/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/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-23 23:59:42,041 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-23 23:59:42,043 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-23 23:59:42,074 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-23 23:59:42,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-23 23:59:42,077 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-23 23:59:42,081 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-23 23:59:42,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-23 23:59:42,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-23 23:59:42,096 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-23 23:59:42,096 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-23 23:59:42,097 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-23 23:59:42,097 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-23 23:59:42,098 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-23 23:59:42,099 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-23 23:59:42,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-23 23:59:42,100 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-23 23:59:42,100 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-23 23:59:42,101 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-23 23:59:42,103 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-23 23:59:42,104 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-23 23:59:42,105 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-23 23:59:42,106 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-23 23:59:42,106 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-23 23:59:42,108 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-02-23 23:59:42,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-23 23:59:42,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-23 23:59:42,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-23 23:59:42,117 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/loopacceleration/qvasr/qvasr_64.epf [2022-02-23 23:59:42,136 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-23 23:59:42,137 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-23 23:59:42,137 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-02-23 23:59:42,137 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-02-23 23:59:42,138 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-02-23 23:59:42,138 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-02-23 23:59:42,138 INFO L138 SettingsManager]: * Use SBE=true [2022-02-23 23:59:42,138 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-23 23:59:42,138 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-23 23:59:42,139 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-23 23:59:42,139 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-23 23:59:42,139 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-23 23:59:42,139 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-23 23:59:42,139 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-23 23:59:42,139 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-23 23:59:42,139 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-23 23:59:42,139 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-23 23:59:42,140 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-23 23:59:42,140 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-23 23:59:42,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 23:59:42,140 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-23 23:59:42,140 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-02-23 23:59:42,140 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-02-23 23:59:42,140 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-02-23 23:59:42,140 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-02-23 23:59:42,141 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-23 23:59:42,141 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-02-23 23:59:42,141 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-02-23 23:59:42,141 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2022-02-23 23:59:42,141 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_QVASR 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-23 23:59:42,313 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-23 23:59:42,335 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-23 23:59:42,337 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-23 23:59:42,338 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-23 23:59:42,339 INFO L275 PluginConnector]: CDTParser initialized [2022-02-23 23:59:42,340 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c [2022-02-23 23:59:42,408 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05baaf782/60fbf1b6fa9042cbbdef37578593028c/FLAG24e8e5ed8 [2022-02-23 23:59:42,738 INFO L306 CDTParser]: Found 1 translation units. [2022-02-23 23:59:42,739 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/prod4br-ll_unwindbound50.c [2022-02-23 23:59:42,748 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05baaf782/60fbf1b6fa9042cbbdef37578593028c/FLAG24e8e5ed8 [2022-02-23 23:59:43,169 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/05baaf782/60fbf1b6fa9042cbbdef37578593028c [2022-02-23 23:59:43,171 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-23 23:59:43,172 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-02-23 23:59:43,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-23 23:59:43,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-23 23:59:43,179 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-23 23:59:43,180 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,181 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@504397cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43, skipping insertion in model container [2022-02-23 23:59:43,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,186 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-23 23:59:43,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-23 23:59:43,317 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/prod4br-ll_unwindbound50.c[524,537] [2022-02-23 23:59:43,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 23:59:43,363 INFO L203 MainTranslator]: Completed pre-run [2022-02-23 23:59:43,373 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/prod4br-ll_unwindbound50.c[524,537] [2022-02-23 23:59:43,381 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-23 23:59:43,392 INFO L208 MainTranslator]: Completed translation [2022-02-23 23:59:43,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43 WrapperNode [2022-02-23 23:59:43,392 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-23 23:59:43,394 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-23 23:59:43,394 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-23 23:59:43,394 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-23 23:59:43,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,407 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,412 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,413 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,417 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,420 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,421 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-23 23:59:43,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-23 23:59:43,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-23 23:59:43,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-23 23:59:43,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-23 23:59:43,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:43,460 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) [2022-02-23 23:59:43,475 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 [2022-02-23 23:59:43,506 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-23 23:59:43,507 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-23 23:59:43,507 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-23 23:59:43,507 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-23 23:59:43,507 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-23 23:59:43,507 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-23 23:59:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-23 23:59:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-23 23:59:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-23 23:59:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-23 23:59:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-23 23:59:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-23 23:59:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-23 23:59:43,508 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-23 23:59:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-23 23:59:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-23 23:59:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-23 23:59:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-23 23:59:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-23 23:59:43,509 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-23 23:59:43,557 INFO L234 CfgBuilder]: Building ICFG [2022-02-23 23:59:43,560 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-23 23:59:43,726 INFO L275 CfgBuilder]: Performing block encoding [2022-02-23 23:59:43,731 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-23 23:59:43,731 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-23 23:59:43,733 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:59:43 BoogieIcfgContainer [2022-02-23 23:59:43,733 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-23 23:59:43,734 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2022-02-23 23:59:43,734 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2022-02-23 23:59:43,735 INFO L275 PluginConnector]: IcfgTransformer initialized [2022-02-23 23:59:43,736 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:59:43" (1/1) ... [2022-02-23 23:59:43,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 11:59:43 BasicIcfg [2022-02-23 23:59:43,760 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2022-02-23 23:59:43,762 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-23 23:59:43,762 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-23 23:59:43,764 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-23 23:59:43,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 11:59:43" (1/4) ... [2022-02-23 23:59:43,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e23f16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:59:43, skipping insertion in model container [2022-02-23 23:59:43,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 11:59:43" (2/4) ... [2022-02-23 23:59:43,765 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e23f16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 11:59:43, skipping insertion in model container [2022-02-23 23:59:43,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 11:59:43" (3/4) ... [2022-02-23 23:59:43,766 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e23f16a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.02 11:59:43, skipping insertion in model container [2022-02-23 23:59:43,766 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 23.02 11:59:43" (4/4) ... [2022-02-23 23:59:43,767 INFO L111 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound50.cqvasr [2022-02-23 23:59:43,771 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-02-23 23:59:43,771 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-23 23:59:43,802 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-23 23:59:43,808 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=FINITE_AUTOMATA, 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 [2022-02-23 23:59:43,808 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-23 23:59:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 23:59:43,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-23 23:59:43,825 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:43,825 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:59:43,826 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:43,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:43,830 INFO L85 PathProgramCache]: Analyzing trace with hash -1119019339, now seen corresponding path program 1 times [2022-02-23 23:59:43,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:43,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159001504] [2022-02-23 23:59:43,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:43,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:43,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:43,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-23 23:59:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:43,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-02-23 23:59:43,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:43,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:43,998 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:43,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159001504] [2022-02-23 23:59:43,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159001504] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:59:43,999 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:59:43,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-23 23:59:44,001 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628205528] [2022-02-23 23:59:44,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:59:44,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-23 23:59:44,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:44,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-23 23:59:44,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-23 23:59:44,030 INFO L87 Difference]: Start difference. First operand has 32 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 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) [2022-02-23 23:59:44,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:44,090 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2022-02-23 23:59:44,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-23 23:59:44,093 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 [2022-02-23 23:59:44,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:44,099 INFO L225 Difference]: With dead ends: 56 [2022-02-23 23:59:44,099 INFO L226 Difference]: Without dead ends: 28 [2022-02-23 23:59:44,101 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 [2022-02-23 23:59:44,105 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 10 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:44,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:59:44,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-23 23:59:44,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-02-23 23:59:44,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 23:59:44,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2022-02-23 23:59:44,137 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 17 [2022-02-23 23:59:44,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:44,137 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2022-02-23 23:59:44,137 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) [2022-02-23 23:59:44,137 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2022-02-23 23:59:44,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 23:59:44,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:44,138 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:59:44,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-23 23:59:44,139 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:44,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash -496973861, now seen corresponding path program 1 times [2022-02-23 23:59:44,140 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:44,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501792334] [2022-02-23 23:59:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:44,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:44,158 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:44,159 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [141982186] [2022-02-23 23:59:44,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:44,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:44,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:44,164 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) [2022-02-23 23:59:44,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-02-23 23:59:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:44,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 23:59:44,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:44,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:44,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:59:44,320 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:44,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501792334] [2022-02-23 23:59:44,321 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:44,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141982186] [2022-02-23 23:59:44,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141982186] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:59:44,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:59:44,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-23 23:59:44,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043091036] [2022-02-23 23:59:44,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:59:44,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-23 23:59:44,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:44,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-23 23:59:44,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 23:59:44,324 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 23:59:44,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:44,336 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2022-02-23 23:59:44,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-23 23:59:44,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2022-02-23 23:59:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:44,338 INFO L225 Difference]: With dead ends: 37 [2022-02-23 23:59:44,338 INFO L226 Difference]: Without dead ends: 29 [2022-02-23 23:59:44,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-23 23:59:44,339 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:44,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 81 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:59:44,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-23 23:59:44,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-23 23:59:44,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-23 23:59:44,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2022-02-23 23:59:44,354 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2022-02-23 23:59:44,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:44,355 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2022-02-23 23:59:44,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-23 23:59:44,355 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2022-02-23 23:59:44,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-23 23:59:44,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:44,356 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:59:44,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-02-23 23:59:44,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:44,572 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:44,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:44,572 INFO L85 PathProgramCache]: Analyzing trace with hash -495871594, now seen corresponding path program 1 times [2022-02-23 23:59:44,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:44,573 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699857499] [2022-02-23 23:59:44,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:44,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:44,585 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:44,586 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [740807842] [2022-02-23 23:59:44,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:44,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:44,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:44,587 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) [2022-02-23 23:59:44,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-02-23 23:59:44,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:44,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 23:59:44,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:44,718 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:59:44,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:44,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699857499] [2022-02-23 23:59:44,719 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:44,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740807842] [2022-02-23 23:59:44,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740807842] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:59:44,719 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:59:44,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-23 23:59:44,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191249119] [2022-02-23 23:59:44,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:59:44,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:59:44,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:44,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:59:44,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-23 23:59:44,721 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:59:44,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:44,782 INFO L93 Difference]: Finished difference Result 42 states and 53 transitions. [2022-02-23 23:59:44,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:59:44,783 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 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 18 [2022-02-23 23:59:44,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:44,784 INFO L225 Difference]: With dead ends: 42 [2022-02-23 23:59:44,784 INFO L226 Difference]: Without dead ends: 40 [2022-02-23 23:59:44,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:59:44,785 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:44,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 90 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:59:44,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-23 23:59:44,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-02-23 23:59:44,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-23 23:59:44,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-02-23 23:59:44,794 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 18 [2022-02-23 23:59:44,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:44,794 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-02-23 23:59:44,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-02-23 23:59:44,795 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-02-23 23:59:44,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-23 23:59:44,795 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:44,795 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, 1, 1] [2022-02-23 23:59:44,821 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-02-23 23:59:45,015 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,SelfDestructingSolverStorable2 [2022-02-23 23:59:45,016 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:45,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1025358414, now seen corresponding path program 1 times [2022-02-23 23:59:45,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:45,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669695850] [2022-02-23 23:59:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:45,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:45,032 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:45,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755310253] [2022-02-23 23:59:45,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:45,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:45,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:45,038 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) [2022-02-23 23:59:45,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-02-23 23:59:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:45,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2022-02-23 23:59:45,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:45,397 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:59:45,658 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:45,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:45,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669695850] [2022-02-23 23:59:45,659 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:45,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755310253] [2022-02-23 23:59:45,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755310253] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:59:45,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:59:45,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-02-23 23:59:45,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598218397] [2022-02-23 23:59:45,660 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:59:45,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-23 23:59:45,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:45,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-23 23:59:45,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-02-23 23:59:45,663 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 23:59:46,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:46,082 INFO L93 Difference]: Finished difference Result 55 states and 72 transitions. [2022-02-23 23:59:46,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-23 23:59:46,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 24 [2022-02-23 23:59:46,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:46,085 INFO L225 Difference]: With dead ends: 55 [2022-02-23 23:59:46,085 INFO L226 Difference]: Without dead ends: 53 [2022-02-23 23:59:46,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2022-02-23 23:59:46,086 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:46,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 173 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 23:59:46,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-23 23:59:46,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2022-02-23 23:59:46,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 25 states have (on average 1.24) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2022-02-23 23:59:46,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2022-02-23 23:59:46,095 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 24 [2022-02-23 23:59:46,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:46,095 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2022-02-23 23:59:46,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 11 states have internal predecessors, (25), 4 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-02-23 23:59:46,095 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2022-02-23 23:59:46,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 23:59:46,096 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:46,096 INFO L514 BasicCegarLoop]: trace histogram [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] [2022-02-23 23:59:46,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-02-23 23:59:46,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:46,324 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:46,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:46,324 INFO L85 PathProgramCache]: Analyzing trace with hash -2117889998, now seen corresponding path program 1 times [2022-02-23 23:59:46,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:46,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708352080] [2022-02-23 23:59:46,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:46,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:46,335 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:46,335 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1013291928] [2022-02-23 23:59:46,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:46,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:46,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:46,337 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) [2022-02-23 23:59:46,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-02-23 23:59:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:46,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2022-02-23 23:59:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:46,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:59:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:46,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:46,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708352080] [2022-02-23 23:59:46,508 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:46,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013291928] [2022-02-23 23:59:46,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013291928] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:59:46,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:59:46,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-02-23 23:59:46,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685743787] [2022-02-23 23:59:46,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:59:46,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-23 23:59:46,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:46,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-23 23:59:46,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-02-23 23:59:46,510 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-23 23:59:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:46,575 INFO L93 Difference]: Finished difference Result 103 states and 123 transitions. [2022-02-23 23:59:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-23 23:59:46,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 27 [2022-02-23 23:59:46,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:46,577 INFO L225 Difference]: With dead ends: 103 [2022-02-23 23:59:46,577 INFO L226 Difference]: Without dead ends: 93 [2022-02-23 23:59:46,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:59:46,578 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 55 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:46,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 144 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:59:46,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-02-23 23:59:46,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 87. [2022-02-23 23:59:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 60 states have (on average 1.3333333333333333) internal successors, (80), 64 states have internal predecessors, (80), 16 states have call successors, (16), 12 states have call predecessors, (16), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-02-23 23:59:46,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 107 transitions. [2022-02-23 23:59:46,593 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 107 transitions. Word has length 27 [2022-02-23 23:59:46,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:46,593 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 107 transitions. [2022-02-23 23:59:46,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 8 states have internal predecessors, (35), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-02-23 23:59:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 107 transitions. [2022-02-23 23:59:46,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-23 23:59:46,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:46,594 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:59:46,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-02-23 23:59:46,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:46,809 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:46,809 INFO L85 PathProgramCache]: Analyzing trace with hash -2116787731, now seen corresponding path program 1 times [2022-02-23 23:59:46,809 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:46,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972417495] [2022-02-23 23:59:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:46,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:46,819 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:46,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [162753123] [2022-02-23 23:59:46,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:46,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:46,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:46,836 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) [2022-02-23 23:59:46,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-02-23 23:59:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:46,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 34 conjunts are in the unsatisfiable core [2022-02-23 23:59:46,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:47,637 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:47,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:59:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:48,940 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:48,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972417495] [2022-02-23 23:59:48,940 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:48,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162753123] [2022-02-23 23:59:48,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162753123] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:59:48,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:59:48,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 17 [2022-02-23 23:59:48,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79092621] [2022-02-23 23:59:48,941 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:59:48,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-23 23:59:48,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:48,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-23 23:59:48,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-02-23 23:59:48,942 INFO L87 Difference]: Start difference. First operand 87 states and 107 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 23:59:50,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:50,443 INFO L93 Difference]: Finished difference Result 127 states and 164 transitions. [2022-02-23 23:59:50,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-23 23:59:50,443 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-02-23 23:59:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:50,445 INFO L225 Difference]: With dead ends: 127 [2022-02-23 23:59:50,445 INFO L226 Difference]: Without dead ends: 121 [2022-02-23 23:59:50,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-23 23:59:50,446 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 75 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:50,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 246 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 325 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-23 23:59:50,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-02-23 23:59:50,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 79. [2022-02-23 23:59:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 59 states have internal predecessors, (75), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-02-23 23:59:50,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 96 transitions. [2022-02-23 23:59:50,468 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 96 transitions. Word has length 27 [2022-02-23 23:59:50,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:50,468 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 96 transitions. [2022-02-23 23:59:50,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 5 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 23:59:50,468 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 96 transitions. [2022-02-23 23:59:50,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-23 23:59:50,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:50,469 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, 1, 1] [2022-02-23 23:59:50,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-02-23 23:59:50,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:50,670 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:50,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash -410392694, now seen corresponding path program 1 times [2022-02-23 23:59:50,671 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:50,671 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977119720] [2022-02-23 23:59:50,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:50,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:50,681 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:50,681 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [609449753] [2022-02-23 23:59:50,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:50,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:50,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:50,682 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) [2022-02-23 23:59:50,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-02-23 23:59:50,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:50,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2022-02-23 23:59:50,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:50,793 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-02-23 23:59:50,794 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:59:50,794 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:50,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977119720] [2022-02-23 23:59:50,794 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:50,794 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609449753] [2022-02-23 23:59:50,794 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609449753] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:59:50,794 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:59:50,794 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-23 23:59:50,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362299726] [2022-02-23 23:59:50,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:59:50,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-23 23:59:50,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:50,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-23 23:59:50,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-02-23 23:59:50,796 INFO L87 Difference]: Start difference. First operand 79 states and 96 transitions. Second operand has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 23:59:50,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:50,895 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2022-02-23 23:59:50,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-23 23:59:50,896 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2022-02-23 23:59:50,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:50,897 INFO L225 Difference]: With dead ends: 116 [2022-02-23 23:59:50,897 INFO L226 Difference]: Without dead ends: 104 [2022-02-23 23:59:50,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-02-23 23:59:50,898 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 33 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:50,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 176 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:59:50,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-23 23:59:50,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 99. [2022-02-23 23:59:50,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 76 states have internal predecessors, (98), 15 states have call successors, (15), 11 states have call predecessors, (15), 9 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-02-23 23:59:50,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 125 transitions. [2022-02-23 23:59:50,913 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 125 transitions. Word has length 29 [2022-02-23 23:59:50,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:50,913 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 125 transitions. [2022-02-23 23:59:50,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2022-02-23 23:59:50,914 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 125 transitions. [2022-02-23 23:59:50,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 23:59:50,915 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:50,915 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:59:50,937 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-02-23 23:59:51,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:51,135 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:51,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:51,136 INFO L85 PathProgramCache]: Analyzing trace with hash 159893073, now seen corresponding path program 1 times [2022-02-23 23:59:51,136 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:51,136 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417102027] [2022-02-23 23:59:51,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:51,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:51,145 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:51,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [796759885] [2022-02-23 23:59:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:51,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:51,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:51,150 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) [2022-02-23 23:59:51,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-02-23 23:59:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:51,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 5 conjunts are in the unsatisfiable core [2022-02-23 23:59:51,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:59:51,283 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-02-23 23:59:51,283 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:51,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417102027] [2022-02-23 23:59:51,283 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:51,283 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796759885] [2022-02-23 23:59:51,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796759885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-23 23:59:51,284 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-23 23:59:51,284 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-23 23:59:51,284 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592823125] [2022-02-23 23:59:51,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:59:51,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-23 23:59:51,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:51,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-23 23:59:51,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-02-23 23:59:51,285 INFO L87 Difference]: Start difference. First operand 99 states and 125 transitions. Second operand has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 23:59:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:51,344 INFO L93 Difference]: Finished difference Result 141 states and 180 transitions. [2022-02-23 23:59:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-23 23:59:51,344 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 40 [2022-02-23 23:59:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:51,345 INFO L225 Difference]: With dead ends: 141 [2022-02-23 23:59:51,346 INFO L226 Difference]: Without dead ends: 129 [2022-02-23 23:59:51,346 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-23 23:59:51,347 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:51,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 152 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-23 23:59:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-23 23:59:51,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 113. [2022-02-23 23:59:51,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 85 states have (on average 1.2941176470588236) internal successors, (110), 87 states have internal predecessors, (110), 18 states have call successors, (18), 11 states have call predecessors, (18), 9 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-02-23 23:59:51,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 143 transitions. [2022-02-23 23:59:51,363 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 143 transitions. Word has length 40 [2022-02-23 23:59:51,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:51,364 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 143 transitions. [2022-02-23 23:59:51,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-02-23 23:59:51,364 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 143 transitions. [2022-02-23 23:59:51,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-23 23:59:51,365 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:51,365 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:59:51,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-02-23 23:59:51,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:51,589 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:51,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:51,589 INFO L85 PathProgramCache]: Analyzing trace with hash -837179280, now seen corresponding path program 1 times [2022-02-23 23:59:51,589 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:51,589 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728121119] [2022-02-23 23:59:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:51,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:51,598 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:51,598 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227398411] [2022-02-23 23:59:51,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:51,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:51,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:51,600 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) [2022-02-23 23:59:51,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-02-23 23:59:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-23 23:59:51,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 12 conjunts are in the unsatisfiable core [2022-02-23 23:59:51,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:51,763 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-02-23 23:59:51,788 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-02-23 23:59:51,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:59:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-02-23 23:59:51,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:51,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728121119] [2022-02-23 23:59:51,880 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:51,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227398411] [2022-02-23 23:59:51,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227398411] provided 1 perfect and 1 imperfect interpolant sequences [2022-02-23 23:59:51,880 INFO L191 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-02-23 23:59:51,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-02-23 23:59:51,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268590458] [2022-02-23 23:59:51,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-23 23:59:51,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-23 23:59:51,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:51,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-23 23:59:51,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2022-02-23 23:59:51,884 INFO L87 Difference]: Start difference. First operand 113 states and 143 transitions. Second operand has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-02-23 23:59:52,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:52,044 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2022-02-23 23:59:52,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-23 23:59:52,045 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 40 [2022-02-23 23:59:52,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:52,046 INFO L225 Difference]: With dead ends: 120 [2022-02-23 23:59:52,046 INFO L226 Difference]: Without dead ends: 100 [2022-02-23 23:59:52,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-02-23 23:59:52,047 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:52,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 126 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:59:52,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-23 23:59:52,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2022-02-23 23:59:52,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.2857142857142858) internal successors, (63), 50 states have internal predecessors, (63), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-23 23:59:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 79 transitions. [2022-02-23 23:59:52,060 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 79 transitions. Word has length 40 [2022-02-23 23:59:52,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:52,060 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 79 transitions. [2022-02-23 23:59:52,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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) [2022-02-23 23:59:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 79 transitions. [2022-02-23 23:59:52,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-23 23:59:52,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:52,062 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:59:52,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-02-23 23:59:52,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-02-23 23:59:52,276 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:52,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:52,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1169624165, now seen corresponding path program 2 times [2022-02-23 23:59:52,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:52,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816023819] [2022-02-23 23:59:52,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:52,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:52,284 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:52,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [774494376] [2022-02-23 23:59:52,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-02-23 23:59:52,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:52,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:52,286 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) [2022-02-23 23:59:52,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-02-23 23:59:52,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-02-23 23:59:52,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 23:59:52,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 13 conjunts are in the unsatisfiable core [2022-02-23 23:59:52,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:52,495 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:52,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:59:52,658 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-02-23 23:59:52,658 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:52,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816023819] [2022-02-23 23:59:52,659 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:52,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774494376] [2022-02-23 23:59:52,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774494376] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:59:52,659 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:59:52,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-02-23 23:59:52,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641879268] [2022-02-23 23:59:52,659 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:59:52,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-23 23:59:52,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:52,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-23 23:59:52,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-02-23 23:59:52,661 INFO L87 Difference]: Start difference. First operand 66 states and 79 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-23 23:59:52,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:52,812 INFO L93 Difference]: Finished difference Result 140 states and 177 transitions. [2022-02-23 23:59:52,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-23 23:59:52,813 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 54 [2022-02-23 23:59:52,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:52,814 INFO L225 Difference]: With dead ends: 140 [2022-02-23 23:59:52,814 INFO L226 Difference]: Without dead ends: 132 [2022-02-23 23:59:52,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-02-23 23:59:52,815 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 153 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:52,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 248 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-23 23:59:52,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-23 23:59:52,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-02-23 23:59:52,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 103 states have (on average 1.3106796116504855) internal successors, (135), 104 states have internal predecessors, (135), 15 states have call successors, (15), 14 states have call predecessors, (15), 13 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-02-23 23:59:52,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2022-02-23 23:59:52,827 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 54 [2022-02-23 23:59:52,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:52,827 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2022-02-23 23:59:52,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 12 states have call successors, (14), 8 states have call predecessors, (14), 7 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2022-02-23 23:59:52,828 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2022-02-23 23:59:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-23 23:59:52,829 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:52,829 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:59:52,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-02-23 23:59:53,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-02-23 23:59:53,047 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:53,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:53,048 INFO L85 PathProgramCache]: Analyzing trace with hash 93180219, now seen corresponding path program 3 times [2022-02-23 23:59:53,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:53,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288994534] [2022-02-23 23:59:53,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:53,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:53,070 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:53,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1360663752] [2022-02-23 23:59:53,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-02-23 23:59:53,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:53,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:53,076 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) [2022-02-23 23:59:53,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-02-23 23:59:53,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-02-23 23:59:53,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 23:59:53,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 25 conjunts are in the unsatisfiable core [2022-02-23 23:59:53,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:53,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:59:53,827 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 20 proven. 245 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-02-23 23:59:53,827 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:53,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288994534] [2022-02-23 23:59:53,827 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:53,827 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360663752] [2022-02-23 23:59:53,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360663752] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:59:53,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:59:53,828 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-02-23 23:59:53,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095623456] [2022-02-23 23:59:53,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:59:53,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-23 23:59:53,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:53,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-23 23:59:53,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=369, Unknown=0, NotChecked=0, Total=650 [2022-02-23 23:59:53,830 INFO L87 Difference]: Start difference. First operand 132 states and 163 transitions. Second operand has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-02-23 23:59:54,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:54,277 INFO L93 Difference]: Finished difference Result 272 states and 351 transitions. [2022-02-23 23:59:54,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-23 23:59:54,278 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) Word has length 108 [2022-02-23 23:59:54,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:54,282 INFO L225 Difference]: With dead ends: 272 [2022-02-23 23:59:54,282 INFO L226 Difference]: Without dead ends: 264 [2022-02-23 23:59:54,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=1366, Unknown=0, NotChecked=0, Total=2162 [2022-02-23 23:59:54,283 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 460 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:54,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 338 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-23 23:59:54,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-23 23:59:54,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-02-23 23:59:54,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 211 states have (on average 1.3222748815165877) internal successors, (279), 212 states have internal predecessors, (279), 27 states have call successors, (27), 26 states have call predecessors, (27), 25 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2022-02-23 23:59:54,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 331 transitions. [2022-02-23 23:59:54,305 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 331 transitions. Word has length 108 [2022-02-23 23:59:54,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:54,306 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 331 transitions. [2022-02-23 23:59:54,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.153846153846154) internal successors, (134), 26 states have internal predecessors, (134), 24 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 22 states have call predecessors, (24), 23 states have call successors, (24) [2022-02-23 23:59:54,306 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 331 transitions. [2022-02-23 23:59:54,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-02-23 23:59:54,308 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:54,308 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:59:54,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-02-23 23:59:54,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-02-23 23:59:54,532 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:54,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:54,533 INFO L85 PathProgramCache]: Analyzing trace with hash -477485957, now seen corresponding path program 4 times [2022-02-23 23:59:54,533 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:54,533 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366608401] [2022-02-23 23:59:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:54,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:54,547 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:54,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1800775909] [2022-02-23 23:59:54,547 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-02-23 23:59:54,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:54,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:54,548 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) [2022-02-23 23:59:54,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-02-23 23:59:54,748 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-02-23 23:59:54,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-02-23 23:59:54,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 49 conjunts are in the unsatisfiable core [2022-02-23 23:59:54,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-02-23 23:59:55,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 2123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-23 23:59:55,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-02-23 23:59:56,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2167 backedges. 44 proven. 1199 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-02-23 23:59:56,187 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-02-23 23:59:56,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366608401] [2022-02-23 23:59:56,187 WARN L317 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-02-23 23:59:56,187 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800775909] [2022-02-23 23:59:56,187 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800775909] provided 0 perfect and 2 imperfect interpolant sequences [2022-02-23 23:59:56,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-02-23 23:59:56,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-02-23 23:59:56,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276413322] [2022-02-23 23:59:56,188 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-02-23 23:59:56,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-23 23:59:56,189 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-02-23 23:59:56,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-23 23:59:56,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1133, Invalid=1317, Unknown=0, NotChecked=0, Total=2450 [2022-02-23 23:59:56,190 INFO L87 Difference]: Start difference. First operand 264 states and 331 transitions. Second operand has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-02-23 23:59:57,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-23 23:59:57,636 INFO L93 Difference]: Finished difference Result 536 states and 699 transitions. [2022-02-23 23:59:57,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-23 23:59:57,637 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) Word has length 216 [2022-02-23 23:59:57,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-23 23:59:57,640 INFO L225 Difference]: With dead ends: 536 [2022-02-23 23:59:57,640 INFO L226 Difference]: Without dead ends: 528 [2022-02-23 23:59:57,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 476 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1288 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3316, Invalid=5614, Unknown=0, NotChecked=0, Total=8930 [2022-02-23 23:59:57,643 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1371 mSDsluCounter, 551 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1371 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-23 23:59:57,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1371 Valid, 626 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-23 23:59:57,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-02-23 23:59:57,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2022-02-23 23:59:57,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 427 states have (on average 1.3278688524590163) internal successors, (567), 428 states have internal predecessors, (567), 51 states have call successors, (51), 50 states have call predecessors, (51), 49 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2022-02-23 23:59:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 667 transitions. [2022-02-23 23:59:57,679 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 667 transitions. Word has length 216 [2022-02-23 23:59:57,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-23 23:59:57,680 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 667 transitions. [2022-02-23 23:59:57,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 5.32) internal successors, (266), 50 states have internal predecessors, (266), 48 states have call successors, (50), 26 states have call predecessors, (50), 25 states have return successors, (48), 46 states have call predecessors, (48), 47 states have call successors, (48) [2022-02-23 23:59:57,680 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 667 transitions. [2022-02-23 23:59:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2022-02-23 23:59:57,706 INFO L506 BasicCegarLoop]: Found error trace [2022-02-23 23:59:57,707 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-23 23:59:57,737 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-02-23 23:59:57,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-02-23 23:59:57,915 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-23 23:59:57,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-23 23:59:57,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1977953019, now seen corresponding path program 5 times [2022-02-23 23:59:57,916 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-02-23 23:59:57,916 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465876769] [2022-02-23 23:59:57,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-23 23:59:57,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-23 23:59:57,941 ERROR L252 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-02-23 23:59:57,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664510877] [2022-02-23 23:59:57,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-02-23 23:59:57,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-02-23 23:59:57,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-23 23:59:57,942 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) [2022-02-23 23:59:57,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process