/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/sqrt1-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 06:24:37,315 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 06:24:37,317 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 06:24:37,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 06:24:37,392 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 06:24:37,393 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 06:24:37,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 06:24:37,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 06:24:37,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 06:24:37,395 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 06:24:37,396 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 06:24:37,397 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 06:24:37,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 06:24:37,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 06:24:37,413 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 06:24:37,413 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 06:24:37,415 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 06:24:37,420 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 06:24:37,421 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 06:24:37,421 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 06:24:37,424 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 [2022-01-31 06:24:37,439 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 06:24:37,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 06:24:37,440 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 06:24:37,440 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 06:24:37,440 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 06:24:37,440 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 06:24:37,441 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 06:24:37,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 06:24:37,441 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 06:24:37,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 06:24:37,441 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 06:24:37,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 06:24:37,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 06:24:37,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 06:24:37,441 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 06:24:37,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 06:24:37,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 06:24:37,442 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 06:24:37,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 06:24:37,442 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 06:24:37,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 06:24:37,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 06:24:37,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 06:24:37,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 06:24:37,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 06:24:37,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 06:24:37,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 06:24:37,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 06:24:37,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 06:24:37,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 06:24:37,446 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 06:24:37,446 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 06:24:37,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 06:24:37,446 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 06:24:37,609 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 06:24:37,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 06:24:37,635 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 06:24:37,636 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 06:24:37,637 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 06:24:37,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound20.c [2022-01-31 06:24:37,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a967a880a/92831aaa583a4c02851950fdcefde554/FLAG6d96a24e0 [2022-01-31 06:24:38,098 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 06:24:38,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound20.c [2022-01-31 06:24:38,103 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a967a880a/92831aaa583a4c02851950fdcefde554/FLAG6d96a24e0 [2022-01-31 06:24:38,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a967a880a/92831aaa583a4c02851950fdcefde554 [2022-01-31 06:24:38,114 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 06:24:38,115 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 06:24:38,116 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 06:24:38,116 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 06:24:38,122 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 06:24:38,123 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:24:38" (1/1) ... [2022-01-31 06:24:38,123 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e91c56d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38, skipping insertion in model container [2022-01-31 06:24:38,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:24:38" (1/1) ... [2022-01-31 06:24:38,128 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 06:24:38,137 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 06:24:38,311 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/sqrt1-ll_valuebound20.c[520,533] [2022-01-31 06:24:38,326 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 06:24:38,332 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 06:24:38,342 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/sqrt1-ll_valuebound20.c[520,533] [2022-01-31 06:24:38,347 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 06:24:38,358 INFO L208 MainTranslator]: Completed translation [2022-01-31 06:24:38,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38 WrapperNode [2022-01-31 06:24:38,359 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 06:24:38,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 06:24:38,360 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 06:24:38,360 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 06:24:38,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38" (1/1) ... [2022-01-31 06:24:38,370 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38" (1/1) ... [2022-01-31 06:24:38,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38" (1/1) ... [2022-01-31 06:24:38,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38" (1/1) ... [2022-01-31 06:24:38,394 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38" (1/1) ... [2022-01-31 06:24:38,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38" (1/1) ... [2022-01-31 06:24:38,399 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38" (1/1) ... [2022-01-31 06:24:38,400 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 06:24:38,401 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 06:24:38,401 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 06:24:38,401 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 06:24:38,402 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38" (1/1) ... [2022-01-31 06:24:38,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 06:24:38,417 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 06:24:38,456 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) [2022-01-31 06:24:38,462 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 [2022-01-31 06:24:38,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 06:24:38,490 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 06:24:38,490 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 06:24:38,490 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 06:24:38,490 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 06:24:38,490 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 06:24:38,490 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 06:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 06:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 06:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 06:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 06:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 06:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 06:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 06:24:38,491 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 06:24:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 06:24:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 06:24:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 06:24:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 06:24:38,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 06:24:38,558 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 06:24:38,560 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 06:24:38,714 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 06:24:38,719 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 06:24:38,719 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-31 06:24:38,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:24:38 BoogieIcfgContainer [2022-01-31 06:24:38,720 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 06:24:38,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 06:24:38,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 06:24:38,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 06:24:38,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:24:38" (1/3) ... [2022-01-31 06:24:38,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579d0894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:24:38, skipping insertion in model container [2022-01-31 06:24:38,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:24:38" (2/3) ... [2022-01-31 06:24:38,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@579d0894 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:24:38, skipping insertion in model container [2022-01-31 06:24:38,747 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:24:38" (3/3) ... [2022-01-31 06:24:38,747 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound20.c [2022-01-31 06:24:38,751 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 06:24:38,751 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 06:24:38,807 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 06:24:38,819 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 06:24:38,819 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 06:24:38,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 06:24:38,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 06:24:38,853 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:24:38,854 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:24:38,855 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:24:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:24:38,860 INFO L85 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2022-01-31 06:24:38,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:24:38,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85247499] [2022-01-31 06:24:38,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:24:38,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:24:38,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:24:39,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 06:24:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:24:39,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 06:24:39,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:24:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 06:24:39,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:24:39,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85247499] [2022-01-31 06:24:39,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85247499] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 06:24:39,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 06:24:39,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 06:24:39,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297248998] [2022-01-31 06:24:39,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:24:39,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 06:24:39,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:24:39,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 06:24:39,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 06:24:39,092 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 06:24:39,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:24:39,154 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2022-01-31 06:24:39,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 06:24:39,157 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-31 06:24:39,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:24:39,163 INFO L225 Difference]: With dead ends: 53 [2022-01-31 06:24:39,163 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 06:24:39,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 06:24:39,169 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 06:24:39,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 32 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 06:24:39,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 06:24:39,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 06:24:39,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 06:24:39,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-01-31 06:24:39,197 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2022-01-31 06:24:39,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:24:39,198 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-01-31 06:24:39,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 06:24:39,198 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-01-31 06:24:39,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-01-31 06:24:39,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:24:39,199 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:24:39,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 06:24:39,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:24:39,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:24:39,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2022-01-31 06:24:39,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:24:39,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992176680] [2022-01-31 06:24:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:24:39,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:24:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:24:39,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 06:24:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:24:39,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 06:24:39,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:24:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 06:24:39,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:24:39,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992176680] [2022-01-31 06:24:39,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992176680] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 06:24:39,300 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 06:24:39,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 06:24:39,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007569957] [2022-01-31 06:24:39,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:24:39,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 06:24:39,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:24:39,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 06:24:39,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-01-31 06:24:39,302 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 06:24:39,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:24:39,484 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2022-01-31 06:24:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 06:24:39,485 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-01-31 06:24:39,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:24:39,488 INFO L225 Difference]: With dead ends: 40 [2022-01-31 06:24:39,488 INFO L226 Difference]: Without dead ends: 38 [2022-01-31 06:24:39,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-01-31 06:24:39,494 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 25 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 06:24:39,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 39 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 06:24:39,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-31 06:24:39,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-01-31 06:24:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 06:24:39,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2022-01-31 06:24:39,518 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2022-01-31 06:24:39,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:24:39,521 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2022-01-31 06:24:39,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 06:24:39,521 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2022-01-31 06:24:39,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 06:24:39,522 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:24:39,522 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:24:39,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 06:24:39,522 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:24:39,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:24:39,523 INFO L85 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2022-01-31 06:24:39,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:24:39,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798283039] [2022-01-31 06:24:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:24:39,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:24:39,544 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 06:24:39,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1567617198] [2022-01-31 06:24:39,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:24:39,545 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:24:39,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 06:24:39,547 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) [2022-01-31 06:24:39,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 06:24:39,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:24:39,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 06:24:39,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 06:24:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 06:24:39,679 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 06:24:39,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:24:39,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798283039] [2022-01-31 06:24:39,680 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 06:24:39,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567617198] [2022-01-31 06:24:39,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567617198] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 06:24:39,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 06:24:39,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 06:24:39,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245469134] [2022-01-31 06:24:39,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:24:39,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 06:24:39,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:24:39,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 06:24:39,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 06:24:39,686 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 06:24:39,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:24:39,731 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2022-01-31 06:24:39,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 06:24:39,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-01-31 06:24:39,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:24:39,733 INFO L225 Difference]: With dead ends: 44 [2022-01-31 06:24:39,733 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 06:24:39,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 06:24:39,736 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 06:24:39,737 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 115 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 06:24:39,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 06:24:39,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-01-31 06:24:39,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 06:24:39,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2022-01-31 06:24:39,751 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2022-01-31 06:24:39,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:24:39,751 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2022-01-31 06:24:39,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 06:24:39,752 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2022-01-31 06:24:39,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 06:24:39,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:24:39,752 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:24:39,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-31 06:24:39,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:24:39,959 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:24:39,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:24:39,959 INFO L85 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2022-01-31 06:24:39,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:24:39,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990591883] [2022-01-31 06:24:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:24:39,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:24:39,974 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 06:24:39,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [668227384] [2022-01-31 06:24:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:24:39,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:24:39,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 06:24:39,976 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) [2022-01-31 06:24:39,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 06:24:40,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:24:40,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-31 06:24:40,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 06:24:40,101 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 06:24:40,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 06:24:40,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:24:40,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990591883] [2022-01-31 06:24:40,101 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 06:24:40,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668227384] [2022-01-31 06:24:40,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668227384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 06:24:40,101 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 06:24:40,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 06:24:40,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50355994] [2022-01-31 06:24:40,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:24:40,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 06:24:40,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:24:40,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 06:24:40,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-31 06:24:40,103 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 06:24:40,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:24:40,142 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2022-01-31 06:24:40,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 06:24:40,143 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-01-31 06:24:40,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:24:40,144 INFO L225 Difference]: With dead ends: 48 [2022-01-31 06:24:40,144 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 06:24:40,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 06:24:40,146 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 6 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 06:24:40,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 118 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 06:24:40,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 06:24:40,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-01-31 06:24:40,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 06:24:40,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2022-01-31 06:24:40,160 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2022-01-31 06:24:40,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:24:40,160 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2022-01-31 06:24:40,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 06:24:40,161 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2022-01-31 06:24:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 06:24:40,162 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:24:40,162 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:24:40,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 06:24:40,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 06:24:40,381 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:24:40,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:24:40,383 INFO L85 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2022-01-31 06:24:40,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:24:40,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507608731] [2022-01-31 06:24:40,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:24:40,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:24:40,398 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 06:24:40,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918481699] [2022-01-31 06:24:40,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:24:40,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:24:40,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 06:24:40,403 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) [2022-01-31 06:24:40,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 06:24:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 06:24:40,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 06:24:40,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 06:24:40,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-31 06:24:40,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 06:24:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-31 06:24:40,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:24:40,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507608731] [2022-01-31 06:24:40,741 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 06:24:40,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918481699] [2022-01-31 06:24:40,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918481699] provided 1 perfect and 1 imperfect interpolant sequences [2022-01-31 06:24:40,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-31 06:24:40,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-01-31 06:24:40,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897636756] [2022-01-31 06:24:40,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 06:24:40,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 06:24:40,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:24:40,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 06:24:40,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-31 06:24:40,744 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 06:24:40,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:24:40,778 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-01-31 06:24:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 06:24:40,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 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 34 [2022-01-31 06:24:40,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:24:40,780 INFO L225 Difference]: With dead ends: 49 [2022-01-31 06:24:40,780 INFO L226 Difference]: Without dead ends: 47 [2022-01-31 06:24:40,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-31 06:24:40,781 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 06:24:40,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 91 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 06:24:40,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-01-31 06:24:40,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-01-31 06:24:40,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 06:24:40,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-01-31 06:24:40,797 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 34 [2022-01-31 06:24:40,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:24:40,797 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-01-31 06:24:40,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-31 06:24:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-01-31 06:24:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 06:24:40,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 06:24:40,800 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 06:24:40,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 06:24:41,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:24:41,018 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 06:24:41,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 06:24:41,018 INFO L85 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2022-01-31 06:24:41,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 06:24:41,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843172551] [2022-01-31 06:24:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 06:24:41,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 06:24:41,025 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 06:24:41,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1181583006] [2022-01-31 06:24:41,026 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 06:24:41,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:24:41,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 06:24:41,028 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) [2022-01-31 06:24:41,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 06:24:41,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 06:24:41,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 06:24:41,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 15 conjunts are in the unsatisfiable core [2022-01-31 06:24:41,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 06:24:41,213 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 06:24:41,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 06:24:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-31 06:24:41,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 06:24:41,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843172551] [2022-01-31 06:24:41,314 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 06:24:41,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181583006] [2022-01-31 06:24:41,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1181583006] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 06:24:41,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 06:24:41,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-31 06:24:41,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355554163] [2022-01-31 06:24:41,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 06:24:41,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 06:24:41,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 06:24:41,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 06:24:41,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-31 06:24:41,316 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-31 06:24:41,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 06:24:41,429 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-01-31 06:24:41,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 06:24:41,430 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) Word has length 39 [2022-01-31 06:24:41,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 06:24:41,432 INFO L225 Difference]: With dead ends: 55 [2022-01-31 06:24:41,432 INFO L226 Difference]: Without dead ends: 0 [2022-01-31 06:24:41,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-31 06:24:41,435 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 06:24:41,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 103 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 06:24:41,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-01-31 06:24:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-01-31 06:24:41,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-31 06:24:41,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-01-31 06:24:41,436 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 39 [2022-01-31 06:24:41,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 06:24:41,436 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-01-31 06:24:41,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2022-01-31 06:24:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-01-31 06:24:41,436 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-01-31 06:24:41,439 INFO L764 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-01-31 06:24:41,456 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-31 06:24:41,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 06:24:41,659 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-01-31 06:24:41,814 INFO L858 garLoopResultBuilder]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2022-01-31 06:24:41,815 INFO L858 garLoopResultBuilder]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2022-01-31 06:24:41,815 INFO L858 garLoopResultBuilder]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2022-01-31 06:24:41,815 INFO L861 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2022-01-31 06:24:41,815 INFO L858 garLoopResultBuilder]: For program point L9(line 9) no Hoare annotation was computed. [2022-01-31 06:24:41,815 INFO L858 garLoopResultBuilder]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2022-01-31 06:24:41,815 INFO L858 garLoopResultBuilder]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2022-01-31 06:24:41,815 INFO L858 garLoopResultBuilder]: For program point L33(lines 30 42) no Hoare annotation was computed. [2022-01-31 06:24:41,816 INFO L854 garLoopResultBuilder]: At program point L31(line 31) the Hoare annotation is: (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-01-31 06:24:41,816 INFO L854 garLoopResultBuilder]: At program point L31-1(line 31) the Hoare annotation is: (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-01-31 06:24:41,816 INFO L858 garLoopResultBuilder]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2022-01-31 06:24:41,816 INFO L858 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-01-31 06:24:41,816 INFO L858 garLoopResultBuilder]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2022-01-31 06:24:41,816 INFO L854 garLoopResultBuilder]: At program point L44(line 44) the Hoare annotation is: (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-01-31 06:24:41,816 INFO L854 garLoopResultBuilder]: At program point L32(line 32) the Hoare annotation is: (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-01-31 06:24:41,817 INFO L861 garLoopResultBuilder]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2022-01-31 06:24:41,817 INFO L854 garLoopResultBuilder]: At program point L30-2(lines 30 42) the Hoare annotation is: (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-01-31 06:24:41,817 INFO L854 garLoopResultBuilder]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) [2022-01-31 06:24:41,817 INFO L861 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: true [2022-01-31 06:24:41,817 INFO L858 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2022-01-31 06:24:41,817 INFO L854 garLoopResultBuilder]: At program point L45(line 45) the Hoare annotation is: (or (and (= (+ main_~t~0 main_~s~0) (+ (* main_~a~0 4) 2 (* main_~a~0 main_~a~0))) (= main_~t~0 (+ (* main_~a~0 2) 1))) (and (= main_~t~0 1) (= main_~s~0 1))) [2022-01-31 06:24:41,817 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2022-01-31 06:24:41,817 INFO L854 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-01-31 06:24:41,817 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2022-01-31 06:24:41,818 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-01-31 06:24:41,818 INFO L861 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-01-31 06:24:41,818 INFO L861 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-01-31 06:24:41,818 INFO L858 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-01-31 06:24:41,818 INFO L861 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2022-01-31 06:24:41,818 INFO L858 garLoopResultBuilder]: For program point L13(lines 13 14) no Hoare annotation was computed. [2022-01-31 06:24:41,818 INFO L858 garLoopResultBuilder]: For program point L12(lines 12 15) no Hoare annotation was computed. [2022-01-31 06:24:41,818 INFO L858 garLoopResultBuilder]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2022-01-31 06:24:41,818 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2022-01-31 06:24:41,818 INFO L858 garLoopResultBuilder]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2022-01-31 06:24:41,821 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1] [2022-01-31 06:24:41,823 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-01-31 06:24:41,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 31.01 06:24:41 BoogieIcfgContainer [2022-01-31 06:24:41,834 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-31 06:24:41,835 INFO L158 Benchmark]: Toolchain (without parser) took 3719.27ms. Allocated memory was 202.4MB in the beginning and 254.8MB in the end (delta: 52.4MB). Free memory was 152.1MB in the beginning and 185.9MB in the end (delta: -33.8MB). Peak memory consumption was 19.7MB. Max. memory is 8.0GB. [2022-01-31 06:24:41,835 INFO L158 Benchmark]: CDTParser took 0.64ms. Allocated memory is still 202.4MB. Free memory was 168.4MB in the beginning and 168.3MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 06:24:41,835 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.58ms. Allocated memory is still 202.4MB. Free memory was 151.8MB in the beginning and 179.6MB in the end (delta: -27.7MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. [2022-01-31 06:24:41,835 INFO L158 Benchmark]: Boogie Preprocessor took 40.34ms. Allocated memory is still 202.4MB. Free memory was 179.6MB in the beginning and 178.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. [2022-01-31 06:24:41,836 INFO L158 Benchmark]: RCFGBuilder took 319.63ms. Allocated memory is still 202.4MB. Free memory was 178.1MB in the beginning and 167.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-01-31 06:24:41,836 INFO L158 Benchmark]: TraceAbstraction took 3112.68ms. Allocated memory was 202.4MB in the beginning and 254.8MB in the end (delta: 52.4MB). Free memory was 167.1MB in the beginning and 185.9MB in the end (delta: -18.9MB). Peak memory consumption was 34.1MB. Max. memory is 8.0GB. [2022-01-31 06:24:41,837 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.64ms. Allocated memory is still 202.4MB. Free memory was 168.4MB in the beginning and 168.3MB in the end (delta: 143.4kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 242.58ms. Allocated memory is still 202.4MB. Free memory was 151.8MB in the beginning and 179.6MB in the end (delta: -27.7MB). Peak memory consumption was 9.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 40.34ms. Allocated memory is still 202.4MB. Free memory was 179.6MB in the beginning and 178.1MB in the end (delta: 1.5MB). Peak memory consumption was 1.0MB. Max. memory is 8.0GB. * RCFGBuilder took 319.63ms. Allocated memory is still 202.4MB. Free memory was 178.1MB in the beginning and 167.6MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 3112.68ms. Allocated memory was 202.4MB in the beginning and 254.8MB in the end (delta: 52.4MB). Free memory was 167.1MB in the beginning and 185.9MB in the end (delta: -18.9MB). Peak memory consumption was 34.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.0s, OverallIterations: 6, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 90 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 68 mSDsluCounter, 498 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 330 mSDsCounter, 72 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 266 IncrementalHoareTripleChecker+Invalid, 338 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 72 mSolverCounterUnsat, 168 mSDtfsCounter, 266 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 217 GetRequests, 182 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=47occurred in iteration=5, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 14 LocationsWithAnnotation, 37 PreInvPairs, 58 NumberOfFragments, 161 HoareAnnotationTreeSize, 37 FomulaSimplifications, 4 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 14 FomulaSimplificationsInter, 476 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 156 NumberOfCodeBlocks, 156 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 221 ConstructedInterpolants, 0 QuantifiedInterpolants, 603 SizeOfPredicates, 5 NumberOfNonLiveVariables, 378 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 8 InterpolantComputations, 5 PerfectInterpolantSequences, 112/120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 30]: Loop Invariant Derived loop invariant: t + s == a * 4 + 2 + a * a && t == a * 2 + 1 RESULT: Ultimate proved your program to be correct! [2022-01-31 06:24:41,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...