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2895497] [2022-04-06 15:12:04,300 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:04,301 INFO L85 PathProgramCache]: Analyzing trace with hash -844413996, now seen corresponding path program 2 times [2022-04-06 15:12:04,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:04,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034644446] [2022-04-06 15:12:04,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:04,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:04,311 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:04,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1022328925] [2022-04-06 15:12:04,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:04,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:04,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:04,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:04,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 15:12:04,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:12:04,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:04,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 15:12:04,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:04,528 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-04-06 15:12:04,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 15:12:04,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:04,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034644446] [2022-04-06 15:12:04,640 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:04,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022328925] [2022-04-06 15:12:04,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022328925] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 15:12:04,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:12:04,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 15:12:04,641 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:04,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2895497] [2022-04-06 15:12:04,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2895497] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:04,641 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:04,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:12:04,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670613265] [2022-04-06 15:12:04,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:04,642 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:12:04,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:04,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:12:04,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:12:04,642 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 15:12:04,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:04,682 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-04-06 15:12:04,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:12:04,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2022-04-06 15:12:04,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:04,684 INFO L225 Difference]: With dead ends: 55 [2022-04-06 15:12:04,685 INFO L226 Difference]: Without dead ends: 53 [2022-04-06 15:12:04,685 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:12:04,686 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 7 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:04,686 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 141 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:12:04,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-04-06 15:12:04,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-04-06 15:12:04,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 18 states have call successors, (18), 6 states have call predecessors, (18), 5 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:12:04,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 66 transitions. [2022-04-06 15:12:04,698 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 66 transitions. Word has length 39 [2022-04-06 15:12:04,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:04,698 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 66 transitions. [2022-04-06 15:12:04,698 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 15:12:04,699 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 66 transitions. [2022-04-06 15:12:04,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 15:12:04,699 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:04,700 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-06 15:12:04,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:04,915 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:04,915 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:04,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:04,916 INFO L85 PathProgramCache]: Analyzing trace with hash -644493747, now seen corresponding path program 1 times [2022-04-06 15:12:04,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:04,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1139115078] [2022-04-06 15:12:04,917 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:04,917 INFO L85 PathProgramCache]: Analyzing trace with hash -644493747, now seen corresponding path program 2 times [2022-04-06 15:12:04,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:04,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710052510] [2022-04-06 15:12:04,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:04,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:04,926 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:04,926 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364584877] [2022-04-06 15:12:04,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:04,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:04,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:04,927 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:04,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 15:12:04,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:12:04,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:04,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjunts are in the unsatisfiable core [2022-04-06 15:12:04,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:05,140 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-04-06 15:12:05,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:05,257 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 15:12:05,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:05,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710052510] [2022-04-06 15:12:05,258 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:05,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364584877] [2022-04-06 15:12:05,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364584877] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 15:12:05,258 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:12:05,258 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 15:12:05,258 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:05,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1139115078] [2022-04-06 15:12:05,259 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1139115078] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:05,259 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:05,259 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:12:05,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410904375] [2022-04-06 15:12:05,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:05,259 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:12:05,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:05,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:12:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:12:05,260 INFO L87 Difference]: Start difference. First operand 52 states and 66 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 15:12:05,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:05,324 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-04-06 15:12:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:12:05,325 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2022-04-06 15:12:05,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:05,326 INFO L225 Difference]: With dead ends: 59 [2022-04-06 15:12:05,326 INFO L226 Difference]: Without dead ends: 57 [2022-04-06 15:12:05,326 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:12:05,327 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 7 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:05,327 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:12:05,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-04-06 15:12:05,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-04-06 15:12:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 34 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:12:05,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-04-06 15:12:05,338 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 44 [2022-04-06 15:12:05,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:05,338 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-04-06 15:12:05,339 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 15:12:05,339 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-04-06 15:12:05,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 15:12:05,339 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:05,340 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-06 15:12:05,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:05,559 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:05,559 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:05,560 INFO L85 PathProgramCache]: Analyzing trace with hash -79102156, now seen corresponding path program 1 times [2022-04-06 15:12:05,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:05,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1287868374] [2022-04-06 15:12:05,561 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:05,561 INFO L85 PathProgramCache]: Analyzing trace with hash -79102156, now seen corresponding path program 2 times [2022-04-06 15:12:05,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:05,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276214018] [2022-04-06 15:12:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:05,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:05,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:05,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530405768] [2022-04-06 15:12:05,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:05,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:05,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:05,572 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:05,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 15:12:05,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:12:05,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 15:12:05,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:05,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-04-06 15:12:05,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:06,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:06,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276214018] [2022-04-06 15:12:06,145 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:06,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530405768] [2022-04-06 15:12:06,145 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530405768] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:12:06,145 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:12:06,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 15:12:06,146 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:06,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1287868374] [2022-04-06 15:12:06,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1287868374] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:06,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:06,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 15:12:06,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181394468] [2022-04-06 15:12:06,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:06,147 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 15:12:06,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:06,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 15:12:06,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=52, Unknown=1, NotChecked=0, Total=72 [2022-04-06 15:12:06,147 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 15:12:06,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:06,252 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2022-04-06 15:12:06,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 15:12:06,252 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-04-06 15:12:06,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:06,253 INFO L225 Difference]: With dead ends: 63 [2022-04-06 15:12:06,253 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 15:12:06,253 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=79, Unknown=1, NotChecked=0, Total=110 [2022-04-06 15:12:06,254 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 12 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:06,254 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 115 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:12:06,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 15:12:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-04-06 15:12:06,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 37 states have internal predecessors, (38), 18 states have call successors, (18), 8 states have call predecessors, (18), 7 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 15:12:06,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-04-06 15:12:06,265 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 49 [2022-04-06 15:12:06,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:06,266 INFO L478 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-04-06 15:12:06,266 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 15:12:06,266 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-04-06 15:12:06,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 15:12:06,266 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:06,267 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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] [2022-04-06 15:12:06,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:06,482 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:06,482 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:06,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:06,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2126113716, now seen corresponding path program 1 times [2022-04-06 15:12:06,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:06,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [863615451] [2022-04-06 15:12:06,483 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:06,483 INFO L85 PathProgramCache]: Analyzing trace with hash -2126113716, now seen corresponding path program 2 times [2022-04-06 15:12:06,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:06,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411780963] [2022-04-06 15:12:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:06,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:06,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [328462596] [2022-04-06 15:12:06,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:06,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:06,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:06,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:06,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 15:12:06,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:12:06,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:06,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 15:12:06,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:06,659 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 15:12:06,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:06,772 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 15:12:06,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:06,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411780963] [2022-04-06 15:12:06,773 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:06,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328462596] [2022-04-06 15:12:06,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328462596] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:06,773 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:06,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2022-04-06 15:12:06,774 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:06,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [863615451] [2022-04-06 15:12:06,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [863615451] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:06,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:06,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 15:12:06,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102706343] [2022-04-06 15:12:06,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:06,774 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 15:12:06,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:06,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 15:12:06,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 15:12:06,775 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-04-06 15:12:06,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:06,878 INFO L93 Difference]: Finished difference Result 88 states and 117 transitions. [2022-04-06 15:12:06,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 15:12:06,879 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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 56 [2022-04-06 15:12:06,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:06,882 INFO L225 Difference]: With dead ends: 88 [2022-04-06 15:12:06,883 INFO L226 Difference]: Without dead ends: 86 [2022-04-06 15:12:06,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 15:12:06,884 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 7 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:06,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 182 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:12:06,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-04-06 15:12:06,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-04-06 15:12:06,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 15:12:06,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2022-04-06 15:12:06,901 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 56 [2022-04-06 15:12:06,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:06,902 INFO L478 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2022-04-06 15:12:06,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 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) [2022-04-06 15:12:06,902 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2022-04-06 15:12:06,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 15:12:06,903 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:06,903 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 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] [2022-04-06 15:12:06,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:07,129 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:07,129 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:07,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1051433450, now seen corresponding path program 1 times [2022-04-06 15:12:07,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:07,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [546076983] [2022-04-06 15:12:07,130 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:07,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1051433450, now seen corresponding path program 2 times [2022-04-06 15:12:07,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:07,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918356468] [2022-04-06 15:12:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:07,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:07,140 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:07,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684109216] [2022-04-06 15:12:07,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:07,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:07,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:07,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:07,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 15:12:07,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:12:07,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:07,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 15:12:07,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:07,307 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 15:12:07,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:07,443 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 15:12:07,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:07,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918356468] [2022-04-06 15:12:07,443 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:07,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684109216] [2022-04-06 15:12:07,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684109216] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:07,444 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:07,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 15:12:07,444 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:07,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [546076983] [2022-04-06 15:12:07,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [546076983] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:07,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:07,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:12:07,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267135877] [2022-04-06 15:12:07,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:07,445 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:12:07,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:07,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:12:07,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:12:07,445 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 15:12:07,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:07,612 INFO L93 Difference]: Finished difference Result 121 states and 167 transitions. [2022-04-06 15:12:07,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 15:12:07,613 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2022-04-06 15:12:07,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:07,616 INFO L225 Difference]: With dead ends: 121 [2022-04-06 15:12:07,616 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 15:12:07,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 15:12:07,618 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 30 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:07,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 243 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:12:07,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 15:12:07,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-04-06 15:12:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 58 states have internal predecessors, (64), 39 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 15:12:07,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2022-04-06 15:12:07,657 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 58 [2022-04-06 15:12:07,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:07,658 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2022-04-06 15:12:07,658 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-04-06 15:12:07,658 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2022-04-06 15:12:07,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 15:12:07,662 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:07,662 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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] [2022-04-06 15:12:07,690 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:07,875 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:07,876 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:07,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:07,876 INFO L85 PathProgramCache]: Analyzing trace with hash 998199389, now seen corresponding path program 1 times [2022-04-06 15:12:07,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:07,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [28416258] [2022-04-06 15:12:07,877 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:07,877 INFO L85 PathProgramCache]: Analyzing trace with hash 998199389, now seen corresponding path program 2 times [2022-04-06 15:12:07,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:07,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908690534] [2022-04-06 15:12:07,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:07,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:07,886 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:07,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544667582] [2022-04-06 15:12:07,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:07,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:07,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:07,892 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:07,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 15:12:07,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:12:07,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:07,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 15:12:07,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:08,141 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 12 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 15:12:08,142 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:08,298 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-04-06 15:12:08,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:08,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908690534] [2022-04-06 15:12:08,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:08,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544667582] [2022-04-06 15:12:08,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544667582] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:08,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:08,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-04-06 15:12:08,299 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:08,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [28416258] [2022-04-06 15:12:08,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [28416258] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:08,299 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:08,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 15:12:08,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179777995] [2022-04-06 15:12:08,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:08,300 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 15:12:08,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:08,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 15:12:08,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-04-06 15:12:08,300 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 15:12:08,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:08,471 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2022-04-06 15:12:08,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 15:12:08,472 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 64 [2022-04-06 15:12:08,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:08,475 INFO L225 Difference]: With dead ends: 147 [2022-04-06 15:12:08,475 INFO L226 Difference]: Without dead ends: 144 [2022-04-06 15:12:08,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:12:08,477 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:08,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 183 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:12:08,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-04-06 15:12:08,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2022-04-06 15:12:08,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 80 states have internal predecessors, (88), 58 states have call successors, (58), 10 states have call predecessors, (58), 9 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 15:12:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 201 transitions. [2022-04-06 15:12:08,513 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 201 transitions. Word has length 64 [2022-04-06 15:12:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:08,514 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 201 transitions. [2022-04-06 15:12:08,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 15:12:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 201 transitions. [2022-04-06 15:12:08,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 15:12:08,517 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:08,517 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 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] [2022-04-06 15:12:08,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:08,741 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 15:12:08,741 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:08,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1412509540, now seen corresponding path program 3 times [2022-04-06 15:12:08,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:08,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [898493053] [2022-04-06 15:12:08,742 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:08,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1412509540, now seen corresponding path program 4 times [2022-04-06 15:12:08,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:08,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355989143] [2022-04-06 15:12:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:08,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:08,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:08,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [218194181] [2022-04-06 15:12:08,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:12:08,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:08,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:08,762 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:08,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 15:12:08,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:12:08,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:08,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 15:12:08,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:09,321 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2022-04-06 15:12:09,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:09,585 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 15:12:09,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:09,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355989143] [2022-04-06 15:12:09,585 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:09,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218194181] [2022-04-06 15:12:09,585 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218194181] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:09,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:09,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2022-04-06 15:12:09,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:09,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [898493053] [2022-04-06 15:12:09,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [898493053] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:09,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:09,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 15:12:09,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514871805] [2022-04-06 15:12:09,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:09,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 15:12:09,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:09,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 15:12:09,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:12:09,588 INFO L87 Difference]: Start difference. First operand 141 states and 201 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 15:12:09,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:09,888 INFO L93 Difference]: Finished difference Result 153 states and 211 transitions. [2022-04-06 15:12:09,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:12:09,889 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 69 [2022-04-06 15:12:09,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:09,891 INFO L225 Difference]: With dead ends: 153 [2022-04-06 15:12:09,891 INFO L226 Difference]: Without dead ends: 151 [2022-04-06 15:12:09,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-04-06 15:12:09,892 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 30 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:09,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 215 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 15:12:09,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-04-06 15:12:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2022-04-06 15:12:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 86 states have internal predecessors, (94), 58 states have call successors, (58), 12 states have call predecessors, (58), 11 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 15:12:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2022-04-06 15:12:09,914 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 69 [2022-04-06 15:12:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:09,914 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2022-04-06 15:12:09,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 15:12:09,914 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2022-04-06 15:12:09,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 15:12:09,915 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:09,915 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 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] [2022-04-06 15:12:09,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:10,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 15:12:10,129 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:10,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:10,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1763593091, now seen corresponding path program 5 times [2022-04-06 15:12:10,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:10,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1975237370] [2022-04-06 15:12:10,129 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:10,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1763593091, now seen corresponding path program 6 times [2022-04-06 15:12:10,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:10,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857909009] [2022-04-06 15:12:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:10,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:10,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:10,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1728868134] [2022-04-06 15:12:10,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:12:10,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:10,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:10,139 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:10,142 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 15:12:10,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:12:10,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:10,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 48 conjunts are in the unsatisfiable core [2022-04-06 15:12:10,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2022-04-06 15:12:10,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:10,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:10,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857909009] [2022-04-06 15:12:10,714 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:10,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728868134] [2022-04-06 15:12:10,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728868134] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:12:10,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:12:10,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 15:12:10,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:10,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1975237370] [2022-04-06 15:12:10,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1975237370] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:10,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:10,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 15:12:10,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24924419] [2022-04-06 15:12:10,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:10,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 15:12:10,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:10,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 15:12:10,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2022-04-06 15:12:10,716 INFO L87 Difference]: Start difference. First operand 149 states and 207 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 15:12:11,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:11,135 INFO L93 Difference]: Finished difference Result 161 states and 217 transitions. [2022-04-06 15:12:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 15:12:11,135 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2022-04-06 15:12:11,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:11,137 INFO L225 Difference]: With dead ends: 161 [2022-04-06 15:12:11,137 INFO L226 Difference]: Without dead ends: 159 [2022-04-06 15:12:11,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:12:11,138 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 22 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:11,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 198 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 15:12:11,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-04-06 15:12:11,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2022-04-06 15:12:11,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 85 states have (on average 1.1764705882352942) internal successors, (100), 92 states have internal predecessors, (100), 58 states have call successors, (58), 14 states have call predecessors, (58), 13 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 15:12:11,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 213 transitions. [2022-04-06 15:12:11,162 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 213 transitions. Word has length 74 [2022-04-06 15:12:11,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:11,162 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 213 transitions. [2022-04-06 15:12:11,162 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 15:12:11,162 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 213 transitions. [2022-04-06 15:12:11,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-04-06 15:12:11,163 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:11,163 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 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] [2022-04-06 15:12:11,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:11,379 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-04-06 15:12:11,379 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:11,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1525288661, now seen corresponding path program 3 times [2022-04-06 15:12:11,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:11,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [423936506] [2022-04-06 15:12:11,380 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:11,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1525288661, now seen corresponding path program 4 times [2022-04-06 15:12:11,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:11,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833786821] [2022-04-06 15:12:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:11,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:11,389 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:11,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1156592460] [2022-04-06 15:12:11,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:12:11,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:11,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:11,391 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:11,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 15:12:11,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:12:11,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:11,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 15:12:11,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 15:12:11,762 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:11,951 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 35 proven. 10 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 15:12:11,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833786821] [2022-04-06 15:12:11,952 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:11,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156592460] [2022-04-06 15:12:11,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156592460] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:11,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:11,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 16 [2022-04-06 15:12:11,952 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:11,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [423936506] [2022-04-06 15:12:11,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [423936506] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:11,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:11,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 15:12:11,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701246168] [2022-04-06 15:12:11,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:11,953 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 15:12:11,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 15:12:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-04-06 15:12:11,954 INFO L87 Difference]: Start difference. First operand 157 states and 213 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 15:12:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:12,703 INFO L93 Difference]: Finished difference Result 179 states and 242 transitions. [2022-04-06 15:12:12,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 15:12:12,707 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 78 [2022-04-06 15:12:12,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:12,709 INFO L225 Difference]: With dead ends: 179 [2022-04-06 15:12:12,709 INFO L226 Difference]: Without dead ends: 177 [2022-04-06 15:12:12,709 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-04-06 15:12:12,710 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 38 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:12,710 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 197 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 15:12:12,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-04-06 15:12:12,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 171. [2022-04-06 15:12:12,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 93 states have (on average 1.1720430107526882) internal successors, (109), 100 states have internal predecessors, (109), 62 states have call successors, (62), 16 states have call predecessors, (62), 15 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2022-04-06 15:12:12,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 230 transitions. [2022-04-06 15:12:12,739 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 230 transitions. Word has length 78 [2022-04-06 15:12:12,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:12,740 INFO L478 AbstractCegarLoop]: Abstraction has 171 states and 230 transitions. [2022-04-06 15:12:12,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 15:12:12,740 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 230 transitions. [2022-04-06 15:12:12,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 15:12:12,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:12,740 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 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] [2022-04-06 15:12:12,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:12,941 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 15:12:12,941 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:12,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:12,941 INFO L85 PathProgramCache]: Analyzing trace with hash 815826741, now seen corresponding path program 1 times [2022-04-06 15:12:12,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:12,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2086207381] [2022-04-06 15:12:12,942 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:12,942 INFO L85 PathProgramCache]: Analyzing trace with hash 815826741, now seen corresponding path program 2 times [2022-04-06 15:12:12,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:12,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110194309] [2022-04-06 15:12:12,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:12,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:12,949 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:12,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1782486284] [2022-04-06 15:12:12,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:12,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:12,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:12,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:12,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 15:12:13,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:12:13,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 15:12:13,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:13,580 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 44 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 15:12:13,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 46 proven. 14 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2022-04-06 15:12:14,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110194309] [2022-04-06 15:12:14,586 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782486284] [2022-04-06 15:12:14,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782486284] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:14,586 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:14,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 15:12:14,586 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:14,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2086207381] [2022-04-06 15:12:14,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2086207381] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:14,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:14,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 15:12:14,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480360331] [2022-04-06 15:12:14,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:14,587 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 15:12:14,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:14,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 15:12:14,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-04-06 15:12:14,588 INFO L87 Difference]: Start difference. First operand 171 states and 230 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 15:12:15,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:15,143 INFO L93 Difference]: Finished difference Result 196 states and 266 transitions. [2022-04-06 15:12:15,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:12:15,145 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-04-06 15:12:15,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:15,146 INFO L225 Difference]: With dead ends: 196 [2022-04-06 15:12:15,146 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 15:12:15,147 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2022-04-06 15:12:15,147 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 27 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 509 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:15,148 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 241 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 509 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 15:12:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 15:12:15,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2022-04-06 15:12:15,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 104 states have (on average 1.1730769230769231) internal successors, (122), 112 states have internal predecessors, (122), 71 states have call successors, (71), 17 states have call predecessors, (71), 16 states have return successors, (68), 62 states have call predecessors, (68), 68 states have call successors, (68) [2022-04-06 15:12:15,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 261 transitions. [2022-04-06 15:12:15,175 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 261 transitions. Word has length 80 [2022-04-06 15:12:15,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:15,176 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 261 transitions. [2022-04-06 15:12:15,176 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 6 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 15:12:15,176 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 261 transitions. [2022-04-06 15:12:15,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-04-06 15:12:15,177 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:15,177 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:12:15,202 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:15,399 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 15:12:15,399 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:15,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:15,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1902002164, now seen corresponding path program 7 times [2022-04-06 15:12:15,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:15,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1849089052] [2022-04-06 15:12:15,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:15,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1902002164, now seen corresponding path program 8 times [2022-04-06 15:12:15,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:15,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517427743] [2022-04-06 15:12:15,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:15,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:15,411 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:15,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608599266] [2022-04-06 15:12:15,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:15,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:15,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:15,416 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:15,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 15:12:15,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:12:15,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:15,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 15:12:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-04-06 15:12:15,581 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 15:12:15,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:15,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517427743] [2022-04-06 15:12:15,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:15,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608599266] [2022-04-06 15:12:15,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608599266] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:15,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:15,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:12:15,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:15,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1849089052] [2022-04-06 15:12:15,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1849089052] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:15,582 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:15,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:12:15,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802348901] [2022-04-06 15:12:15,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:15,583 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:12:15,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:15,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:12:15,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 15:12:15,583 INFO L87 Difference]: Start difference. First operand 192 states and 261 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 15:12:15,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:15,666 INFO L93 Difference]: Finished difference Result 234 states and 319 transitions. [2022-04-06 15:12:15,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 15:12:15,666 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2022-04-06 15:12:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:15,668 INFO L225 Difference]: With dead ends: 234 [2022-04-06 15:12:15,668 INFO L226 Difference]: Without dead ends: 175 [2022-04-06 15:12:15,668 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 15:12:15,669 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:15,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 143 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 15:12:15,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-04-06 15:12:15,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 166. [2022-04-06 15:12:15,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 91 states have (on average 1.10989010989011) internal successors, (101), 98 states have internal predecessors, (101), 58 states have call successors, (58), 17 states have call predecessors, (58), 16 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 15:12:15,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 214 transitions. [2022-04-06 15:12:15,693 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 214 transitions. Word has length 89 [2022-04-06 15:12:15,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:15,693 INFO L478 AbstractCegarLoop]: Abstraction has 166 states and 214 transitions. [2022-04-06 15:12:15,694 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-04-06 15:12:15,694 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 214 transitions. [2022-04-06 15:12:15,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-06 15:12:15,694 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:15,695 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 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] [2022-04-06 15:12:15,717 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:15,907 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 15:12:15,907 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:15,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1738688612, now seen corresponding path program 1 times [2022-04-06 15:12:15,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:15,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1679658446] [2022-04-06 15:12:15,908 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:15,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1738688612, now seen corresponding path program 2 times [2022-04-06 15:12:15,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:15,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775072805] [2022-04-06 15:12:15,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:15,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:15,915 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:15,916 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [931933806] [2022-04-06 15:12:15,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:12:15,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:15,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:15,918 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:15,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 15:12:15,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:12:15,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:15,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 61 conjunts are in the unsatisfiable core [2022-04-06 15:12:15,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 96 proven. 28 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2022-04-06 15:12:16,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:30,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775072805] [2022-04-06 15:12:30,718 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931933806] [2022-04-06 15:12:30,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931933806] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:12:30,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:12:30,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 15:12:30,718 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:30,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1679658446] [2022-04-06 15:12:30,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1679658446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:30,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:30,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 15:12:30,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426823296] [2022-04-06 15:12:30,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:30,719 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 15:12:30,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 15:12:30,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=233, Unknown=5, NotChecked=0, Total=306 [2022-04-06 15:12:30,720 INFO L87 Difference]: Start difference. First operand 166 states and 214 transitions. Second operand has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 15:12:33,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:33,536 INFO L93 Difference]: Finished difference Result 181 states and 226 transitions. [2022-04-06 15:12:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 15:12:33,537 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 96 [2022-04-06 15:12:33,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:33,538 INFO L225 Difference]: With dead ends: 181 [2022-04-06 15:12:33,538 INFO L226 Difference]: Without dead ends: 179 [2022-04-06 15:12:33,538 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=108, Invalid=392, Unknown=6, NotChecked=0, Total=506 [2022-04-06 15:12:33,539 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 26 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:33,539 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 255 Invalid, 611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 15:12:33,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-04-06 15:12:33,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-04-06 15:12:33,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 100 states have (on average 1.1) internal successors, (110), 107 states have internal predecessors, (110), 58 states have call successors, (58), 20 states have call predecessors, (58), 19 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 15:12:33,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 223 transitions. [2022-04-06 15:12:33,563 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 223 transitions. Word has length 96 [2022-04-06 15:12:33,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:33,564 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 223 transitions. [2022-04-06 15:12:33,564 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 15:12:33,564 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 223 transitions. [2022-04-06 15:12:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 15:12:33,565 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:33,565 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:12:33,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:33,771 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:33,771 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:33,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1265808182, now seen corresponding path program 5 times [2022-04-06 15:12:33,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:33,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2062258871] [2022-04-06 15:12:33,772 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:33,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1265808182, now seen corresponding path program 6 times [2022-04-06 15:12:33,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:33,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127304794] [2022-04-06 15:12:33,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:33,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:33,780 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:33,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1016122920] [2022-04-06 15:12:33,780 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:12:33,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:33,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:33,781 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:33,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 15:12:33,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-04-06 15:12:33,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:33,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 15:12:33,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:34,088 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 15:12:34,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:34,255 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 24 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 15:12:34,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:34,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127304794] [2022-04-06 15:12:34,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:34,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016122920] [2022-04-06 15:12:34,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016122920] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 15:12:34,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:12:34,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 9 [2022-04-06 15:12:34,256 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:34,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2062258871] [2022-04-06 15:12:34,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2062258871] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:34,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:34,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 15:12:34,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407805596] [2022-04-06 15:12:34,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:34,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 15:12:34,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:34,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 15:12:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 15:12:34,257 INFO L87 Difference]: Start difference. First operand 178 states and 223 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) [2022-04-06 15:12:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:34,314 INFO L93 Difference]: Finished difference Result 184 states and 228 transitions. [2022-04-06 15:12:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 15:12:34,315 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 100 [2022-04-06 15:12:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:34,316 INFO L225 Difference]: With dead ends: 184 [2022-04-06 15:12:34,316 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 15:12:34,316 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 188 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 15:12:34,317 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:34,318 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 117 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 15:12:34,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 15:12:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-04-06 15:12:34,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 110 states have internal predecessors, (113), 58 states have call successors, (58), 21 states have call predecessors, (58), 20 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 15:12:34,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 226 transitions. [2022-04-06 15:12:34,353 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 226 transitions. Word has length 100 [2022-04-06 15:12:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:34,355 INFO L478 AbstractCegarLoop]: Abstraction has 182 states and 226 transitions. [2022-04-06 15:12:34,355 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) [2022-04-06 15:12:34,355 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 226 transitions. [2022-04-06 15:12:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 15:12:34,356 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:34,356 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 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] [2022-04-06 15:12:34,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:34,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-04-06 15:12:34,571 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:34,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:34,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1068463892, now seen corresponding path program 3 times [2022-04-06 15:12:34,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:34,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1713692409] [2022-04-06 15:12:34,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:34,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1068463892, now seen corresponding path program 4 times [2022-04-06 15:12:34,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:34,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058216523] [2022-04-06 15:12:34,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:34,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:34,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:34,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [357969467] [2022-04-06 15:12:34,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:12:34,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:34,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:34,586 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:34,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 15:12:34,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:12:34,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:34,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 47 conjunts are in the unsatisfiable core [2022-04-06 15:12:34,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:35,052 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:12:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 55 proven. 49 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-04-06 15:12:35,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:35,949 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:12:35,955 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:12:38,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:38,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058216523] [2022-04-06 15:12:38,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:38,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357969467] [2022-04-06 15:12:38,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357969467] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:12:38,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:12:38,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 15:12:38,092 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:38,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1713692409] [2022-04-06 15:12:38,092 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1713692409] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:38,092 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:38,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 15:12:38,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818367923] [2022-04-06 15:12:38,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:38,093 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 15:12:38,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:38,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 15:12:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=308, Unknown=1, NotChecked=0, Total=380 [2022-04-06 15:12:38,093 INFO L87 Difference]: Start difference. First operand 182 states and 226 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 15:12:39,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:39,100 INFO L93 Difference]: Finished difference Result 211 states and 269 transitions. [2022-04-06 15:12:39,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:12:39,101 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) Word has length 102 [2022-04-06 15:12:39,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:39,102 INFO L225 Difference]: With dead ends: 211 [2022-04-06 15:12:39,102 INFO L226 Difference]: Without dead ends: 208 [2022-04-06 15:12:39,103 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=99, Invalid=452, Unknown=1, NotChecked=0, Total=552 [2022-04-06 15:12:39,103 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 30 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:39,103 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 270 Invalid, 684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 15:12:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-04-06 15:12:39,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2022-04-06 15:12:39,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 115 states have (on average 1.1043478260869566) internal successors, (127), 122 states have internal predecessors, (127), 70 states have call successors, (70), 22 states have call predecessors, (70), 21 states have return successors, (67), 62 states have call predecessors, (67), 67 states have call successors, (67) [2022-04-06 15:12:39,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 264 transitions. [2022-04-06 15:12:39,138 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 264 transitions. Word has length 102 [2022-04-06 15:12:39,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:39,138 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 264 transitions. [2022-04-06 15:12:39,138 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 5 states have call predecessors, (17), 7 states have call successors, (17) [2022-04-06 15:12:39,138 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 264 transitions. [2022-04-06 15:12:39,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 15:12:39,139 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:39,139 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 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] [2022-04-06 15:12:39,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:39,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 15:12:39,363 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:39,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:39,364 INFO L85 PathProgramCache]: Analyzing trace with hash 351496396, now seen corresponding path program 5 times [2022-04-06 15:12:39,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:39,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1344666389] [2022-04-06 15:12:39,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:39,365 INFO L85 PathProgramCache]: Analyzing trace with hash 351496396, now seen corresponding path program 6 times [2022-04-06 15:12:39,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:39,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809953044] [2022-04-06 15:12:39,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:39,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:39,379 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:39,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311975897] [2022-04-06 15:12:39,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:12:39,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:39,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:39,381 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:39,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 15:12:39,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:12:39,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:39,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 15:12:39,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:39,576 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 15:12:39,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:39,729 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-04-06 15:12:39,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:39,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809953044] [2022-04-06 15:12:39,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:39,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311975897] [2022-04-06 15:12:39,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311975897] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:39,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:39,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2022-04-06 15:12:39,732 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:39,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1344666389] [2022-04-06 15:12:39,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1344666389] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:39,732 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:39,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 15:12:39,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615211634] [2022-04-06 15:12:39,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:39,732 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 15:12:39,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:39,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 15:12:39,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-04-06 15:12:39,733 INFO L87 Difference]: Start difference. First operand 207 states and 264 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-04-06 15:12:40,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:40,157 INFO L93 Difference]: Finished difference Result 257 states and 349 transitions. [2022-04-06 15:12:40,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 15:12:40,158 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2022-04-06 15:12:40,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:40,159 INFO L225 Difference]: With dead ends: 257 [2022-04-06 15:12:40,159 INFO L226 Difference]: Without dead ends: 249 [2022-04-06 15:12:40,160 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 205 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-04-06 15:12:40,160 INFO L913 BasicCegarLoop]: 80 mSDtfsCounter, 14 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:40,160 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 250 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 15:12:40,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-04-06 15:12:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 230. [2022-04-06 15:12:40,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 125 states have internal predecessors, (140), 85 states have call successors, (85), 22 states have call predecessors, (85), 21 states have return successors, (82), 82 states have call predecessors, (82), 82 states have call successors, (82) [2022-04-06 15:12:40,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 307 transitions. [2022-04-06 15:12:40,199 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 307 transitions. Word has length 105 [2022-04-06 15:12:40,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:40,199 INFO L478 AbstractCegarLoop]: Abstraction has 230 states and 307 transitions. [2022-04-06 15:12:40,199 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2022-04-06 15:12:40,199 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 307 transitions. [2022-04-06 15:12:40,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 15:12:40,200 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:40,200 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:12:40,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:40,415 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 15:12:40,416 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:40,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2080181613, now seen corresponding path program 3 times [2022-04-06 15:12:40,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:40,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [852933261] [2022-04-06 15:12:40,416 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:40,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2080181613, now seen corresponding path program 4 times [2022-04-06 15:12:40,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:40,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119597193] [2022-04-06 15:12:40,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:40,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:40,422 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:40,423 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1453797070] [2022-04-06 15:12:40,423 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:12:40,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:40,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:40,424 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:40,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 15:12:40,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:12:40,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:40,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 15:12:40,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:41,857 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 55 proven. 50 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2022-04-06 15:12:41,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:12:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 73 proven. 7 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 15:12:42,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:12:42,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119597193] [2022-04-06 15:12:42,704 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:12:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453797070] [2022-04-06 15:12:42,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453797070] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:12:42,705 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:12:42,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 9] total 22 [2022-04-06 15:12:42,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:12:42,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [852933261] [2022-04-06 15:12:42,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [852933261] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:12:42,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:12:42,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 15:12:42,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624541133] [2022-04-06 15:12:42,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:12:42,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 15:12:42,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:42,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 15:12:42,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-04-06 15:12:42,706 INFO L87 Difference]: Start difference. First operand 230 states and 307 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 15:12:47,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:12:47,428 INFO L93 Difference]: Finished difference Result 260 states and 350 transitions. [2022-04-06 15:12:47,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 15:12:47,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 111 [2022-04-06 15:12:47,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:12:47,433 INFO L225 Difference]: With dead ends: 260 [2022-04-06 15:12:47,433 INFO L226 Difference]: Without dead ends: 258 [2022-04-06 15:12:47,434 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2022-04-06 15:12:47,435 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 42 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 15:12:47,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 317 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 15:12:47,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-04-06 15:12:47,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2022-04-06 15:12:47,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 135 states have (on average 1.1407407407407408) internal successors, (154), 137 states have internal predecessors, (154), 97 states have call successors, (97), 23 states have call predecessors, (97), 22 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-04-06 15:12:47,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 345 transitions. [2022-04-06 15:12:47,481 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 345 transitions. Word has length 111 [2022-04-06 15:12:47,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:12:47,481 INFO L478 AbstractCegarLoop]: Abstraction has 255 states and 345 transitions. [2022-04-06 15:12:47,481 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 15:12:47,481 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 345 transitions. [2022-04-06 15:12:47,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-04-06 15:12:47,483 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:12:47,483 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:12:47,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 15:12:47,704 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:47,704 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:12:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:12:47,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1295483154, now seen corresponding path program 5 times [2022-04-06 15:12:47,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:12:47,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1262050583] [2022-04-06 15:12:47,705 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:12:47,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1295483154, now seen corresponding path program 6 times [2022-04-06 15:12:47,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:12:47,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331125635] [2022-04-06 15:12:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:12:47,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:12:47,712 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:12:47,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [900051357] [2022-04-06 15:12:47,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 15:12:47,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:12:47,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:12:47,713 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:12:47,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 15:12:47,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 15:12:47,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:12:47,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 15:12:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:12:49,489 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 129 proven. 56 refuted. 0 times theorem prover too weak. 268 trivial. 0 not checked. [2022-04-06 15:12:49,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:14:52,127 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~yy~0_BEFORE_CALL_39 Int) (v_main_~x~0_BEFORE_CALL_151 Int) (v_main_~y~0_BEFORE_CALL_157 Int) (v_main_~s~0_BEFORE_CALL_123 Int) (v_main_~q~0_BEFORE_CALL_120 Int) (v_main_~xy~0_BEFORE_CALL_29 Int)) (let ((.cse0 (* v_main_~y~0_BEFORE_CALL_157 (+ (* v_main_~y~0_BEFORE_CALL_157 v_main_~s~0_BEFORE_CALL_123) (* v_main_~x~0_BEFORE_CALL_151 v_main_~q~0_BEFORE_CALL_120))))) (let ((.cse1 (+ .cse0 (* (- 1) v_main_~yy~0_BEFORE_CALL_39 v_main_~s~0_BEFORE_CALL_123)))) (or (not (= (+ (* (- 1) .cse0) (* v_main_~yy~0_BEFORE_CALL_39 v_main_~s~0_BEFORE_CALL_123) (* v_main_~xy~0_BEFORE_CALL_29 v_main_~q~0_BEFORE_CALL_120)) 0)) (= (mod .cse1 v_main_~q~0_BEFORE_CALL_120) 0) (= .cse1 0))))) (not (= |c___VERIFIER_assert_#in~cond| 1))) is different from true [2022-04-06 15:14:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 137 proven. 38 refuted. 5 times theorem prover too weak. 272 trivial. 1 not checked. [2022-04-06 15:14:53,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:14:53,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331125635] [2022-04-06 15:14:53,681 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:14:53,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900051357] [2022-04-06 15:14:53,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900051357] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:14:53,682 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:14:53,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2022-04-06 15:14:53,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:14:53,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1262050583] [2022-04-06 15:14:53,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1262050583] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:14:53,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:14:53,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 15:14:53,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976309443] [2022-04-06 15:14:53,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:14:53,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 15:14:53,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:14:53,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 15:14:53,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=642, Unknown=8, NotChecked=52, Total=812 [2022-04-06 15:14:53,684 INFO L87 Difference]: Start difference. First operand 255 states and 345 transitions. Second operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 15:15:07,346 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 [] [2022-04-06 15:15:09,359 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 [] [2022-04-06 15:15:10,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:15:10,801 INFO L93 Difference]: Finished difference Result 280 states and 365 transitions. [2022-04-06 15:15:10,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 15:15:10,802 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) Word has length 116 [2022-04-06 15:15:10,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:15:10,804 INFO L225 Difference]: With dead ends: 280 [2022-04-06 15:15:10,804 INFO L226 Difference]: Without dead ends: 278 [2022-04-06 15:15:10,806 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 202 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 32.4s TimeCoverageRelationStatistics Valid=186, Invalid=1138, Unknown=12, NotChecked=70, Total=1406 [2022-04-06 15:15:10,806 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 36 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 48 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:15:10,807 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 343 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 956 Invalid, 2 Unknown, 0 Unchecked, 8.3s Time] [2022-04-06 15:15:10,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-04-06 15:15:10,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 275. [2022-04-06 15:15:10,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 150 states have (on average 1.1266666666666667) internal successors, (169), 152 states have internal predecessors, (169), 97 states have call successors, (97), 28 states have call predecessors, (97), 27 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-04-06 15:15:10,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 360 transitions. [2022-04-06 15:15:10,854 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 360 transitions. Word has length 116 [2022-04-06 15:15:10,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:15:10,854 INFO L478 AbstractCegarLoop]: Abstraction has 275 states and 360 transitions. [2022-04-06 15:15:10,854 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 14 states have internal predecessors, (31), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 9 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 15:15:10,854 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 360 transitions. [2022-04-06 15:15:10,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 15:15:10,855 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:15:10,855 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 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] [2022-04-06 15:15:10,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 15:15:11,069 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:15:11,069 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:15:11,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:15:11,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1515779717, now seen corresponding path program 7 times [2022-04-06 15:15:11,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:11,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1908688422] [2022-04-06 15:15:11,070 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:15:11,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1515779717, now seen corresponding path program 8 times [2022-04-06 15:15:11,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:15:11,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008990839] [2022-04-06 15:15:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:15:11,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:15:11,078 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:15:11,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1535996571] [2022-04-06 15:15:11,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:15:11,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:15:11,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:15:11,089 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:15:11,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 15:15:11,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:15:11,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:15:11,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 82 conjunts are in the unsatisfiable core [2022-04-06 15:15:11,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:15:13,326 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 153 proven. 83 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2022-04-06 15:15:13,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:15:14,390 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:15:15,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:15:15,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008990839] [2022-04-06 15:15:15,336 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:15:15,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535996571] [2022-04-06 15:15:15,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535996571] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:15:15,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:15:15,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2022-04-06 15:15:15,337 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:15:15,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1908688422] [2022-04-06 15:15:15,337 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1908688422] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:15:15,337 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:15:15,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 15:15:15,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018283565] [2022-04-06 15:15:15,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:15:15,337 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 15:15:15,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:15,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 15:15:15,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-04-06 15:15:15,338 INFO L87 Difference]: Start difference. First operand 275 states and 360 transitions. Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-04-06 15:15:16,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:15:16,956 INFO L93 Difference]: Finished difference Result 287 states and 370 transitions. [2022-04-06 15:15:16,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 15:15:16,957 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) Word has length 118 [2022-04-06 15:15:16,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:15:16,958 INFO L225 Difference]: With dead ends: 287 [2022-04-06 15:15:16,958 INFO L226 Difference]: Without dead ends: 285 [2022-04-06 15:15:16,959 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2022-04-06 15:15:16,959 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 44 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 15:15:16,959 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 229 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 15:15:16,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-04-06 15:15:16,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 283. [2022-04-06 15:15:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 156 states have (on average 1.1217948717948718) internal successors, (175), 158 states have internal predecessors, (175), 97 states have call successors, (97), 30 states have call predecessors, (97), 29 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-04-06 15:15:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 366 transitions. [2022-04-06 15:15:16,998 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 366 transitions. Word has length 118 [2022-04-06 15:15:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:15:16,998 INFO L478 AbstractCegarLoop]: Abstraction has 283 states and 366 transitions. [2022-04-06 15:15:16,998 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 9 states have call predecessors, (20), 8 states have call successors, (20) [2022-04-06 15:15:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 366 transitions. [2022-04-06 15:15:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 15:15:16,999 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:15:17,000 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 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] [2022-04-06 15:15:17,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 15:15:17,215 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 15:15:17,215 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:15:17,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:15:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2030078771, now seen corresponding path program 9 times [2022-04-06 15:15:17,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:17,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [156188105] [2022-04-06 15:15:17,216 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:15:17,216 INFO L85 PathProgramCache]: Analyzing trace with hash 2030078771, now seen corresponding path program 10 times [2022-04-06 15:15:17,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:15:17,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922861655] [2022-04-06 15:15:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:15:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:15:17,224 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:15:17,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [915881542] [2022-04-06 15:15:17,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:15:17,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:15:17,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:15:17,225 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:15:17,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 15:15:17,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:15:17,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:15:17,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 76 conjunts are in the unsatisfiable core [2022-04-06 15:15:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:15:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 109 proven. 111 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2022-04-06 15:15:18,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:15:19,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:15:19,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922861655] [2022-04-06 15:15:19,676 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:15:19,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915881542] [2022-04-06 15:15:19,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915881542] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 15:15:19,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 15:15:19,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 15:15:19,677 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:15:19,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [156188105] [2022-04-06 15:15:19,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [156188105] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:15:19,677 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:15:19,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 15:15:19,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280569412] [2022-04-06 15:15:19,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:15:19,677 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 15:15:19,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:19,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 15:15:19,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-04-06 15:15:19,678 INFO L87 Difference]: Start difference. First operand 283 states and 366 transitions. Second operand has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-04-06 15:15:20,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:15:20,824 INFO L93 Difference]: Finished difference Result 300 states and 380 transitions. [2022-04-06 15:15:20,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 15:15:20,826 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) Word has length 121 [2022-04-06 15:15:20,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:15:20,827 INFO L225 Difference]: With dead ends: 300 [2022-04-06 15:15:20,827 INFO L226 Difference]: Without dead ends: 298 [2022-04-06 15:15:20,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 124 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-04-06 15:15:20,828 INFO L913 BasicCegarLoop]: 51 mSDtfsCounter, 31 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 812 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 15:15:20,828 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 289 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 812 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 15:15:20,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-04-06 15:15:20,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 295. [2022-04-06 15:15:20,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 165 states have (on average 1.1151515151515152) internal successors, (184), 167 states have internal predecessors, (184), 97 states have call successors, (97), 33 states have call predecessors, (97), 32 states have return successors, (94), 94 states have call predecessors, (94), 94 states have call successors, (94) [2022-04-06 15:15:20,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 375 transitions. [2022-04-06 15:15:20,879 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 375 transitions. Word has length 121 [2022-04-06 15:15:20,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:15:20,879 INFO L478 AbstractCegarLoop]: Abstraction has 295 states and 375 transitions. [2022-04-06 15:15:20,880 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 10 states have call predecessors, (20), 8 states have call successors, (20) [2022-04-06 15:15:20,880 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 375 transitions. [2022-04-06 15:15:20,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 15:15:20,881 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:15:20,881 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 15:15:20,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 15:15:21,093 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 15:15:21,093 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:15:21,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:15:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1602594227, now seen corresponding path program 7 times [2022-04-06 15:15:21,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:21,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2082310088] [2022-04-06 15:15:21,094 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:15:21,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1602594227, now seen corresponding path program 8 times [2022-04-06 15:15:21,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:15:21,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043784441] [2022-04-06 15:15:21,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:15:21,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:15:21,100 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:15:21,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1247824737] [2022-04-06 15:15:21,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 15:15:21,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:15:21,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:15:21,101 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:15:21,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 15:15:21,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 15:15:21,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:15:21,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2022-04-06 15:15:21,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:15:22,864 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 67 proven. 57 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2022-04-06 15:15:22,865 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 15:15:23,733 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:15:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 67 proven. 42 refuted. 6 times theorem prover too weak. 459 trivial. 0 not checked. [2022-04-06 15:15:33,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 15:15:33,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043784441] [2022-04-06 15:15:33,723 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 15:15:33,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247824737] [2022-04-06 15:15:33,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247824737] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 15:15:33,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 15:15:33,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 28 [2022-04-06 15:15:33,724 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 15:15:33,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2082310088] [2022-04-06 15:15:33,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2082310088] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 15:15:33,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 15:15:33,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 15:15:33,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986811497] [2022-04-06 15:15:33,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 15:15:33,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 15:15:33,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 15:15:33,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=636, Unknown=4, NotChecked=0, Total=756 [2022-04-06 15:15:33,725 INFO L87 Difference]: Start difference. First operand 295 states and 375 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 15:15:35,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 15:15:35,373 INFO L93 Difference]: Finished difference Result 331 states and 430 transitions. [2022-04-06 15:15:35,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 15:15:35,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) Word has length 124 [2022-04-06 15:15:35,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 15:15:35,375 INFO L225 Difference]: With dead ends: 331 [2022-04-06 15:15:35,375 INFO L226 Difference]: Without dead ends: 328 [2022-04-06 15:15:35,376 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=176, Invalid=942, Unknown=4, NotChecked=0, Total=1122 [2022-04-06 15:15:35,376 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 49 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 848 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 848 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 15:15:35,376 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 214 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 848 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 15:15:35,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-04-06 15:15:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 326. [2022-04-06 15:15:35,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 179 states have (on average 1.1229050279329609) internal successors, (201), 181 states have internal predecessors, (201), 113 states have call successors, (113), 34 states have call predecessors, (113), 33 states have return successors, (110), 110 states have call predecessors, (110), 110 states have call successors, (110) [2022-04-06 15:15:35,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 424 transitions. [2022-04-06 15:15:35,439 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 424 transitions. Word has length 124 [2022-04-06 15:15:35,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 15:15:35,439 INFO L478 AbstractCegarLoop]: Abstraction has 326 states and 424 transitions. [2022-04-06 15:15:35,439 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 7 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 15:15:35,440 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 424 transitions. [2022-04-06 15:15:35,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 15:15:35,440 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 15:15:35,441 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 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] [2022-04-06 15:15:35,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 15:15:35,662 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:15:35,662 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 15:15:35,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 15:15:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1787495061, now seen corresponding path program 9 times [2022-04-06 15:15:35,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 15:15:35,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2046210141] [2022-04-06 15:15:35,663 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 15:15:35,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1787495061, now seen corresponding path program 10 times [2022-04-06 15:15:35,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 15:15:35,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212317079] [2022-04-06 15:15:35,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 15:15:35,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 15:15:35,670 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 15:15:35,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241435866] [2022-04-06 15:15:35,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 15:15:35,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 15:15:35,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 15:15:35,671 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 15:15:35,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 15:15:35,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 15:15:35,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 15:15:35,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 15:15:35,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 15:15:38,239 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:15:38,409 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:15:39,011 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:15:39,017 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:15:39,022 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:15:39,025 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:15:39,030 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:15:39,032 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 15:15:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 579 backedges. 165 proven. 84 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-04-06 15:15:41,027 INFO L328 TraceCheckSpWp]: Computing backward predicates...