/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:56:07,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:56:07,087 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:56:07,121 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-30 22:56:07,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-30 22:56:07,122 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-30 22:56:07,123 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-30 22:56:07,142 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-30 22:56:07,143 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-30 22:56:07,146 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-30 22:56:07,147 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-30 22:56:07,148 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-30 22:56:07,148 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-30 22:56:07,150 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-30 22:56:07,151 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-30 22:56:07,153 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-30 22:56:07,153 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-30 22:56:07,154 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-30 22:56:07,157 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-30 22:56:07,159 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-30 22:56:07,159 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-30 22:56:07,161 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-30 22:56:07,162 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-30 22:56:07,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-30 22:56:07,164 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-30 22:56:07,168 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 22:56:07,169 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 22:56:07,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 22:56:07,173 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 22:56:07,201 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:56:07,201 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:56:07,201 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:56:07,201 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:56:07,202 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:56:07,202 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:56:07,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:56:07,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:56:07,202 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:56:07,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:56:07,202 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:56:07,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:56:07,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:56:07,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:56:07,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:56:07,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:56:07,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:56:07,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:56:07,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:56:07,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:56:07,204 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:56:07,204 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:56:07,204 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:56:07,204 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:56:07,397 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:56:07,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:56:07,433 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:56:07,434 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:56:07,439 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:56:07,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_5.c [2022-01-30 22:56:07,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/198199966/f18babbe7a7e489f9a3cd3d2c483d353/FLAGce20615d3 [2022-01-30 22:56:07,821 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:56:07,821 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_5.c [2022-01-30 22:56:07,826 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/198199966/f18babbe7a7e489f9a3cd3d2c483d353/FLAGce20615d3 [2022-01-30 22:56:08,261 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/198199966/f18babbe7a7e489f9a3cd3d2c483d353 [2022-01-30 22:56:08,262 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:56:08,264 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:56:08,265 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:56:08,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:56:08,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:56:08,268 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:56:08" (1/1) ... [2022-01-30 22:56:08,269 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2859817f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08, skipping insertion in model container [2022-01-30 22:56:08,269 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:56:08" (1/1) ... [2022-01-30 22:56:08,273 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:56:08,283 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:56:08,404 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_5.c[331,344] [2022-01-30 22:56:08,445 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:56:08,454 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:56:08,462 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_5.c[331,344] [2022-01-30 22:56:08,469 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:56:08,480 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:56:08,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08 WrapperNode [2022-01-30 22:56:08,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:56:08,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:56:08,481 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:56:08,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:56:08,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08" (1/1) ... [2022-01-30 22:56:08,490 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08" (1/1) ... [2022-01-30 22:56:08,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08" (1/1) ... [2022-01-30 22:56:08,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08" (1/1) ... [2022-01-30 22:56:08,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08" (1/1) ... [2022-01-30 22:56:08,501 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08" (1/1) ... [2022-01-30 22:56:08,502 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08" (1/1) ... [2022-01-30 22:56:08,504 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:56:08,505 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:56:08,505 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:56:08,505 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:56:08,508 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08" (1/1) ... [2022-01-30 22:56:08,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:56:08,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:08,532 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 22:56:08,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 22:56:08,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:56:08,601 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:56:08,601 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:56:08,601 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 22:56:08,602 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-30 22:56:08,603 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:56:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:56:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:56:08,603 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:56:08,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:56:08,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:56:08,647 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:56:08,648 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:56:08,742 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:56:08,745 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:56:08,746 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-30 22:56:08,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:56:08 BoogieIcfgContainer [2022-01-30 22:56:08,747 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:56:08,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:56:08,748 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:56:08,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:56:08,762 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:56:08" (1/3) ... [2022-01-30 22:56:08,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf8b6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:56:08, skipping insertion in model container [2022-01-30 22:56:08,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:56:08" (2/3) ... [2022-01-30 22:56:08,763 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bf8b6a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:56:08, skipping insertion in model container [2022-01-30 22:56:08,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:56:08" (3/3) ... [2022-01-30 22:56:08,764 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_5.c [2022-01-30 22:56:08,767 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:56:08,767 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:56:08,796 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:56:08,801 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:56:08,801 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:56:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:56:08,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 22:56:08,823 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:08,823 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:08,824 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:08,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2033071227, now seen corresponding path program 1 times [2022-01-30 22:56:08,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:08,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184291493] [2022-01-30 22:56:08,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:08,843 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:08,921 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:08,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551982928] [2022-01-30 22:56:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:08,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:08,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:08,925 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:56:08,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:56:08,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:56:08,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-30 22:56:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:09,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:56:09,032 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:56:09,032 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:09,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184291493] [2022-01-30 22:56:09,033 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:09,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551982928] [2022-01-30 22:56:09,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551982928] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:56:09,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:56:09,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-30 22:56:09,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713126044] [2022-01-30 22:56:09,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:56:09,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-30 22:56:09,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:09,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-30 22:56:09,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-30 22:56:09,056 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:56:09,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:09,067 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-01-30 22:56:09,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-30 22:56:09,068 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 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 20 [2022-01-30 22:56:09,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:09,072 INFO L225 Difference]: With dead ends: 57 [2022-01-30 22:56:09,072 INFO L226 Difference]: Without dead ends: 28 [2022-01-30 22:56:09,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-30 22:56:09,076 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:09,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:56:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-30 22:56:09,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-30 22:56:09,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:56:09,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-30 22:56:09,097 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-01-30 22:56:09,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:09,097 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-30 22:56:09,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:56:09,098 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-30 22:56:09,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 22:56:09,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:09,098 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:09,116 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-30 22:56:09,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-30 22:56:09,315 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:09,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:09,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2003730631, now seen corresponding path program 1 times [2022-01-30 22:56:09,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:09,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437472812] [2022-01-30 22:56:09,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:09,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:09,328 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:09,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [311255556] [2022-01-30 22:56:09,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:09,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:09,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:09,330 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:56:09,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:56:09,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:56:09,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:56:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:56:09,458 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:56:09,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:09,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437472812] [2022-01-30 22:56:09,459 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:09,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311255556] [2022-01-30 22:56:09,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311255556] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:56:09,459 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:56:09,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 22:56:09,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999716858] [2022-01-30 22:56:09,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:56:09,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 22:56:09,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:09,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 22:56:09,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:56:09,461 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-01-30 22:56:09,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:09,509 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2022-01-30 22:56:09,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 22:56:09,510 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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 20 [2022-01-30 22:56:09,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:09,515 INFO L225 Difference]: With dead ends: 53 [2022-01-30 22:56:09,515 INFO L226 Difference]: Without dead ends: 37 [2022-01-30 22:56:09,516 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:56:09,517 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:09,517 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:56:09,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-30 22:56:09,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2022-01-30 22:56:09,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:56:09,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-01-30 22:56:09,526 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2022-01-30 22:56:09,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:09,526 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-01-30 22:56:09,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-01-30 22:56:09,526 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-01-30 22:56:09,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-30 22:56:09,527 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:09,527 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:09,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-30 22:56:09,741 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,SelfDestructingSolverStorable1 [2022-01-30 22:56:09,741 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:09,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:09,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1543382071, now seen corresponding path program 1 times [2022-01-30 22:56:09,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:09,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80950571] [2022-01-30 22:56:09,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:09,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:09,754 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:09,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [434084640] [2022-01-30 22:56:09,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:09,754 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:09,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:09,755 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:56:09,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:56:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:56:09,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:56:09,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:09,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:56:09,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:56:09,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:56:09,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:09,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80950571] [2022-01-30 22:56:09,951 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:09,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434084640] [2022-01-30 22:56:09,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434084640] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:56:09,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:56:09,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-30 22:56:09,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179449425] [2022-01-30 22:56:09,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:56:09,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:56:09,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:09,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:56:09,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:56:09,956 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:56:10,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:10,089 INFO L93 Difference]: Finished difference Result 73 states and 95 transitions. [2022-01-30 22:56:10,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:56:10,089 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-01-30 22:56:10,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:10,093 INFO L225 Difference]: With dead ends: 73 [2022-01-30 22:56:10,093 INFO L226 Difference]: Without dead ends: 57 [2022-01-30 22:56:10,093 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-30 22:56:10,094 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 134 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:10,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 45 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:56:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-30 22:56:10,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2022-01-30 22:56:10,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.25) internal successors, (45), 36 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:56:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 52 transitions. [2022-01-30 22:56:10,103 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 52 transitions. Word has length 25 [2022-01-30 22:56:10,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:10,104 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 52 transitions. [2022-01-30 22:56:10,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:56:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 52 transitions. [2022-01-30 22:56:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-30 22:56:10,105 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:10,105 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:10,142 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:56:10,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:10,316 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:10,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:10,317 INFO L85 PathProgramCache]: Analyzing trace with hash 156886521, now seen corresponding path program 1 times [2022-01-30 22:56:10,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:10,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445516543] [2022-01-30 22:56:10,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:10,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:10,355 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:10,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [731065522] [2022-01-30 22:56:10,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:10,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:10,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:10,367 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:56:10,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:56:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:56:10,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-30 22:56:10,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:10,623 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:56:10,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:56:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:56:10,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:10,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445516543] [2022-01-30 22:56:10,744 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:10,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731065522] [2022-01-30 22:56:10,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731065522] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:56:10,745 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:56:10,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-30 22:56:10,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635028741] [2022-01-30 22:56:10,745 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:56:10,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 22:56:10,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:10,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 22:56:10,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-30 22:56:10,746 INFO L87 Difference]: Start difference. First operand 44 states and 52 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:56:10,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:10,963 INFO L93 Difference]: Finished difference Result 131 states and 180 transitions. [2022-01-30 22:56:10,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 22:56:10,964 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 40 [2022-01-30 22:56:10,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:10,965 INFO L225 Difference]: With dead ends: 131 [2022-01-30 22:56:10,965 INFO L226 Difference]: Without dead ends: 111 [2022-01-30 22:56:10,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-30 22:56:10,966 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 238 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:10,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 70 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:56:10,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-01-30 22:56:10,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 74. [2022-01-30 22:56:10,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:56:10,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2022-01-30 22:56:10,975 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 40 [2022-01-30 22:56:10,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:10,975 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2022-01-30 22:56:10,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:56:10,975 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2022-01-30 22:56:10,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-30 22:56:10,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:10,977 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:11,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:56:11,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:11,192 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:11,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:11,192 INFO L85 PathProgramCache]: Analyzing trace with hash -476238917, now seen corresponding path program 2 times [2022-01-30 22:56:11,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:11,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345316139] [2022-01-30 22:56:11,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:11,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:11,213 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:11,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [362160016] [2022-01-30 22:56:11,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:56:11,213 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:11,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:11,223 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) [2022-01-30 22:56:11,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:56:11,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-30 22:56:11,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:56:11,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-30 22:56:11,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2022-01-30 22:56:11,649 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:56:11,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345316139] [2022-01-30 22:56:11,650 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:11,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362160016] [2022-01-30 22:56:11,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362160016] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:56:11,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:56:11,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-30 22:56:11,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686952104] [2022-01-30 22:56:11,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:56:11,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-30 22:56:11,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:11,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-30 22:56:11,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-01-30 22:56:11,652 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:56:11,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:11,736 INFO L93 Difference]: Finished difference Result 88 states and 108 transitions. [2022-01-30 22:56:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:56:11,737 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 70 [2022-01-30 22:56:11,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:11,739 INFO L225 Difference]: With dead ends: 88 [2022-01-30 22:56:11,739 INFO L226 Difference]: Without dead ends: 86 [2022-01-30 22:56:11,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-30 22:56:11,742 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 43 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:11,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 98 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:56:11,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-01-30 22:56:11,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2022-01-30 22:56:11,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.2666666666666666) internal successors, (95), 75 states have internal predecessors, (95), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:56:11,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 106 transitions. [2022-01-30 22:56:11,770 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 106 transitions. Word has length 70 [2022-01-30 22:56:11,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:11,770 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 106 transitions. [2022-01-30 22:56:11,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:56:11,771 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 106 transitions. [2022-01-30 22:56:11,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-30 22:56:11,773 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:11,773 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:11,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-30 22:56:11,973 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:11,974 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:11,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:11,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1825589254, now seen corresponding path program 1 times [2022-01-30 22:56:11,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:11,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722942436] [2022-01-30 22:56:11,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:11,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:12,012 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:12,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813093700] [2022-01-30 22:56:12,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:12,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:12,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:12,032 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) [2022-01-30 22:56:12,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:56:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:56:12,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 22:56:12,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:56:12,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:56:12,662 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:56:12,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:12,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722942436] [2022-01-30 22:56:12,662 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:12,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813093700] [2022-01-30 22:56:12,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813093700] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:56:12,662 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:56:12,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-30 22:56:12,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076250601] [2022-01-30 22:56:12,663 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:56:12,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 22:56:12,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 22:56:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-30 22:56:12,666 INFO L87 Difference]: Start difference. First operand 86 states and 106 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:56:13,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:13,243 INFO L93 Difference]: Finished difference Result 440 states and 632 transitions. [2022-01-30 22:56:13,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:56:13,244 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 78 [2022-01-30 22:56:13,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:13,246 INFO L225 Difference]: With dead ends: 440 [2022-01-30 22:56:13,246 INFO L226 Difference]: Without dead ends: 393 [2022-01-30 22:56:13,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 22:56:13,247 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 605 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:13,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 147 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 22:56:13,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-30 22:56:13,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 146. [2022-01-30 22:56:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 135 states have (on average 1.2814814814814814) internal successors, (173), 135 states have internal predecessors, (173), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:56:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 184 transitions. [2022-01-30 22:56:13,283 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 184 transitions. Word has length 78 [2022-01-30 22:56:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:13,283 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 184 transitions. [2022-01-30 22:56:13,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:56:13,283 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 184 transitions. [2022-01-30 22:56:13,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-30 22:56:13,286 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:13,286 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:13,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-30 22:56:13,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:13,496 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:13,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:13,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1125932218, now seen corresponding path program 2 times [2022-01-30 22:56:13,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:13,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535377932] [2022-01-30 22:56:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:13,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:13,518 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:13,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1141115148] [2022-01-30 22:56:13,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:56:13,518 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:13,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:13,519 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) [2022-01-30 22:56:13,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:56:13,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:56:13,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:56:13,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-30 22:56:13,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:14,430 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:56:14,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:56:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 2 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:56:15,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:15,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535377932] [2022-01-30 22:56:15,206 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:15,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141115148] [2022-01-30 22:56:15,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141115148] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:56:15,206 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:56:15,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-30 22:56:15,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526217166] [2022-01-30 22:56:15,206 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:56:15,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 22:56:15,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:15,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 22:56:15,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 22:56:15,209 INFO L87 Difference]: Start difference. First operand 146 states and 184 transitions. Second operand has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:56:16,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:16,942 INFO L93 Difference]: Finished difference Result 878 states and 1280 transitions. [2022-01-30 22:56:16,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-30 22:56:16,943 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 138 [2022-01-30 22:56:16,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:16,946 INFO L225 Difference]: With dead ends: 878 [2022-01-30 22:56:16,946 INFO L226 Difference]: Without dead ends: 801 [2022-01-30 22:56:16,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-30 22:56:16,949 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 1114 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:16,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 254 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-30 22:56:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2022-01-30 22:56:17,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 266. [2022-01-30 22:56:17,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 255 states have (on average 1.2901960784313726) internal successors, (329), 255 states have internal predecessors, (329), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:56:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 340 transitions. [2022-01-30 22:56:17,037 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 340 transitions. Word has length 138 [2022-01-30 22:56:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:17,038 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 340 transitions. [2022-01-30 22:56:17,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:56:17,039 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 340 transitions. [2022-01-30 22:56:17,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-30 22:56:17,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:17,053 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:17,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-01-30 22:56:17,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:17,271 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:17,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:17,272 INFO L85 PathProgramCache]: Analyzing trace with hash -284584390, now seen corresponding path program 3 times [2022-01-30 22:56:17,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:17,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720272159] [2022-01-30 22:56:17,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:17,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:17,313 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:17,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [280598506] [2022-01-30 22:56:17,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:56:17,314 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:17,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:17,315 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) [2022-01-30 22:56:17,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:56:17,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 22:56:17,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:56:17,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 22:56:17,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-30 22:56:18,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:56:42,244 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5221 trivial. 0 not checked. [2022-01-30 22:56:42,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:56:42,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720272159] [2022-01-30 22:56:42,244 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:56:42,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280598506] [2022-01-30 22:56:42,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [280598506] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:56:42,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:56:42,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-01-30 22:56:42,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898428306] [2022-01-30 22:56:42,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:56:42,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-30 22:56:42,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:56:42,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-30 22:56:42,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=87, Unknown=8, NotChecked=0, Total=132 [2022-01-30 22:56:42,246 INFO L87 Difference]: Start difference. First operand 266 states and 340 transitions. Second operand has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-30 22:56:50,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:56:50,902 INFO L93 Difference]: Finished difference Result 288 states and 369 transitions. [2022-01-30 22:56:50,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-30 22:56:50,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 258 [2022-01-30 22:56:50,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:56:50,905 INFO L225 Difference]: With dead ends: 288 [2022-01-30 22:56:50,905 INFO L226 Difference]: Without dead ends: 286 [2022-01-30 22:56:50,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 505 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=79, Invalid=181, Unknown=12, NotChecked=0, Total=272 [2022-01-30 22:56:50,906 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 127 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:56:50,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 144 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:56:50,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-01-30 22:56:50,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 286. [2022-01-30 22:56:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 270 states have (on average 1.288888888888889) internal successors, (348), 270 states have internal predecessors, (348), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-30 22:56:50,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 367 transitions. [2022-01-30 22:56:50,932 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 367 transitions. Word has length 258 [2022-01-30 22:56:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:56:50,933 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 367 transitions. [2022-01-30 22:56:50,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.9) internal successors, (49), 11 states have internal predecessors, (49), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-30 22:56:50,934 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 367 transitions. [2022-01-30 22:56:50,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-01-30 22:56:50,936 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:56:50,936 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 23, 23, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:56:50,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:56:51,141 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,SelfDestructingSolverStorable7 [2022-01-30 22:56:51,142 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:56:51,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:56:51,142 INFO L85 PathProgramCache]: Analyzing trace with hash 770830646, now seen corresponding path program 4 times [2022-01-30 22:56:51,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:56:51,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736614342] [2022-01-30 22:56:51,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:56:51,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:56:51,177 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:56:51,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544852865] [2022-01-30 22:56:51,177 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:56:51,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:56:51,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:56:51,192 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) [2022-01-30 22:56:51,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:56:57,796 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-30 22:56:57,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:56:57,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 812 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-30 22:56:57,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:56:59,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2022-01-30 22:56:59,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:57:02,333 INFO L134 CoverageAnalysis]: Checked inductivity of 5326 backedges. 10 proven. 5221 refuted. 0 times theorem prover too weak. 95 trivial. 0 not checked. [2022-01-30 22:57:02,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:57:02,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736614342] [2022-01-30 22:57:02,334 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:57:02,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544852865] [2022-01-30 22:57:02,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544852865] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:57:02,334 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:57:02,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-30 22:57:02,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772703460] [2022-01-30 22:57:02,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:57:02,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-30 22:57:02,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:57:02,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-30 22:57:02,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-30 22:57:02,339 INFO L87 Difference]: Start difference. First operand 286 states and 367 transitions. Second operand has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:57:12,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:57:12,152 INFO L93 Difference]: Finished difference Result 3222 states and 4770 transitions. [2022-01-30 22:57:12,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-30 22:57:12,154 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 290 [2022-01-30 22:57:12,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:57:12,166 INFO L225 Difference]: With dead ends: 3222 [2022-01-30 22:57:12,166 INFO L226 Difference]: Without dead ends: 3065 [2022-01-30 22:57:12,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 626 GetRequests, 483 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-30 22:57:12,172 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 2929 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 1207 mSolverCounterSat, 1141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2976 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1141 IncrementalHoareTripleChecker+Valid, 1207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:57:12,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2976 Valid, 446 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1141 Valid, 1207 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-30 22:57:12,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3065 states. [2022-01-30 22:57:12,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3065 to 526. [2022-01-30 22:57:12,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 526 states, 510 states have (on average 1.2941176470588236) internal successors, (660), 510 states have internal predecessors, (660), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-30 22:57:12,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 679 transitions. [2022-01-30 22:57:12,263 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 679 transitions. Word has length 290 [2022-01-30 22:57:12,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:57:12,263 INFO L470 AbstractCegarLoop]: Abstraction has 526 states and 679 transitions. [2022-01-30 22:57:12,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:57:12,264 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 679 transitions. [2022-01-30 22:57:12,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-30 22:57:12,269 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:57:12,270 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 47, 47, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:57:12,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-01-30 22:57:12,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:12,484 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:57:12,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:57:12,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1283466294, now seen corresponding path program 5 times [2022-01-30 22:57:12,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:57:12,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576231977] [2022-01-30 22:57:12,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:57:12,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:57:12,538 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:57:12,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [138910409] [2022-01-30 22:57:12,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-30 22:57:12,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:57:12,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:57:12,552 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) [2022-01-30 22:57:12,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process