/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-18 14:31:18,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-18 14:31:18,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-18 14:31:18,343 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-18 14:31:18,356 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-18 14:31:18,357 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-18 14:31:18,357 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-18 14:31:18,358 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-18 14:31:18,358 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-18 14:31:18,359 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-18 14:31:18,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-18 14:31:18,361 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-18 14:31:18,362 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-18 14:31:18,368 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-18 14:31:18,371 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-18 14:31:18,372 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-18 14:31:18,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-18 14:31:18,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-18 14:31:18,382 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-18 14:31:18,383 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-18 14:31:18,386 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-18 14:31:18,387 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-18 14:31:18,401 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-18 14:31:18,401 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-18 14:31:18,402 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-18 14:31:18,402 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-18 14:31:18,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-18 14:31:18,402 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-18 14:31:18,403 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-18 14:31:18,403 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-18 14:31:18,403 INFO L138 SettingsManager]: * Use SBE=true [2022-03-18 14:31:18,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-18 14:31:18,403 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-18 14:31:18,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-18 14:31:18,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-18 14:31:18,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-18 14:31:18,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-18 14:31:18,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-18 14:31:18,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-18 14:31:18,404 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-18 14:31:18,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-18 14:31:18,404 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-18 14:31:18,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-18 14:31:18,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-18 14:31:18,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-18 14:31:18,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-18 14:31:18,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 14:31:18,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-18 14:31:18,405 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-18 14:31:18,405 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-18 14:31:18,405 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-18 14:31:18,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-18 14:31:18,406 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-18 14:31:18,406 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-18 14:31:18,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-18 14:31:18,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-18 14:31:18,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-18 14:31:18,574 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-18 14:31:18,576 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-18 14:31:18,577 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-18 14:31:18,578 INFO L275 PluginConnector]: CDTParser initialized [2022-03-18 14:31:18,579 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-03-18 14:31:18,620 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44d06bff6/b7646133b3004912a4cb8de2ce561405/FLAGdc3990a44 [2022-03-18 14:31:18,981 INFO L306 CDTParser]: Found 1 translation units. [2022-03-18 14:31:18,981 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c [2022-03-18 14:31:18,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44d06bff6/b7646133b3004912a4cb8de2ce561405/FLAGdc3990a44 [2022-03-18 14:31:19,007 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44d06bff6/b7646133b3004912a4cb8de2ce561405 [2022-03-18 14:31:19,010 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-18 14:31:19,011 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-18 14:31:19,012 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-18 14:31:19,012 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-18 14:31:19,015 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-18 14:31:19,015 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:31:19" (1/1) ... [2022-03-18 14:31:19,017 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f000c27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19, skipping insertion in model container [2022-03-18 14:31:19,017 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.03 02:31:19" (1/1) ... [2022-03-18 14:31:19,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-18 14:31:19,035 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-18 14:31:19,155 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2022-03-18 14:31:19,168 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 14:31:19,173 INFO L203 MainTranslator]: Completed pre-run [2022-03-18 14:31:19,180 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound100.c[524,537] [2022-03-18 14:31:19,184 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-18 14:31:19,191 INFO L208 MainTranslator]: Completed translation [2022-03-18 14:31:19,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19 WrapperNode [2022-03-18 14:31:19,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-18 14:31:19,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-18 14:31:19,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-18 14:31:19,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-18 14:31:19,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19" (1/1) ... [2022-03-18 14:31:19,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19" (1/1) ... [2022-03-18 14:31:19,204 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19" (1/1) ... [2022-03-18 14:31:19,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19" (1/1) ... [2022-03-18 14:31:19,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19" (1/1) ... [2022-03-18 14:31:19,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19" (1/1) ... [2022-03-18 14:31:19,209 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19" (1/1) ... [2022-03-18 14:31:19,210 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-18 14:31:19,211 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-18 14:31:19,211 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-18 14:31:19,211 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-18 14:31:19,213 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19" (1/1) ... [2022-03-18 14:31:19,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-18 14:31:19,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:19,234 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-18 14:31:19,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-18 14:31:19,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-18 14:31:19,266 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-18 14:31:19,267 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-18 14:31:19,267 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-18 14:31:19,268 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-18 14:31:19,268 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-18 14:31:19,268 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-18 14:31:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-18 14:31:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-18 14:31:19,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-18 14:31:19,309 INFO L234 CfgBuilder]: Building ICFG [2022-03-18 14:31:19,310 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-18 14:31:19,389 INFO L275 CfgBuilder]: Performing block encoding [2022-03-18 14:31:19,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-18 14:31:19,393 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-18 14:31:19,394 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:31:19 BoogieIcfgContainer [2022-03-18 14:31:19,395 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-18 14:31:19,396 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-18 14:31:19,396 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-18 14:31:19,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-18 14:31:19,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.03 02:31:19" (1/3) ... [2022-03-18 14:31:19,410 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106c9178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:31:19, skipping insertion in model container [2022-03-18 14:31:19,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.03 02:31:19" (2/3) ... [2022-03-18 14:31:19,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@106c9178 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.03 02:31:19, skipping insertion in model container [2022-03-18 14:31:19,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.03 02:31:19" (3/3) ... [2022-03-18 14:31:19,412 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound100.c [2022-03-18 14:31:19,415 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-18 14:31:19,415 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-18 14:31:19,458 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-18 14:31:19,465 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-18 14:31:19,465 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-18 14:31:19,475 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-03-18 14:31:19,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-18 14:31:19,478 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:31:19,478 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:31:19,479 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:31:19,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:31:19,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2022-03-18 14:31:19,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:31:19,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226330712] [2022-03-18 14:31:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:19,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:31:19,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:31:19,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936126272] [2022-03-18 14:31:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:19,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:19,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:19,550 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:31:19,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-18 14:31:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:31:19,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-03-18 14:31:19,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:31:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-03-18 14:31:19,704 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:31:19,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:31:19,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226330712] [2022-03-18 14:31:19,705 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:31:19,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936126272] [2022-03-18 14:31:19,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936126272] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:31:19,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:31:19,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-03-18 14:31:19,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126183368] [2022-03-18 14:31:19,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:31:19,710 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-03-18 14:31:19,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:31:19,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-03-18 14:31:19,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-18 14:31:19,737 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 14:31:19,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:31:19,754 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2022-03-18 14:31:19,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-03-18 14:31:19,755 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-18 14:31:19,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:31:19,768 INFO L225 Difference]: With dead ends: 53 [2022-03-18 14:31:19,768 INFO L226 Difference]: Without dead ends: 25 [2022-03-18 14:31:19,771 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-03-18 14:31:19,777 INFO L912 BasicCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:31:19,778 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:31:19,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-18 14:31:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-18 14:31:19,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 14:31:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-03-18 14:31:19,815 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2022-03-18 14:31:19,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:31:19,816 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-03-18 14:31:19,816 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 14:31:19,816 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-03-18 14:31:19,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 14:31:19,818 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:31:19,819 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:31:19,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-18 14:31:20,035 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-03-18 14:31:20,035 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:31:20,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:31:20,036 INFO L85 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2022-03-18 14:31:20,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:31:20,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304502073] [2022-03-18 14:31:20,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:20,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:31:20,053 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:31:20,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1280827464] [2022-03-18 14:31:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:20,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:20,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:20,061 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:31:20,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-18 14:31:20,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:31:20,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2022-03-18 14:31:20,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:31:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:31:20,227 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:31:20,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:31:20,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304502073] [2022-03-18 14:31:20,228 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:31:20,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280827464] [2022-03-18 14:31:20,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280827464] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:31:20,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:31:20,229 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-18 14:31:20,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516507723] [2022-03-18 14:31:20,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:31:20,234 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-18 14:31:20,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:31:20,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-18 14:31:20,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 14:31:20,239 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 14:31:20,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:31:20,255 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-03-18 14:31:20,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-18 14:31:20,256 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2022-03-18 14:31:20,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:31:20,257 INFO L225 Difference]: With dead ends: 34 [2022-03-18 14:31:20,257 INFO L226 Difference]: Without dead ends: 27 [2022-03-18 14:31:20,258 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-18 14:31:20,259 INFO L912 BasicCegarLoop]: 27 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:31:20,259 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 67 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:31:20,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-18 14:31:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-18 14:31:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 14:31:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-03-18 14:31:20,270 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2022-03-18 14:31:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:31:20,271 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-03-18 14:31:20,271 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-18 14:31:20,272 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-03-18 14:31:20,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-03-18 14:31:20,273 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:31:20,273 INFO L500 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:31:20,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-18 14:31:20,483 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,SelfDestructingSolverStorable1 [2022-03-18 14:31:20,484 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:31:20,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:31:20,484 INFO L85 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2022-03-18 14:31:20,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:31:20,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384050189] [2022-03-18 14:31:20,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:20,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:31:20,493 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:31:20,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [801346923] [2022-03-18 14:31:20,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:20,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:20,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:20,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:31:20,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-18 14:31:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:31:20,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 14:31:20,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:31:20,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:31:20,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-18 14:31:20,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:31:20,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384050189] [2022-03-18 14:31:20,842 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:31:20,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801346923] [2022-03-18 14:31:20,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801346923] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-18 14:31:20,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-18 14:31:20,842 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-18 14:31:20,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65041884] [2022-03-18 14:31:20,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-18 14:31:20,843 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-18 14:31:20,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:31:20,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-18 14:31:20,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-18 14:31:20,844 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 14:31:22,873 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-18 14:31:22,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:31:22,893 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2022-03-18 14:31:22,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-18 14:31:22,894 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-03-18 14:31:22,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:31:22,895 INFO L225 Difference]: With dead ends: 37 [2022-03-18 14:31:22,895 INFO L226 Difference]: Without dead ends: 35 [2022-03-18 14:31:22,895 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-18 14:31:22,896 INFO L912 BasicCegarLoop]: 23 mSDtfsCounter, 7 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:31:22,896 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 88 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 1 Unknown, 0 Unchecked, 2.0s Time] [2022-03-18 14:31:22,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-18 14:31:22,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2022-03-18 14:31:22,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-03-18 14:31:22,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2022-03-18 14:31:22,901 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2022-03-18 14:31:22,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:31:22,901 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2022-03-18 14:31:22,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-03-18 14:31:22,901 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2022-03-18 14:31:22,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-03-18 14:31:22,902 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:31:22,902 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-18 14:31:22,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-18 14:31:23,113 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:23,114 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:31:23,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:31:23,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2022-03-18 14:31:23,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:31:23,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603791796] [2022-03-18 14:31:23,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:23,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:31:23,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:31:23,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132595851] [2022-03-18 14:31:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:23,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:23,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:23,126 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:31:23,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-18 14:31:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:31:23,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 10 conjunts are in the unsatisfiable core [2022-03-18 14:31:23,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:31:23,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:31:23,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:31:23,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:31:23,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:31:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603791796] [2022-03-18 14:31:23,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:31:23,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132595851] [2022-03-18 14:31:23,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132595851] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:31:23,345 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:31:23,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2022-03-18 14:31:23,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551908789] [2022-03-18 14:31:23,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:31:23,345 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-03-18 14:31:23,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:31:23,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-03-18 14:31:23,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-03-18 14:31:23,346 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 14:31:23,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:31:23,415 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2022-03-18 14:31:23,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-18 14:31:23,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) Word has length 29 [2022-03-18 14:31:23,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:31:23,417 INFO L225 Difference]: With dead ends: 39 [2022-03-18 14:31:23,417 INFO L226 Difference]: Without dead ends: 34 [2022-03-18 14:31:23,417 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-03-18 14:31:23,418 INFO L912 BasicCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:31:23,418 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 112 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:31:23,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-03-18 14:31:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2022-03-18 14:31:23,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-03-18 14:31:23,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-03-18 14:31:23,422 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-03-18 14:31:23,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:31:23,422 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-03-18 14:31:23,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 3 states have call predecessors, (5), 1 states have call successors, (5) [2022-03-18 14:31:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-03-18 14:31:23,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-18 14:31:23,423 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:31:23,423 INFO L500 BasicCegarLoop]: trace histogram [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] [2022-03-18 14:31:23,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-18 14:31:23,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:23,639 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:31:23,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:31:23,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2022-03-18 14:31:23,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:31:23,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905917086] [2022-03-18 14:31:23,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:23,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:31:23,647 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:31:23,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [941073682] [2022-03-18 14:31:23,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:23,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:23,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:23,648 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:31:23,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-18 14:31:23,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-18 14:31:23,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-18 14:31:23,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:31:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:31:23,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:31:23,816 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:31:23,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:31:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905917086] [2022-03-18 14:31:23,816 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:31:23,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941073682] [2022-03-18 14:31:23,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941073682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:31:23,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:31:23,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-03-18 14:31:23,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219111766] [2022-03-18 14:31:23,817 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:31:23,817 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-18 14:31:23,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:31:23,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-18 14:31:23,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-03-18 14:31:23,818 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-18 14:31:23,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:31:23,879 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2022-03-18 14:31:23,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-18 14:31:23,880 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 32 [2022-03-18 14:31:23,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:31:23,882 INFO L225 Difference]: With dead ends: 61 [2022-03-18 14:31:23,882 INFO L226 Difference]: Without dead ends: 56 [2022-03-18 14:31:23,883 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-03-18 14:31:23,884 INFO L912 BasicCegarLoop]: 29 mSDtfsCounter, 43 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-18 14:31:23,884 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 116 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-18 14:31:23,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-18 14:31:23,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-03-18 14:31:23,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-03-18 14:31:23,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2022-03-18 14:31:23,904 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 32 [2022-03-18 14:31:23,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:31:23,904 INFO L478 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2022-03-18 14:31:23,904 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2022-03-18 14:31:23,904 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2022-03-18 14:31:23,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-18 14:31:23,905 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:31:23,905 INFO L500 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:31:23,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-18 14:31:24,111 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:24,112 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:31:24,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:31:24,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 2 times [2022-03-18 14:31:24,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:31:24,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461390036] [2022-03-18 14:31:24,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:24,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:31:24,128 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:31:24,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559101721] [2022-03-18 14:31:24,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-18 14:31:24,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:24,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:24,135 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:31:24,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-18 14:31:24,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-18 14:31:24,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:31:24,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-18 14:31:24,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:31:24,301 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:31:24,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:31:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-03-18 14:31:24,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:31:24,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461390036] [2022-03-18 14:31:24,449 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:31:24,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559101721] [2022-03-18 14:31:24,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559101721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:31:24,450 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:31:24,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-03-18 14:31:24,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521888335] [2022-03-18 14:31:24,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:31:24,451 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-18 14:31:24,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:31:24,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-18 14:31:24,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-03-18 14:31:24,452 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-18 14:31:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:31:24,596 INFO L93 Difference]: Finished difference Result 115 states and 131 transitions. [2022-03-18 14:31:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-18 14:31:24,597 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) Word has length 59 [2022-03-18 14:31:24,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:31:24,597 INFO L225 Difference]: With dead ends: 115 [2022-03-18 14:31:24,598 INFO L226 Difference]: Without dead ends: 110 [2022-03-18 14:31:24,598 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-03-18 14:31:24,598 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 97 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:31:24,599 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 148 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:31:24,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-18 14:31:24,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-18 14:31:24,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-03-18 14:31:24,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2022-03-18 14:31:24,609 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 59 [2022-03-18 14:31:24,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:31:24,609 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2022-03-18 14:31:24,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 10 states have call predecessors, (14), 11 states have call successors, (14) [2022-03-18 14:31:24,609 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2022-03-18 14:31:24,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-03-18 14:31:24,611 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:31:24,611 INFO L500 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:31:24,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-18 14:31:24,827 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:24,828 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:31:24,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:31:24,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 3 times [2022-03-18 14:31:24,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:31:24,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172151737] [2022-03-18 14:31:24,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:24,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:31:24,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:31:24,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952716777] [2022-03-18 14:31:24,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-18 14:31:24,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:24,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:24,839 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:31:24,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-18 14:31:26,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-03-18 14:31:26,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:31:26,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-18 14:31:26,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:31:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:31:27,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:31:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 449 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-03-18 14:31:27,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:31:27,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172151737] [2022-03-18 14:31:27,484 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:31:27,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952716777] [2022-03-18 14:31:27,484 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952716777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:31:27,484 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:31:27,484 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-03-18 14:31:27,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415370945] [2022-03-18 14:31:27,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:31:27,485 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-18 14:31:27,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:31:27,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-18 14:31:27,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-03-18 14:31:27,486 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-18 14:31:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:31:27,845 INFO L93 Difference]: Finished difference Result 223 states and 257 transitions. [2022-03-18 14:31:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-03-18 14:31:27,845 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) Word has length 113 [2022-03-18 14:31:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:31:27,847 INFO L225 Difference]: With dead ends: 223 [2022-03-18 14:31:27,847 INFO L226 Difference]: Without dead ends: 218 [2022-03-18 14:31:27,848 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-03-18 14:31:27,848 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 218 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-18 14:31:27,848 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 256 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-18 14:31:27,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-18 14:31:27,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 218. [2022-03-18 14:31:27,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 166 states have (on average 1.1385542168674698) internal successors, (189), 166 states have internal predecessors, (189), 27 states have call successors, (27), 26 states have call predecessors, (27), 24 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-18 14:31:27,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 241 transitions. [2022-03-18 14:31:27,869 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 241 transitions. Word has length 113 [2022-03-18 14:31:27,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:31:27,870 INFO L478 AbstractCegarLoop]: Abstraction has 218 states and 241 transitions. [2022-03-18 14:31:27,870 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (26), 22 states have call predecessors, (26), 23 states have call successors, (26) [2022-03-18 14:31:27,870 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 241 transitions. [2022-03-18 14:31:27,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-03-18 14:31:27,872 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:31:27,872 INFO L500 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:31:27,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-18 14:31:28,079 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:28,079 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:31:28,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:31:28,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1234385578, now seen corresponding path program 4 times [2022-03-18 14:31:28,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:31:28,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631375333] [2022-03-18 14:31:28,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:28,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:31:28,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:31:28,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063769483] [2022-03-18 14:31:28,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-18 14:31:28,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:28,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:28,103 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:31:28,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-18 14:31:28,312 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-18 14:31:28,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:31:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 533 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-18 14:31:28,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:31:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:31:28,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:31:29,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2171 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 928 trivial. 0 not checked. [2022-03-18 14:31:29,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:31:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631375333] [2022-03-18 14:31:29,760 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:31:29,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063769483] [2022-03-18 14:31:29,760 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063769483] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:31:29,760 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:31:29,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-03-18 14:31:29,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049947497] [2022-03-18 14:31:29,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:31:29,762 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-18 14:31:29,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:31:29,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-18 14:31:29,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-03-18 14:31:29,764 INFO L87 Difference]: Start difference. First operand 218 states and 241 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-03-18 14:31:30,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:31:30,905 INFO L93 Difference]: Finished difference Result 439 states and 509 transitions. [2022-03-18 14:31:30,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-03-18 14:31:30,906 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) Word has length 221 [2022-03-18 14:31:30,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:31:30,908 INFO L225 Difference]: With dead ends: 439 [2022-03-18 14:31:30,908 INFO L226 Difference]: Without dead ends: 434 [2022-03-18 14:31:30,911 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 393 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-03-18 14:31:30,911 INFO L912 BasicCegarLoop]: 71 mSDtfsCounter, 725 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 725 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-18 14:31:30,911 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [725 Valid, 518 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-18 14:31:30,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-03-18 14:31:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 434. [2022-03-18 14:31:30,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 334 states have (on average 1.1407185628742516) internal successors, (381), 334 states have internal predecessors, (381), 51 states have call successors, (51), 50 states have call predecessors, (51), 48 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-18 14:31:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 481 transitions. [2022-03-18 14:31:30,958 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 481 transitions. Word has length 221 [2022-03-18 14:31:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:31:30,959 INFO L478 AbstractCegarLoop]: Abstraction has 434 states and 481 transitions. [2022-03-18 14:31:30,959 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (52), 26 states have call predecessors, (52), 25 states have return successors, (50), 46 states have call predecessors, (50), 47 states have call successors, (50) [2022-03-18 14:31:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 481 transitions. [2022-03-18 14:31:30,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2022-03-18 14:31:30,966 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:31:30,966 INFO L500 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:31:30,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-03-18 14:31:31,179 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,SelfDestructingSolverStorable7 [2022-03-18 14:31:31,180 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:31:31,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:31:31,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1876588118, now seen corresponding path program 5 times [2022-03-18 14:31:31,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:31:31,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070297985] [2022-03-18 14:31:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:31,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:31:31,194 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:31:31,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213036001] [2022-03-18 14:31:31,194 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-18 14:31:31,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:31,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:31,196 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:31:31,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-18 14:31:33,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 47 check-sat command(s) [2022-03-18 14:31:33,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-18 14:31:33,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 1013 conjuncts, 97 conjunts are in the unsatisfiable core [2022-03-18 14:31:33,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-18 14:31:34,768 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 9407 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-18 14:31:34,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-18 14:31:37,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9503 backedges. 92 proven. 5267 refuted. 0 times theorem prover too weak. 4144 trivial. 0 not checked. [2022-03-18 14:31:37,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-18 14:31:37,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070297985] [2022-03-18 14:31:37,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-18 14:31:37,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213036001] [2022-03-18 14:31:37,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213036001] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-18 14:31:37,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-18 14:31:37,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-03-18 14:31:37,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137537464] [2022-03-18 14:31:37,185 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-18 14:31:37,186 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-03-18 14:31:37,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-18 14:31:37,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-03-18 14:31:37,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4565, Invalid=4941, Unknown=0, NotChecked=0, Total=9506 [2022-03-18 14:31:37,189 INFO L87 Difference]: Start difference. First operand 434 states and 481 transitions. Second operand has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-03-18 14:31:41,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-18 14:31:41,121 INFO L93 Difference]: Finished difference Result 871 states and 1013 transitions. [2022-03-18 14:31:41,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 190 states. [2022-03-18 14:31:41,122 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) Word has length 437 [2022-03-18 14:31:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-18 14:31:41,125 INFO L225 Difference]: With dead ends: 871 [2022-03-18 14:31:41,125 INFO L226 Difference]: Without dead ends: 866 [2022-03-18 14:31:41,132 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 966 GetRequests, 777 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5452 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=13540, Invalid=22750, Unknown=0, NotChecked=0, Total=36290 [2022-03-18 14:31:41,132 INFO L912 BasicCegarLoop]: 119 mSDtfsCounter, 1515 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 648 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1515 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 1111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-18 14:31:41,132 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [1515 Valid, 974 Invalid, 1111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 648 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-18 14:31:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2022-03-18 14:31:41,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2022-03-18 14:31:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 670 states have (on average 1.1417910447761195) internal successors, (765), 670 states have internal predecessors, (765), 99 states have call successors, (99), 98 states have call predecessors, (99), 96 states have return successors, (97), 97 states have call predecessors, (97), 97 states have call successors, (97) [2022-03-18 14:31:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 961 transitions. [2022-03-18 14:31:41,169 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 961 transitions. Word has length 437 [2022-03-18 14:31:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-18 14:31:41,170 INFO L478 AbstractCegarLoop]: Abstraction has 866 states and 961 transitions. [2022-03-18 14:31:41,171 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 5.408163265306122) internal successors, (530), 98 states have internal predecessors, (530), 96 states have call successors, (100), 50 states have call predecessors, (100), 49 states have return successors, (98), 94 states have call predecessors, (98), 95 states have call successors, (98) [2022-03-18 14:31:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 961 transitions. [2022-03-18 14:31:41,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 870 [2022-03-18 14:31:41,185 INFO L492 BasicCegarLoop]: Found error trace [2022-03-18 14:31:41,185 INFO L500 BasicCegarLoop]: trace histogram [95, 95, 94, 94, 94, 94, 94, 94, 94, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-18 14:31:41,194 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-18 14:31:41,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:41,393 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-18 14:31:41,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-18 14:31:41,393 INFO L85 PathProgramCache]: Analyzing trace with hash 2015680598, now seen corresponding path program 6 times [2022-03-18 14:31:41,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-18 14:31:41,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847456148] [2022-03-18 14:31:41,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-18 14:31:41,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-18 14:31:41,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-18 14:31:41,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512220158] [2022-03-18 14:31:41,413 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-18 14:31:41,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-18 14:31:41,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-18 14:31:41,415 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-18 14:31:41,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process