/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/hard-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 00:56:46,459 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 00:56:46,460 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 00:56:46,495 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 00:56:46,501 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-03-20 00:56:46,502 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-03-20 00:56:46,502 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-03-20 00:56:46,503 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-03-20 00:56:46,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-03-20 00:56:46,504 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-03-20 00:56:46,505 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-03-20 00:56:46,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-03-20 00:56:46,509 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-03-20 00:56:46,512 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-03-20 00:56:46,512 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-03-20 00:56:46,513 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-03-20 00:56:46,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-03-20 00:56:46,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-03-20 00:56:46,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 00:56:46,520 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 00:56:46,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 00:56:46,523 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-03-20 00:56:46,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 00:56:46,543 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 00:56:46,543 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-20 00:56:46,543 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-20 00:56:46,544 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-20 00:56:46,544 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-20 00:56:46,545 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-20 00:56:46,545 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-20 00:56:46,545 INFO L138 SettingsManager]: * Use SBE=true [2022-03-20 00:56:46,546 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 00:56:46,546 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 00:56:46,546 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 00:56:46,546 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 00:56:46,546 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 00:56:46,546 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 00:56:46,546 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 00:56:46,546 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 00:56:46,547 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 00:56:46,547 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 00:56:46,547 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 00:56:46,547 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 00:56:46,547 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 00:56:46,547 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 00:56:46,548 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 00:56:46,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:56:46,548 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 00:56:46,548 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-20 00:56:46,548 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-20 00:56:46,548 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-20 00:56:46,548 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-20 00:56:46,548 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-20 00:56:46,548 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-03-20 00:56:46,548 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 00:56:46,549 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 00:56:46,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 00:56:46,756 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 00:56:46,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 00:56:46,758 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 00:56:46,758 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 00:56:46,759 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2022-03-20 00:56:46,795 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de62a0f33/6dfff2058a344a4492815d59fd8f627c/FLAGe2db066ca [2022-03-20 00:56:47,195 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 00:56:47,195 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound10.c [2022-03-20 00:56:47,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de62a0f33/6dfff2058a344a4492815d59fd8f627c/FLAGe2db066ca [2022-03-20 00:56:47,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/de62a0f33/6dfff2058a344a4492815d59fd8f627c [2022-03-20 00:56:47,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 00:56:47,217 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 00:56:47,219 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 00:56:47,219 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 00:56:47,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 00:56:47,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:56:47" (1/1) ... [2022-03-20 00:56:47,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e6ec344 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47, skipping insertion in model container [2022-03-20 00:56:47,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 12:56:47" (1/1) ... [2022-03-20 00:56:47,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 00:56:47,237 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 00:56:47,394 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/hard-ll_valuebound10.c[538,551] [2022-03-20 00:56:47,414 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:56:47,422 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 00:56:47,432 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/hard-ll_valuebound10.c[538,551] [2022-03-20 00:56:47,443 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 00:56:47,453 INFO L208 MainTranslator]: Completed translation [2022-03-20 00:56:47,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47 WrapperNode [2022-03-20 00:56:47,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 00:56:47,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 00:56:47,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 00:56:47,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 00:56:47,462 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47" (1/1) ... [2022-03-20 00:56:47,462 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47" (1/1) ... [2022-03-20 00:56:47,467 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47" (1/1) ... [2022-03-20 00:56:47,467 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47" (1/1) ... [2022-03-20 00:56:47,476 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47" (1/1) ... [2022-03-20 00:56:47,481 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47" (1/1) ... [2022-03-20 00:56:47,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47" (1/1) ... [2022-03-20 00:56:47,489 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 00:56:47,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 00:56:47,490 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 00:56:47,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 00:56:47,490 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47" (1/1) ... [2022-03-20 00:56:47,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 00:56:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:47,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 00:56:47,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 00:56:47,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 00:56:47,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 00:56:47,546 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 00:56:47,546 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 00:56:47,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 00:56:47,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 00:56:47,547 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 00:56:47,547 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 00:56:47,547 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 00:56:47,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 00:56:47,596 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 00:56:47,597 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 00:56:47,703 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 00:56:47,707 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 00:56:47,707 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-20 00:56:47,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:56:47 BoogieIcfgContainer [2022-03-20 00:56:47,708 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 00:56:47,709 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 00:56:47,709 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 00:56:47,713 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 00:56:47,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 12:56:47" (1/3) ... [2022-03-20 00:56:47,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c22432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:56:47, skipping insertion in model container [2022-03-20 00:56:47,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 12:56:47" (2/3) ... [2022-03-20 00:56:47,714 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c22432 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 12:56:47, skipping insertion in model container [2022-03-20 00:56:47,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 12:56:47" (3/3) ... [2022-03-20 00:56:47,715 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound10.c [2022-03-20 00:56:47,719 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-20 00:56:47,719 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 00:56:47,749 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 00:56:47,753 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 00:56:47,753 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 00:56:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 00:56:47,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 00:56:47,785 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:47,786 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:47,786 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:47,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-20 00:56:47,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:47,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522836863] [2022-03-20 00:56:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:47,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:47,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:56:47,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:47,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:56:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:56:48,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:56:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,014 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:56:48,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:48,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522836863] [2022-03-20 00:56:48,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522836863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:56:48,016 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:56:48,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 00:56:48,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038270093] [2022-03-20 00:56:48,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:48,021 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 00:56:48,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:48,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 00:56:48,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:56:48,043 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 00:56:48,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:48,129 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-20 00:56:48,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 00:56:48,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-20 00:56:48,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:48,136 INFO L225 Difference]: With dead ends: 69 [2022-03-20 00:56:48,136 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 00:56:48,140 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 00:56:48,144 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:48,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:56:48,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 00:56:48,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 00:56:48,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:56:48,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-20 00:56:48,179 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-20 00:56:48,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:48,179 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-20 00:56:48,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 00:56:48,180 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-20 00:56:48,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 00:56:48,181 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:48,181 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:48,182 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 00:56:48,183 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:48,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:48,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-20 00:56:48,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:48,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831984057] [2022-03-20 00:56:48,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:48,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:48,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:56:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:56:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:56:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:56:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:56:48,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:48,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831984057] [2022-03-20 00:56:48,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831984057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:56:48,338 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:56:48,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:56:48,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049092580] [2022-03-20 00:56:48,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:48,340 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:56:48,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:48,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:56:48,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:56:48,341 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 00:56:48,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:48,524 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-20 00:56:48,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:56:48,524 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-20 00:56:48,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:48,525 INFO L225 Difference]: With dead ends: 46 [2022-03-20 00:56:48,525 INFO L226 Difference]: Without dead ends: 44 [2022-03-20 00:56:48,526 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:56:48,527 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:48,527 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:56:48,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-20 00:56:48,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-20 00:56:48,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:56:48,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-20 00:56:48,534 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-20 00:56:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:48,534 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-20 00:56:48,535 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-20 00:56:48,535 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-20 00:56:48,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-20 00:56:48,535 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:48,536 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:48,536 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 00:56:48,536 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:48,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:48,536 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-20 00:56:48,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:48,537 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959058219] [2022-03-20 00:56:48,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:48,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 00:56:48,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 00:56:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-20 00:56:48,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-20 00:56:48,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-20 00:56:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,620 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 00:56:48,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:48,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959058219] [2022-03-20 00:56:48,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959058219] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:56:48,620 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:56:48,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 00:56:48,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372510923] [2022-03-20 00:56:48,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:48,621 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:56:48,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:48,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:56:48,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:56:48,622 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:56:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:48,783 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-20 00:56:48,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:56:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-03-20 00:56:48,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:48,785 INFO L225 Difference]: With dead ends: 50 [2022-03-20 00:56:48,785 INFO L226 Difference]: Without dead ends: 48 [2022-03-20 00:56:48,785 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:56:48,786 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:48,786 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:56:48,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-20 00:56:48,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-20 00:56:48,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-20 00:56:48,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-20 00:56:48,792 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-20 00:56:48,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:48,793 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-20 00:56:48,793 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 00:56:48,793 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-20 00:56:48,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 00:56:48,793 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:48,794 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:48,794 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 00:56:48,794 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:48,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-20 00:56:48,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:48,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237144955] [2022-03-20 00:56:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:48,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:48,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:56:48,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1422227052] [2022-03-20 00:56:48,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:48,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:48,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:48,820 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:56:48,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 00:56:48,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:48,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 12 conjunts are in the unsatisfiable core [2022-03-20 00:56:48,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:56:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-03-20 00:56:49,086 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:56:49,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237144955] [2022-03-20 00:56:49,086 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:56:49,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422227052] [2022-03-20 00:56:49,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422227052] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:56:49,086 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:56:49,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 00:56:49,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423743353] [2022-03-20 00:56:49,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:49,087 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-20 00:56:49,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:49,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-20 00:56:49,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-03-20 00:56:49,088 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:56:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:49,183 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-20 00:56:49,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-20 00:56:49,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-20 00:56:49,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:49,187 INFO L225 Difference]: With dead ends: 69 [2022-03-20 00:56:49,187 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 00:56:49,188 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:56:49,194 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 20 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:49,195 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 225 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:56:49,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 00:56:49,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 00:56:49,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-20 00:56:49,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-20 00:56:49,207 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-20 00:56:49,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:49,207 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-20 00:56:49,207 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-20 00:56:49,207 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-20 00:56:49,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-20 00:56:49,208 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:49,208 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:49,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 00:56:49,433 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:49,434 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-20 00:56:49,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:49,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620149224] [2022-03-20 00:56:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:49,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:49,450 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:56:49,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2009928679] [2022-03-20 00:56:49,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:49,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:49,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:49,452 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:56:49,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 00:56:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:49,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-20 00:56:49,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:56:49,737 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-20 00:56:49,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:56:49,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 00:56:49,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:49,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620149224] [2022-03-20 00:56:49,875 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:56:49,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009928679] [2022-03-20 00:56:49,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009928679] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:56:49,875 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:56:49,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-20 00:56:49,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733771046] [2022-03-20 00:56:49,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:49,875 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 00:56:49,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:49,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 00:56:49,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:56:49,876 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:56:49,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:49,922 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-20 00:56:49,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:56:49,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-20 00:56:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:49,926 INFO L225 Difference]: With dead ends: 68 [2022-03-20 00:56:49,926 INFO L226 Difference]: Without dead ends: 66 [2022-03-20 00:56:49,926 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-20 00:56:49,927 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 16 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:49,927 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 145 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:56:49,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-20 00:56:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-20 00:56:49,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 00:56:49,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-20 00:56:49,942 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-20 00:56:49,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:49,943 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-20 00:56:49,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:56:49,943 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-20 00:56:49,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-20 00:56:49,949 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:49,949 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:49,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-20 00:56:50,167 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:50,168 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:50,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:50,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-20 00:56:50,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:50,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135500752] [2022-03-20 00:56:50,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:50,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:50,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:56:50,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503093482] [2022-03-20 00:56:50,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:50,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:50,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:50,178 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:56:50,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 00:56:50,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:50,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-03-20 00:56:50,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:56:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-20 00:56:50,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:56:50,504 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-20 00:56:50,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:50,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135500752] [2022-03-20 00:56:50,505 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:56:50,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503093482] [2022-03-20 00:56:50,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503093482] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-20 00:56:50,505 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-20 00:56:50,505 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-20 00:56:50,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611034091] [2022-03-20 00:56:50,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:50,506 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:56:50,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:50,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:56:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-20 00:56:50,506 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:56:50,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:50,590 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-20 00:56:50,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:56:50,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-20 00:56:50,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:50,592 INFO L225 Difference]: With dead ends: 76 [2022-03-20 00:56:50,592 INFO L226 Difference]: Without dead ends: 74 [2022-03-20 00:56:50,592 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:56:50,592 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:50,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:56:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-20 00:56:50,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-20 00:56:50,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 00:56:50,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-20 00:56:50,600 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-20 00:56:50,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:50,601 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-20 00:56:50,601 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-20 00:56:50,601 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-20 00:56:50,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 00:56:50,601 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:50,602 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:50,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 00:56:50,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:50,816 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:50,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:50,816 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-20 00:56:50,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:50,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042021385] [2022-03-20 00:56:50,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:50,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:50,823 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:56:50,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146925614] [2022-03-20 00:56:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:50,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:50,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:50,827 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:56:50,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 00:56:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:50,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:56:50,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:56:50,966 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-20 00:56:50,966 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:56:50,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:56:50,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042021385] [2022-03-20 00:56:50,967 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:56:50,967 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146925614] [2022-03-20 00:56:50,967 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146925614] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:56:50,967 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:56:50,967 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:56:50,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740557698] [2022-03-20 00:56:50,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:56:50,970 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:56:50,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:56:50,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:56:50,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:56:50,971 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 00:56:51,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:56:51,018 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-20 00:56:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:56:51,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-20 00:56:51,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:56:51,025 INFO L225 Difference]: With dead ends: 79 [2022-03-20 00:56:51,025 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 00:56:51,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 00:56:51,026 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:56:51,027 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 00:56:51,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 00:56:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-20 00:56:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-20 00:56:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-20 00:56:51,038 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-20 00:56:51,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:56:51,039 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-20 00:56:51,039 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-20 00:56:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-20 00:56:51,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-20 00:56:51,041 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:56:51,041 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:56:51,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 00:56:51,255 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:51,255 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:56:51,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:56:51,256 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-20 00:56:51,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:56:51,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974249576] [2022-03-20 00:56:51,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:51,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:56:51,263 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:56:51,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1920887589] [2022-03-20 00:56:51,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:56:51,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:56:51,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:56:51,264 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:56:51,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 00:56:51,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:56:51,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjunts are in the unsatisfiable core [2022-03-20 00:56:51,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:56:51,893 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-20 00:56:51,893 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:57:21,076 WARN L232 SmtUtils]: Spent 18.06s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:58:30,860 WARN L232 SmtUtils]: Spent 21.19s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:59:24,283 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 36 proven. 8 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-03-20 00:59:24,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:59:24,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974249576] [2022-03-20 00:59:24,283 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:59:24,284 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920887589] [2022-03-20 00:59:24,284 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920887589] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:59:24,284 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:59:24,284 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 18 [2022-03-20 00:59:24,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591968235] [2022-03-20 00:59:24,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:59:24,284 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-20 00:59:24,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:59:24,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-20 00:59:24,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-03-20 00:59:24,285 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 00:59:42,774 WARN L232 SmtUtils]: Spent 15.96s on a formula simplification. DAG size of input: 57 DAG size of output: 27 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 00:59:48,549 WARN L855 $PredicateComparison]: unable to prove that (let ((.cse4 (<= c_main_~d~0 c_main_~r~0)) (.cse0 (mod c_main_~A~0 4294967296)) (.cse2 (mod c_main_~B~0 4294967296))) (and (let ((.cse1 (* 2 c_main_~p~0)) (.cse3 (* 2 c_main_~d~0))) (or (= .cse0 (+ (* (+ c_main_~q~0 (div .cse1 2)) .cse2) (* (- 1) (div .cse3 2)) c_main_~r~0)) (not (= (* .cse1 .cse2) .cse3)) (not .cse4) (<= .cse3 c_main_~r~0))) (or .cse4 (not (= c_main_~d~0 (* c_main_~p~0 .cse2))) (let ((.cse7 (= (mod c_main_~p~0 2) 0)) (.cse13 (div c_main_~p~0 2))) (let ((.cse9 (* (+ c_main_~q~0 .cse13) .cse2)) (.cse10 (not .cse7)) (.cse5 (* (- 1) (div c_main_~d~0 2))) (.cse6 (* (+ c_main_~q~0 .cse13 1) .cse2)) (.cse12 (= (mod c_main_~d~0 2) 0)) (.cse11 (< c_main_~d~0 0))) (and (or (let ((.cse8 (< c_main_~p~0 0))) (and (or (= .cse0 (+ c_main_~r~0 .cse5 .cse6)) .cse7 (not .cse8)) (or (= .cse0 (+ .cse9 c_main_~r~0 .cse5)) (and .cse10 .cse8)))) (and .cse11 (not .cse12))) (or (and (or (= .cse0 (+ (- 1) .cse9 c_main_~r~0 .cse5)) .cse10) (or .cse7 (= .cse0 (+ (- 1) c_main_~r~0 .cse5 .cse6)))) .cse12 (not .cse11)))))))) is different from true [2022-03-20 00:59:51,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:59:51,069 INFO L93 Difference]: Finished difference Result 144 states and 187 transitions. [2022-03-20 00:59:51,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 00:59:51,069 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) Word has length 75 [2022-03-20 00:59:51,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:59:51,070 INFO L225 Difference]: With dead ends: 144 [2022-03-20 00:59:51,070 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 00:59:51,071 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 63.3s TimeCoverageRelationStatistics Valid=107, Invalid=402, Unknown=1, NotChecked=42, Total=552 [2022-03-20 00:59:51,071 INFO L913 BasicCegarLoop]: 38 mSDtfsCounter, 58 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-03-20 00:59:51,071 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 275 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 380 Invalid, 0 Unknown, 5 Unchecked, 4.0s Time] [2022-03-20 00:59:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 00:59:51,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 103. [2022-03-20 00:59:51,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 60 states have (on average 1.15) internal successors, (69), 65 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 00:59:51,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 127 transitions. [2022-03-20 00:59:51,084 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 127 transitions. Word has length 75 [2022-03-20 00:59:51,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:59:51,085 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 127 transitions. [2022-03-20 00:59:51,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 9 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (20), 8 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-20 00:59:51,085 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 127 transitions. [2022-03-20 00:59:51,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 00:59:51,085 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:59:51,085 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:59:51,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-20 00:59:51,286 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:59:51,286 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:59:51,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:59:51,287 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-20 00:59:51,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:59:51,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16977403] [2022-03-20 00:59:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:59:51,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:59:51,293 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:59:51,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963618795] [2022-03-20 00:59:51,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:59:51,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:59:51,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:59:51,295 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:59:51,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 00:59:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:59:51,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 00:59:51,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:59:51,521 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 00:59:51,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:59:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2022-03-20 00:59:51,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:59:51,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16977403] [2022-03-20 00:59:51,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:59:51,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963618795] [2022-03-20 00:59:51,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963618795] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:59:51,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:59:51,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-03-20 00:59:51,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665676934] [2022-03-20 00:59:51,724 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:59:51,724 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 00:59:51,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:59:51,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 00:59:51,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-03-20 00:59:51,725 INFO L87 Difference]: Start difference. First operand 103 states and 127 transitions. Second operand has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 00:59:51,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:59:51,849 INFO L93 Difference]: Finished difference Result 116 states and 143 transitions. [2022-03-20 00:59:51,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 00:59:51,849 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 86 [2022-03-20 00:59:51,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:59:51,850 INFO L225 Difference]: With dead ends: 116 [2022-03-20 00:59:51,850 INFO L226 Difference]: Without dead ends: 114 [2022-03-20 00:59:51,850 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:59:51,851 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 16 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:59:51,851 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 193 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:59:51,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-20 00:59:51,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2022-03-20 00:59:51,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.1612903225806452) internal successors, (72), 67 states have internal predecessors, (72), 32 states have call successors, (32), 13 states have call predecessors, (32), 12 states have return successors, (30), 26 states have call predecessors, (30), 30 states have call successors, (30) [2022-03-20 00:59:51,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 134 transitions. [2022-03-20 00:59:51,860 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 134 transitions. Word has length 86 [2022-03-20 00:59:51,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:59:51,860 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 134 transitions. [2022-03-20 00:59:51,860 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 6 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-03-20 00:59:51,861 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 134 transitions. [2022-03-20 00:59:51,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 00:59:51,861 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:59:51,861 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:59:51,879 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 00:59:52,075 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:59:52,075 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:59:52,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:59:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1353450239, now seen corresponding path program 2 times [2022-03-20 00:59:52,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:59:52,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805005969] [2022-03-20 00:59:52,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:59:52,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:59:52,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:59:52,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [330392011] [2022-03-20 00:59:52,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 00:59:52,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:59:52,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:59:52,110 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:59:52,111 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 00:59:52,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 00:59:52,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:59:52,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 00:59:52,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:59:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 00:59:52,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:59:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-03-20 00:59:52,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:59:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805005969] [2022-03-20 00:59:52,390 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:59:52,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330392011] [2022-03-20 00:59:52,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330392011] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:59:52,390 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:59:52,390 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2022-03-20 00:59:52,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412743087] [2022-03-20 00:59:52,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:59:52,394 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:59:52,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:59:52,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:59:52,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:59:52,394 INFO L87 Difference]: Start difference. First operand 107 states and 134 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 00:59:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:59:52,484 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-03-20 00:59:52,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-20 00:59:52,484 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 88 [2022-03-20 00:59:52,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:59:52,488 INFO L225 Difference]: With dead ends: 130 [2022-03-20 00:59:52,488 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 00:59:52,488 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:59:52,489 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 1 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:59:52,489 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [2 Valid, 181 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:59:52,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 00:59:52,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-20 00:59:52,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 64 states have (on average 1.15625) internal successors, (74), 69 states have internal predecessors, (74), 34 states have call successors, (34), 13 states have call predecessors, (34), 12 states have return successors, (32), 28 states have call predecessors, (32), 32 states have call successors, (32) [2022-03-20 00:59:52,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 140 transitions. [2022-03-20 00:59:52,505 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 140 transitions. Word has length 88 [2022-03-20 00:59:52,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:59:52,506 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 140 transitions. [2022-03-20 00:59:52,506 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2022-03-20 00:59:52,506 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 140 transitions. [2022-03-20 00:59:52,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-03-20 00:59:52,506 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:59:52,507 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:59:52,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 00:59:52,707 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:59:52,707 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:59:52,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:59:52,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1550260511, now seen corresponding path program 1 times [2022-03-20 00:59:52,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:59:52,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414745913] [2022-03-20 00:59:52,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:59:52,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:59:52,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:59:52,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1075146631] [2022-03-20 00:59:52,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:59:52,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:59:52,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:59:52,725 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:59:52,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 00:59:52,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:59:52,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 11 conjunts are in the unsatisfiable core [2022-03-20 00:59:52,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:59:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-20 00:59:52,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 00:59:53,289 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2022-03-20 00:59:53,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:59:53,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414745913] [2022-03-20 00:59:53,289 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:59:53,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075146631] [2022-03-20 00:59:53,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075146631] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 00:59:53,290 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 00:59:53,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2022-03-20 00:59:53,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916579373] [2022-03-20 00:59:53,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 00:59:53,291 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 00:59:53,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:59:53,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 00:59:53,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-03-20 00:59:53,292 INFO L87 Difference]: Start difference. First operand 111 states and 140 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 00:59:53,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:59:53,460 INFO L93 Difference]: Finished difference Result 119 states and 148 transitions. [2022-03-20 00:59:53,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 00:59:53,460 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 91 [2022-03-20 00:59:53,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:59:53,461 INFO L225 Difference]: With dead ends: 119 [2022-03-20 00:59:53,461 INFO L226 Difference]: Without dead ends: 102 [2022-03-20 00:59:53,461 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 171 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-20 00:59:53,462 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:59:53,462 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 324 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:59:53,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-03-20 00:59:53,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2022-03-20 00:59:53,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 59 states have (on average 1.152542372881356) internal successors, (68), 64 states have internal predecessors, (68), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 00:59:53,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 126 transitions. [2022-03-20 00:59:53,469 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 126 transitions. Word has length 91 [2022-03-20 00:59:53,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:59:53,469 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 126 transitions. [2022-03-20 00:59:53,469 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 8 states have call successors, (29), 2 states have call predecessors, (29), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 00:59:53,469 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 126 transitions. [2022-03-20 00:59:53,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-03-20 00:59:53,470 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:59:53,470 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:59:53,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-20 00:59:53,670 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,SelfDestructingSolverStorable10 [2022-03-20 00:59:53,670 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:59:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:59:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash -941589367, now seen corresponding path program 1 times [2022-03-20 00:59:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:59:53,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926173964] [2022-03-20 00:59:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:59:53,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:59:53,676 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:59:53,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200017702] [2022-03-20 00:59:53,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:59:53,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:59:53,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:59:53,678 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:59:53,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-20 00:59:53,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 00:59:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 4 conjunts are in the unsatisfiable core [2022-03-20 00:59:53,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:59:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2022-03-20 00:59:53,861 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 00:59:53,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 00:59:53,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926173964] [2022-03-20 00:59:53,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 00:59:53,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200017702] [2022-03-20 00:59:53,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200017702] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 00:59:53,861 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 00:59:53,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 00:59:53,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487233043] [2022-03-20 00:59:53,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 00:59:53,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 00:59:53,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 00:59:53,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 00:59:53,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:59:53,863 INFO L87 Difference]: Start difference. First operand 102 states and 126 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 00:59:53,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 00:59:53,933 INFO L93 Difference]: Finished difference Result 116 states and 141 transitions. [2022-03-20 00:59:53,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 00:59:53,934 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 95 [2022-03-20 00:59:53,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 00:59:53,934 INFO L225 Difference]: With dead ends: 116 [2022-03-20 00:59:53,934 INFO L226 Difference]: Without dead ends: 104 [2022-03-20 00:59:53,935 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-03-20 00:59:53,935 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 14 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 00:59:53,935 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 97 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 00:59:53,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-03-20 00:59:53,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-03-20 00:59:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 64 states have internal predecessors, (69), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 26 states have call predecessors, (28), 28 states have call successors, (28) [2022-03-20 00:59:53,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 127 transitions. [2022-03-20 00:59:53,942 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 127 transitions. Word has length 95 [2022-03-20 00:59:53,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 00:59:53,943 INFO L478 AbstractCegarLoop]: Abstraction has 104 states and 127 transitions. [2022-03-20 00:59:53,943 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-20 00:59:53,943 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 127 transitions. [2022-03-20 00:59:53,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-20 00:59:53,943 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 00:59:53,943 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 00:59:53,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-20 00:59:54,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:59:54,161 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 00:59:54,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 00:59:54,162 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 3 times [2022-03-20 00:59:54,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 00:59:54,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065688644] [2022-03-20 00:59:54,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 00:59:54,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 00:59:54,168 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 00:59:54,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377644738] [2022-03-20 00:59:54,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 00:59:54,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 00:59:54,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 00:59:54,172 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 00:59:54,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-20 00:59:54,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-20 00:59:54,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 00:59:54,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2022-03-20 00:59:54,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 00:59:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-03-20 00:59:54,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:00:37,958 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-03-20 01:00:37,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:00:37,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065688644] [2022-03-20 01:00:37,961 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:00:37,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377644738] [2022-03-20 01:00:37,962 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377644738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:00:37,962 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:00:37,962 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2022-03-20 01:00:37,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411950948] [2022-03-20 01:00:37,962 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:00:37,962 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 01:00:37,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:00:37,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 01:00:37,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=277, Unknown=1, NotChecked=0, Total=342 [2022-03-20 01:00:37,963 INFO L87 Difference]: Start difference. First operand 104 states and 127 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) [2022-03-20 01:01:57,050 WARN L232 SmtUtils]: Spent 1.29m on a formula simplification. DAG size of input: 196 DAG size of output: 46 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:01:59,748 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:01,756 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:05,862 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:07,866 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:09,999 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:17,034 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:18,410 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:19,988 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:22,792 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:24,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:32,110 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-03-20 01:02:32,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:02:32,115 INFO L93 Difference]: Finished difference Result 233 states and 312 transitions. [2022-03-20 01:02:32,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-20 01:02:32,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) Word has length 105 [2022-03-20 01:02:32,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:02:32,117 INFO L225 Difference]: With dead ends: 233 [2022-03-20 01:02:32,117 INFO L226 Difference]: Without dead ends: 180 [2022-03-20 01:02:32,117 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 189 SyntacticMatches, 5 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 93.6s TimeCoverageRelationStatistics Valid=129, Invalid=519, Unknown=2, NotChecked=0, Total=650 [2022-03-20 01:02:32,118 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 104 mSDsluCounter, 545 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 222 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 29.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 29.4s IncrementalHoareTripleChecker+Time [2022-03-20 01:02:32,118 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 607 Invalid, 930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 700 Invalid, 8 Unknown, 0 Unchecked, 29.4s Time] [2022-03-20 01:02:32,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-03-20 01:02:32,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 159. [2022-03-20 01:02:32,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 100 states have internal predecessors, (109), 48 states have call successors, (48), 17 states have call predecessors, (48), 16 states have return successors, (46), 41 states have call predecessors, (46), 46 states have call successors, (46) [2022-03-20 01:02:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 203 transitions. [2022-03-20 01:02:32,131 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 203 transitions. Word has length 105 [2022-03-20 01:02:32,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:02:32,131 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 203 transitions. [2022-03-20 01:02:32,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 17 states have internal predecessors, (44), 11 states have call successors, (33), 2 states have call predecessors, (33), 2 states have return successors, (31), 10 states have call predecessors, (31), 9 states have call successors, (31) [2022-03-20 01:02:32,131 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 203 transitions. [2022-03-20 01:02:32,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 01:02:32,132 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:02:32,132 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:02:32,149 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-20 01:02:32,341 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-20 01:02:32,341 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:02:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:02:32,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 2 times [2022-03-20 01:02:32,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:02:32,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443166485] [2022-03-20 01:02:32,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:02:32,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:02:32,351 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:02:32,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042799706] [2022-03-20 01:02:32,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 01:02:32,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:02:32,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:02:32,352 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:02:32,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-20 01:02:32,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 01:02:32,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:02:32,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 49 conjunts are in the unsatisfiable core [2022-03-20 01:02:32,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:02:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 106 proven. 30 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2022-03-20 01:02:34,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:02:35,564 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 110 proven. 2 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-03-20 01:02:35,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:02:35,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443166485] [2022-03-20 01:02:35,564 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:02:35,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042799706] [2022-03-20 01:02:35,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1042799706] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:02:35,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:02:35,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 20 [2022-03-20 01:02:35,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590376580] [2022-03-20 01:02:35,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:02:35,565 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-20 01:02:35,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:02:35,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-20 01:02:35,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2022-03-20 01:02:35,566 INFO L87 Difference]: Start difference. First operand 159 states and 203 transitions. Second operand has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 01:02:36,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 01:02:36,972 INFO L93 Difference]: Finished difference Result 239 states and 297 transitions. [2022-03-20 01:02:36,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 01:02:36,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) Word has length 116 [2022-03-20 01:02:36,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 01:02:36,973 INFO L225 Difference]: With dead ends: 239 [2022-03-20 01:02:36,973 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 01:02:36,974 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 211 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-03-20 01:02:36,974 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 39 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 01:02:36,974 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 441 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 01:02:36,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 01:02:36,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 139. [2022-03-20 01:02:36,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 84 states have (on average 1.130952380952381) internal successors, (95), 89 states have internal predecessors, (95), 37 states have call successors, (37), 18 states have call predecessors, (37), 17 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-20 01:02:36,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 167 transitions. [2022-03-20 01:02:36,986 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 167 transitions. Word has length 116 [2022-03-20 01:02:36,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 01:02:36,986 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 167 transitions. [2022-03-20 01:02:36,986 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 states have internal predecessors, (41), 10 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (26), 10 states have call predecessors, (26), 8 states have call successors, (26) [2022-03-20 01:02:36,986 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 167 transitions. [2022-03-20 01:02:36,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-20 01:02:36,987 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 01:02:36,987 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 01:02:37,007 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-20 01:02:37,203 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-20 01:02:37,203 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 01:02:37,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 01:02:37,204 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 4 times [2022-03-20 01:02:37,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 01:02:37,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754905154] [2022-03-20 01:02:37,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 01:02:37,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 01:02:37,210 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 01:02:37,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593094727] [2022-03-20 01:02:37,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-20 01:02:37,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 01:02:37,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 01:02:37,217 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-20 01:02:37,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-20 01:02:37,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-20 01:02:37,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 01:02:37,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 56 conjunts are in the unsatisfiable core [2022-03-20 01:02:37,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 01:02:38,369 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 618 trivial. 0 not checked. [2022-03-20 01:02:38,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 01:02:57,803 WARN L232 SmtUtils]: Spent 5.22s on a formula simplification that was a NOOP. DAG size: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:03:35,543 WARN L232 SmtUtils]: Spent 8.84s on a formula simplification that was a NOOP. DAG size: 150 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:04:51,747 WARN L232 SmtUtils]: Spent 31.76s on a formula simplification that was a NOOP. DAG size: 451 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:06:44,225 WARN L232 SmtUtils]: Spent 14.77s on a formula simplification. DAG size of input: 123 DAG size of output: 120 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 01:07:27,287 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 624 trivial. 0 not checked. [2022-03-20 01:07:27,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 01:07:27,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754905154] [2022-03-20 01:07:27,287 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 01:07:27,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593094727] [2022-03-20 01:07:27,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593094727] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 01:07:27,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 01:07:27,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2022-03-20 01:07:27,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624091310] [2022-03-20 01:07:27,288 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-03-20 01:07:27,288 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 01:07:27,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-20 01:07:27,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 01:07:27,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=643, Unknown=1, NotChecked=0, Total=812 [2022-03-20 01:07:27,289 INFO L87 Difference]: Start difference. First operand 139 states and 167 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 18 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (43), 16 states have call predecessors, (43), 16 states have call successors, (43)