/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-fpi/nsqm-if.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 01:22:19,497 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 01:22:19,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 01:22:19,559 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 01:22:19,565 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 01:22:19,566 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 01:22:19,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 01:22:19,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 01:22:19,568 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 01:22:19,568 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 01:22:19,569 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 01:22:19,570 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 01:22:19,571 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 01:22:19,572 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 01:22:19,573 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 01:22:19,573 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 01:22:19,575 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 01:22:19,580 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 01:22:19,581 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 01:22:19,581 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 01:22:19,582 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-31 01:22:19,595 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 01:22:19,595 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 01:22:19,596 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-31 01:22:19,596 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-31 01:22:19,596 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-31 01:22:19,597 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-31 01:22:19,597 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-31 01:22:19,597 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-31 01:22:19,597 INFO L138 SettingsManager]: * Use SBE=true [2022-01-31 01:22:19,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 01:22:19,598 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 01:22:19,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 01:22:19,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 01:22:19,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 01:22:19,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 01:22:19,598 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 01:22:19,598 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 01:22:19,599 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 01:22:19,599 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 01:22:19,599 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 01:22:19,599 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 01:22:19,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 01:22:19,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 01:22:19,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 01:22:19,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 01:22:19,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 01:22:19,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-31 01:22:19,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-31 01:22:19,600 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-31 01:22:19,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-31 01:22:19,600 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-31 01:22:19,601 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-31 01:22:19,601 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 01:22:19,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 01:22:19,806 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 01:22:19,831 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 01:22:19,833 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 01:22:19,834 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 01:22:19,836 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 01:22:19,837 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/nsqm-if.c [2022-01-31 01:22:19,880 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39e26dc6c/e941997c02c44d6e983bf2b85a3f321f/FLAG720b6ece9 [2022-01-31 01:22:20,271 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 01:22:20,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/nsqm-if.c [2022-01-31 01:22:20,280 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39e26dc6c/e941997c02c44d6e983bf2b85a3f321f/FLAG720b6ece9 [2022-01-31 01:22:20,688 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39e26dc6c/e941997c02c44d6e983bf2b85a3f321f [2022-01-31 01:22:20,690 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 01:22:20,691 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 01:22:20,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 01:22:20,693 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 01:22:20,695 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 01:22:20,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:22:20" (1/1) ... [2022-01-31 01:22:20,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78b62651 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20, skipping insertion in model container [2022-01-31 01:22:20,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 01:22:20" (1/1) ... [2022-01-31 01:22:20,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 01:22:20,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 01:22:20,850 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-fpi/nsqm-if.c[590,603] [2022-01-31 01:22:20,875 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 01:22:20,882 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 01:22:20,892 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-fpi/nsqm-if.c[590,603] [2022-01-31 01:22:20,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 01:22:20,918 INFO L208 MainTranslator]: Completed translation [2022-01-31 01:22:20,919 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20 WrapperNode [2022-01-31 01:22:20,919 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 01:22:20,920 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 01:22:20,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 01:22:20,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 01:22:20,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20" (1/1) ... [2022-01-31 01:22:20,927 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20" (1/1) ... [2022-01-31 01:22:20,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20" (1/1) ... [2022-01-31 01:22:20,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20" (1/1) ... [2022-01-31 01:22:20,948 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20" (1/1) ... [2022-01-31 01:22:20,951 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20" (1/1) ... [2022-01-31 01:22:20,952 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20" (1/1) ... [2022-01-31 01:22:20,953 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 01:22:20,954 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 01:22:20,954 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 01:22:20,954 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 01:22:20,959 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20" (1/1) ... [2022-01-31 01:22:20,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 01:22:20,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:22:20,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 01:22:21,008 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 01:22:21,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 01:22:21,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 01:22:21,034 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 01:22:21,034 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 01:22:21,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 01:22:21,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 01:22:21,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 01:22:21,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 01:22:21,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 01:22:21,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 01:22:21,037 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 01:22:21,099 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 01:22:21,101 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 01:22:21,211 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 01:22:21,215 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 01:22:21,215 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-01-31 01:22:21,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:22:21 BoogieIcfgContainer [2022-01-31 01:22:21,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 01:22:21,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 01:22:21,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 01:22:21,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 01:22:21,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 01:22:20" (1/3) ... [2022-01-31 01:22:21,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4948e2da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:22:21, skipping insertion in model container [2022-01-31 01:22:21,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 01:22:20" (2/3) ... [2022-01-31 01:22:21,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4948e2da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 01:22:21, skipping insertion in model container [2022-01-31 01:22:21,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 01:22:21" (3/3) ... [2022-01-31 01:22:21,234 INFO L111 eAbstractionObserver]: Analyzing ICFG nsqm-if.c [2022-01-31 01:22:21,237 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-31 01:22:21,237 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 01:22:21,282 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 01:22:21,286 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-31 01:22:21,287 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 01:22:21,327 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 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) [2022-01-31 01:22:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 01:22:21,331 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:22:21,332 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] [2022-01-31 01:22:21,332 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:22:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:22:21,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1482202103, now seen corresponding path program 1 times [2022-01-31 01:22:21,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:22:21,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420451108] [2022-01-31 01:22:21,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:21,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:22:21,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:21,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:22:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:21,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:22:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:22:21,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:22:21,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420451108] [2022-01-31 01:22:21,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420451108] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:22:21,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:22:21,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 01:22:21,577 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870617813] [2022-01-31 01:22:21,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:22:21,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 01:22:21,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:22:21,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 01:22:21,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 01:22:21,612 INFO L87 Difference]: Start difference. First operand has 36 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 27 states have internal predecessors, (38), 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 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:21,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:22:21,693 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2022-01-31 01:22:21,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 01:22:21,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2022-01-31 01:22:21,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:22:21,703 INFO L225 Difference]: With dead ends: 62 [2022-01-31 01:22:21,703 INFO L226 Difference]: Without dead ends: 31 [2022-01-31 01:22:21,707 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 01:22:21,712 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:22:21,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:22:21,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-01-31 01:22:21,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-01-31 01:22:21,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 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) [2022-01-31 01:22:21,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-01-31 01:22:21,742 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2022-01-31 01:22:21,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:22:21,742 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-01-31 01:22:21,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:21,743 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-01-31 01:22:21,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-31 01:22:21,744 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:22:21,744 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] [2022-01-31 01:22:21,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 01:22:21,745 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:22:21,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:22:21,746 INFO L85 PathProgramCache]: Analyzing trace with hash -539484107, now seen corresponding path program 1 times [2022-01-31 01:22:21,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:22:21,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425783108] [2022-01-31 01:22:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:21,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:22:21,775 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:22:21,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1363796787] [2022-01-31 01:22:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:21,775 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:22:21,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:22:21,778 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:22:21,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-31 01:22:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:21,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-31 01:22:21,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:22:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:22:21,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 01:22:21,956 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:22:21,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425783108] [2022-01-31 01:22:21,956 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:22:21,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363796787] [2022-01-31 01:22:21,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363796787] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:22:21,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:22:21,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 01:22:21,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224274345] [2022-01-31 01:22:21,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:22:21,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 01:22:21,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:22:21,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 01:22:21,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 01:22:21,959 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:22:22,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:22:22,018 INFO L93 Difference]: Finished difference Result 56 states and 67 transitions. [2022-01-31 01:22:22,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 01:22:22,019 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-01-31 01:22:22,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:22:22,020 INFO L225 Difference]: With dead ends: 56 [2022-01-31 01:22:22,020 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 01:22:22,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-31 01:22:22,021 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:22:22,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 39 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:22:22,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 01:22:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2022-01-31 01:22:22,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 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) [2022-01-31 01:22:22,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-01-31 01:22:22,029 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2022-01-31 01:22:22,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:22:22,029 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-01-31 01:22:22,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 01:22:22,030 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-01-31 01:22:22,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 01:22:22,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:22:22,030 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, 1, 1, 1] [2022-01-31 01:22:22,051 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-31 01:22:22,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:22:22,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:22:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:22:22,250 INFO L85 PathProgramCache]: Analyzing trace with hash 393970846, now seen corresponding path program 1 times [2022-01-31 01:22:22,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:22:22,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239321687] [2022-01-31 01:22:22,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:22,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:22:22,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:22,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 01:22:22,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:22,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-01-31 01:22:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:22,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 01:22:22,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:22:22,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239321687] [2022-01-31 01:22:22,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239321687] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:22:22,328 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:22:22,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 01:22:22,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307342773] [2022-01-31 01:22:22,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:22:22,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 01:22:22,329 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:22:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 01:22:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 01:22:22,330 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:22,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:22:22,402 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-01-31 01:22:22,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 01:22:22,402 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 01:22:22,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:22:22,403 INFO L225 Difference]: With dead ends: 60 [2022-01-31 01:22:22,403 INFO L226 Difference]: Without dead ends: 41 [2022-01-31 01:22:22,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 01:22:22,404 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 13 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:22:22,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 39 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:22:22,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-01-31 01:22:22,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 35. [2022-01-31 01:22:22,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 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) [2022-01-31 01:22:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-01-31 01:22:22,409 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2022-01-31 01:22:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:22:22,410 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-01-31 01:22:22,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:22,410 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-01-31 01:22:22,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 01:22:22,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:22:22,411 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, 1, 1, 1] [2022-01-31 01:22:22,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 01:22:22,411 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:22:22,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:22:22,411 INFO L85 PathProgramCache]: Analyzing trace with hash -286087524, now seen corresponding path program 1 times [2022-01-31 01:22:22,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:22:22,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480393254] [2022-01-31 01:22:22,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:22,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:22:22,460 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:22:22,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994161343] [2022-01-31 01:22:22,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:22,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:22:22,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:22:22,476 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:22:22,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-31 01:22:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:22,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-31 01:22:22,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:22:22,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 01:22:22,677 INFO L353 Elim1Store]: treesize reduction 48, result has 5.9 percent of original size [2022-01-31 01:22:22,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 29 [2022-01-31 01:22:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 01:22:22,721 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 01:22:22,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:22:22,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480393254] [2022-01-31 01:22:22,722 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:22:22,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994161343] [2022-01-31 01:22:22,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994161343] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:22:22,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:22:22,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 01:22:22,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28116653] [2022-01-31 01:22:22,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:22:22,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 01:22:22,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:22:22,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 01:22:22,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-01-31 01:22:22,726 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:22,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:22:22,823 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2022-01-31 01:22:22,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 01:22:22,823 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2022-01-31 01:22:22,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:22:22,824 INFO L225 Difference]: With dead ends: 53 [2022-01-31 01:22:22,824 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 01:22:22,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-01-31 01:22:22,826 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 12 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:22:22,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 133 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:22:22,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 01:22:22,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2022-01-31 01:22:22,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 35 states have internal predecessors, (40), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 01:22:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2022-01-31 01:22:22,833 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 28 [2022-01-31 01:22:22,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:22:22,833 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2022-01-31 01:22:22,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2022-01-31 01:22:22,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 01:22:22,834 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:22:22,834 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:22:22,858 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-31 01:22:23,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-01-31 01:22:23,059 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:22:23,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:22:23,062 INFO L85 PathProgramCache]: Analyzing trace with hash -408220957, now seen corresponding path program 1 times [2022-01-31 01:22:23,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:22:23,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475542747] [2022-01-31 01:22:23,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:23,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:22:23,078 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:22:23,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689877035] [2022-01-31 01:22:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:23,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:22:23,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:22:23,088 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:22:23,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-31 01:22:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:23,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 01:22:23,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:22:23,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:22:23,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:22:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:22:23,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:22:23,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475542747] [2022-01-31 01:22:23,281 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:22:23,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689877035] [2022-01-31 01:22:23,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689877035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:22:23,281 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:22:23,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-31 01:22:23,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688988208] [2022-01-31 01:22:23,281 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:22:23,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 01:22:23,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:22:23,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 01:22:23,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-31 01:22:23,283 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:23,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:22:23,400 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2022-01-31 01:22:23,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 01:22:23,400 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 31 [2022-01-31 01:22:23,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:22:23,401 INFO L225 Difference]: With dead ends: 90 [2022-01-31 01:22:23,401 INFO L226 Difference]: Without dead ends: 51 [2022-01-31 01:22:23,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-31 01:22:23,402 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:22:23,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 94 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:22:23,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-01-31 01:22:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 39. [2022-01-31 01:22:23,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 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) [2022-01-31 01:22:23,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2022-01-31 01:22:23,406 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 31 [2022-01-31 01:22:23,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:22:23,407 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2022-01-31 01:22:23,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:23,407 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2022-01-31 01:22:23,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-31 01:22:23,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:22:23,407 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:22:23,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-31 01:22:23,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:22:23,623 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:22:23,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:22:23,624 INFO L85 PathProgramCache]: Analyzing trace with hash 468092377, now seen corresponding path program 1 times [2022-01-31 01:22:23,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:22:23,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592643579] [2022-01-31 01:22:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:23,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:22:23,648 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:22:23,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [345036571] [2022-01-31 01:22:23,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:23,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:22:23,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:22:23,664 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:22:23,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-31 01:22:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:23,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 23 conjunts are in the unsatisfiable core [2022-01-31 01:22:23,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:22:23,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 01:22:23,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:22:23,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 01:22:23,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:22:23,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:22:23,898 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:22:23,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 29 [2022-01-31 01:22:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 01:22:23,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:22:24,165 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2022-01-31 01:22:24,218 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 01:22:24,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:22:24,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592643579] [2022-01-31 01:22:24,219 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:22:24,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345036571] [2022-01-31 01:22:24,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345036571] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:22:24,219 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:22:24,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-01-31 01:22:24,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042660934] [2022-01-31 01:22:24,219 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:22:24,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 01:22:24,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:22:24,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 01:22:24,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-01-31 01:22:24,221 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:50,644 WARN L228 SmtUtils]: Spent 26.15s on a formula simplification that was a NOOP. DAG size: 40 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:22:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:22:50,728 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2022-01-31 01:22:50,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 01:22:50,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 34 [2022-01-31 01:22:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:22:50,730 INFO L225 Difference]: With dead ends: 96 [2022-01-31 01:22:50,730 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 01:22:50,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2022-01-31 01:22:50,731 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 47 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 01:22:50,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 238 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 203 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-01-31 01:22:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 01:22:50,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2022-01-31 01:22:50,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 45 states have internal predecessors, (52), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 01:22:50,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2022-01-31 01:22:50,751 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 34 [2022-01-31 01:22:50,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:22:50,752 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2022-01-31 01:22:50,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.142857142857143) internal successors, (44), 15 states have internal predecessors, (44), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:50,752 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2022-01-31 01:22:50,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-31 01:22:50,752 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:22:50,753 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:22:50,786 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-01-31 01:22:50,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:22:50,970 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:22:50,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:22:50,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1421159097, now seen corresponding path program 2 times [2022-01-31 01:22:50,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:22:50,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063724745] [2022-01-31 01:22:50,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:50,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:22:50,992 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:22:50,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [685401047] [2022-01-31 01:22:50,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 01:22:50,993 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:22:50,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:22:50,999 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) [2022-01-31 01:22:51,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-31 01:22:51,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 01:22:51,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:22:51,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 01:22:51,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:22:51,166 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 01:22:51,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:22:51,257 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 19 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-31 01:22:51,257 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:22:51,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063724745] [2022-01-31 01:22:51,257 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:22:51,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685401047] [2022-01-31 01:22:51,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685401047] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:22:51,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:22:51,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 01:22:51,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029645734] [2022-01-31 01:22:51,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:22:51,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 01:22:51,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:22:51,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 01:22:51,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 01:22:51,259 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:51,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:22:51,412 INFO L93 Difference]: Finished difference Result 131 states and 152 transitions. [2022-01-31 01:22:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 01:22:51,412 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2022-01-31 01:22:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:22:51,414 INFO L225 Difference]: With dead ends: 131 [2022-01-31 01:22:51,414 INFO L226 Difference]: Without dead ends: 100 [2022-01-31 01:22:51,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-01-31 01:22:51,415 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 84 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:22:51,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 105 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:22:51,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-31 01:22:51,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2022-01-31 01:22:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 68 states have (on average 1.1764705882352942) internal successors, (80), 69 states have internal predecessors, (80), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 01:22:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2022-01-31 01:22:51,426 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 40 [2022-01-31 01:22:51,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:22:51,426 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2022-01-31 01:22:51,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 12 states have internal predecessors, (40), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:22:51,426 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2022-01-31 01:22:51,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-01-31 01:22:51,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:22:51,427 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:22:51,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-31 01:22:51,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:22:51,645 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:22:51,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:22:51,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1462132655, now seen corresponding path program 1 times [2022-01-31 01:22:51,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:22:51,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654143142] [2022-01-31 01:22:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:51,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:22:51,657 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:22:51,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [271193869] [2022-01-31 01:22:51,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:22:51,658 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:22:51,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:22:51,659 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) [2022-01-31 01:22:51,660 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-31 01:22:51,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 01:22:51,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 39 conjunts are in the unsatisfiable core [2022-01-31 01:22:51,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:22:51,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 01:22:51,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 01:22:51,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:22:51,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 01:22:51,893 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 01:22:51,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:22:51,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 35 [2022-01-31 01:22:53,254 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:22:53,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:22:53,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:22:53,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 35 [2022-01-31 01:22:53,302 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:22:53,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:23:02,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:23:02,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:23:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654143142] [2022-01-31 01:23:02,331 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:23:02,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271193869] [2022-01-31 01:23:02,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [271193869] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:23:02,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:23:02,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2022-01-31 01:23:02,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288254162] [2022-01-31 01:23:02,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:23:02,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 01:23:02,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:23:02,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 01:23:02,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=547, Unknown=5, NotChecked=0, Total=650 [2022-01-31 01:23:02,333 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 25 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 01:23:19,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:23:19,104 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2022-01-31 01:23:19,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 01:23:19,105 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 25 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 42 [2022-01-31 01:23:19,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:23:19,106 INFO L225 Difference]: With dead ends: 208 [2022-01-31 01:23:19,106 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 01:23:19,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=189, Invalid=994, Unknown=7, NotChecked=0, Total=1190 [2022-01-31 01:23:19,107 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 169 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 01:23:19,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 315 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 333 Invalid, 0 Unknown, 169 Unchecked, 0.9s Time] [2022-01-31 01:23:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 01:23:19,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2022-01-31 01:23:19,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 89 states have (on average 1.1685393258426966) internal successors, (104), 90 states have internal predecessors, (104), 7 states have call successors, (7), 7 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 01:23:19,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2022-01-31 01:23:19,116 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 42 [2022-01-31 01:23:19,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:23:19,116 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2022-01-31 01:23:19,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 25 states have internal predecessors, (58), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 01:23:19,116 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2022-01-31 01:23:19,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 01:23:19,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:23:19,117 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:23:19,156 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-31 01:23:19,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:23:19,318 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:23:19,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:23:19,318 INFO L85 PathProgramCache]: Analyzing trace with hash 1901438083, now seen corresponding path program 3 times [2022-01-31 01:23:19,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:23:19,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446242801] [2022-01-31 01:23:19,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:23:19,319 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:23:19,334 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:23:19,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1616466157] [2022-01-31 01:23:19,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 01:23:19,335 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:23:19,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:23:19,336 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) [2022-01-31 01:23:19,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-31 01:23:19,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 01:23:19,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:23:19,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 10 conjunts are in the unsatisfiable core [2022-01-31 01:23:19,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:23:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:23:19,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:23:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:23:19,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:23:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446242801] [2022-01-31 01:23:19,752 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:23:19,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616466157] [2022-01-31 01:23:19,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616466157] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:23:19,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:23:19,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2022-01-31 01:23:19,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051825299] [2022-01-31 01:23:19,752 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:23:19,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 01:23:19,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:23:19,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 01:23:19,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2022-01-31 01:23:19,753 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:23:20,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:23:20,048 INFO L93 Difference]: Finished difference Result 193 states and 226 transitions. [2022-01-31 01:23:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 01:23:20,049 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 43 [2022-01-31 01:23:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:23:20,050 INFO L225 Difference]: With dead ends: 193 [2022-01-31 01:23:20,050 INFO L226 Difference]: Without dead ends: 158 [2022-01-31 01:23:20,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=394, Unknown=0, NotChecked=0, Total=552 [2022-01-31 01:23:20,051 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 100 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 01:23:20,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 166 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 01:23:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-31 01:23:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 134. [2022-01-31 01:23:20,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 117 states have (on average 1.1794871794871795) internal successors, (138), 119 states have internal predecessors, (138), 10 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 01:23:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 155 transitions. [2022-01-31 01:23:20,062 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 155 transitions. Word has length 43 [2022-01-31 01:23:20,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:23:20,062 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 155 transitions. [2022-01-31 01:23:20,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2) internal successors, (48), 15 states have internal predecessors, (48), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:23:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 155 transitions. [2022-01-31 01:23:20,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 01:23:20,064 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:23:20,064 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:23:20,106 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-31 01:23:20,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:23:20,280 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:23:20,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:23:20,280 INFO L85 PathProgramCache]: Analyzing trace with hash -938320263, now seen corresponding path program 4 times [2022-01-31 01:23:20,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:23:20,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323267724] [2022-01-31 01:23:20,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:23:20,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:23:20,295 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:23:20,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450736776] [2022-01-31 01:23:20,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 01:23:20,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:23:20,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:23:20,308 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) [2022-01-31 01:23:20,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-31 01:23:20,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 01:23:20,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:23:20,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-31 01:23:20,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:23:20,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-01-31 01:23:20,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-31 01:23:20,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:20,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:20,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:20,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 63 [2022-01-31 01:23:20,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:20,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-31 01:23:20,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 52 [2022-01-31 01:23:20,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:20,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:20,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 63 [2022-01-31 01:23:20,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:20,916 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 17 [2022-01-31 01:23:20,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:20,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-01-31 01:23:21,033 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:23:21,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:21,036 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:23:21,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 29 [2022-01-31 01:23:21,074 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-31 01:23:21,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:23:21,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 45 [2022-01-31 01:23:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 01:23:21,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:23:21,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323267724] [2022-01-31 01:23:21,988 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:23:21,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450736776] [2022-01-31 01:23:21,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450736776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:23:21,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:23:21,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2022-01-31 01:23:21,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060749257] [2022-01-31 01:23:21,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:23:21,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 01:23:21,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:23:21,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 01:23:21,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=399, Unknown=0, NotChecked=0, Total=506 [2022-01-31 01:23:21,989 INFO L87 Difference]: Start difference. First operand 134 states and 155 transitions. Second operand has 23 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 22 states have internal predecessors, (59), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:23:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:23:22,759 INFO L93 Difference]: Finished difference Result 316 states and 376 transitions. [2022-01-31 01:23:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 01:23:22,759 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 22 states have internal predecessors, (59), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 46 [2022-01-31 01:23:22,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:23:22,760 INFO L225 Difference]: With dead ends: 316 [2022-01-31 01:23:22,761 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 01:23:22,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2022-01-31 01:23:22,762 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 76 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 01:23:22,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 262 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 322 Invalid, 0 Unknown, 109 Unchecked, 0.3s Time] [2022-01-31 01:23:22,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 01:23:22,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 161. [2022-01-31 01:23:22,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 142 states have (on average 1.204225352112676) internal successors, (171), 145 states have internal predecessors, (171), 11 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (8), 6 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 01:23:22,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 190 transitions. [2022-01-31 01:23:22,783 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 190 transitions. Word has length 46 [2022-01-31 01:23:22,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:23:22,783 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 190 transitions. [2022-01-31 01:23:22,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.8095238095238093) internal successors, (59), 22 states have internal predecessors, (59), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-31 01:23:22,783 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 190 transitions. [2022-01-31 01:23:22,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-31 01:23:22,784 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:23:22,784 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:23:22,817 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-01-31 01:23:23,018 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,SelfDestructingSolverStorable9 [2022-01-31 01:23:23,019 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:23:23,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:23:23,019 INFO L85 PathProgramCache]: Analyzing trace with hash -213420078, now seen corresponding path program 2 times [2022-01-31 01:23:23,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:23:23,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216953204] [2022-01-31 01:23:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:23:23,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:23:23,040 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:23:23,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1238138348] [2022-01-31 01:23:23,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-31 01:23:23,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:23:23,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:23:23,053 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) [2022-01-31 01:23:23,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-31 01:23:23,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-31 01:23:23,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:23:23,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 47 conjunts are in the unsatisfiable core [2022-01-31 01:23:23,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:23:23,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 01:23:23,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 01:23:23,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 01:23:23,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 61 [2022-01-31 01:23:23,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 24 [2022-01-31 01:23:23,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 01:23:23,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 01:23:23,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 143 treesize of output 131 [2022-01-31 01:23:23,608 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:23:23,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 159 [2022-01-31 01:23:23,717 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:23:23,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 66 [2022-01-31 01:23:23,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:23,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 47 [2022-01-31 01:23:25,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:25,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:25,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:23:25,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:23:25,435 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 35 [2022-01-31 01:23:25,489 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:23:25,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:23:41,999 INFO L353 Elim1Store]: treesize reduction 113, result has 35.4 percent of original size [2022-01-31 01:23:41,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 3 case distinctions, treesize of input 1300 treesize of output 881 [2022-01-31 01:23:42,010 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:23:42,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 921 treesize of output 883 [2022-01-31 01:24:17,133 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:17,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:17,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:17,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:17,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:17,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:17,823 INFO L353 Elim1Store]: treesize reduction 28, result has 50.9 percent of original size [2022-01-31 01:24:17,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 519 treesize of output 445 [2022-01-31 01:24:18,278 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:24:18,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:24:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216953204] [2022-01-31 01:24:18,278 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:24:18,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238138348] [2022-01-31 01:24:18,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238138348] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:24:18,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:24:18,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 32 [2022-01-31 01:24:18,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487126508] [2022-01-31 01:24:18,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:24:18,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 01:24:18,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:24:18,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 01:24:18,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=844, Unknown=9, NotChecked=0, Total=992 [2022-01-31 01:24:18,280 INFO L87 Difference]: Start difference. First operand 161 states and 190 transitions. Second operand has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 01:24:18,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:24:18,987 INFO L93 Difference]: Finished difference Result 365 states and 437 transitions. [2022-01-31 01:24:18,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 01:24:18,998 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 48 [2022-01-31 01:24:18,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:24:19,000 INFO L225 Difference]: With dead ends: 365 [2022-01-31 01:24:19,000 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 01:24:19,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 18.1s TimeCoverageRelationStatistics Valid=197, Invalid=1276, Unknown=9, NotChecked=0, Total=1482 [2022-01-31 01:24:19,002 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 32 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 178 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:24:19,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 276 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 110 Invalid, 0 Unknown, 178 Unchecked, 0.1s Time] [2022-01-31 01:24:19,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 01:24:19,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2022-01-31 01:24:19,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 188 states have (on average 1.1861702127659575) internal successors, (223), 192 states have internal predecessors, (223), 14 states have call successors, (14), 11 states have call predecessors, (14), 8 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 01:24:19,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 248 transitions. [2022-01-31 01:24:19,027 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 248 transitions. Word has length 48 [2022-01-31 01:24:19,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:24:19,027 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 248 transitions. [2022-01-31 01:24:19,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 31 states have internal predecessors, (70), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-31 01:24:19,027 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 248 transitions. [2022-01-31 01:24:19,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 01:24:19,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:24:19,030 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:24:19,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-31 01:24:19,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:24:19,248 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:24:19,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:24:19,248 INFO L85 PathProgramCache]: Analyzing trace with hash 280991823, now seen corresponding path program 3 times [2022-01-31 01:24:19,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:24:19,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065723639] [2022-01-31 01:24:19,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:24:19,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:24:19,274 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:24:19,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1879000574] [2022-01-31 01:24:19,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-31 01:24:19,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:24:19,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:24:19,284 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) [2022-01-31 01:24:19,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-31 01:24:19,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-31 01:24:19,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:24:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 69 conjunts are in the unsatisfiable core [2022-01-31 01:24:19,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:24:19,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 01:24:19,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 01:24:19,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:19,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-01-31 01:24:19,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2022-01-31 01:24:19,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:19,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:19,990 INFO L353 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-01-31 01:24:19,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 69 [2022-01-31 01:24:20,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 15 [2022-01-31 01:24:20,024 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:24:20,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-01-31 01:24:20,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 60 [2022-01-31 01:24:20,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,212 INFO L353 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-01-31 01:24:20,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 79 [2022-01-31 01:24:20,225 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:24:20,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 18 [2022-01-31 01:24:20,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 34 [2022-01-31 01:24:20,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 27 [2022-01-31 01:24:20,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 36 [2022-01-31 01:24:20,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 159 treesize of output 147 [2022-01-31 01:24:20,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:20,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,881 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,882 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:20,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 159 [2022-01-31 01:24:20,976 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:24:21,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 125 treesize of output 66 [2022-01-31 01:24:21,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 90 [2022-01-31 01:24:21,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 87 [2022-01-31 01:24:21,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,341 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 24 [2022-01-31 01:24:21,616 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:24:21,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 82 treesize of output 74 [2022-01-31 01:24:21,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 65 treesize of output 87 [2022-01-31 01:24:21,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:21,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 24 [2022-01-31 01:24:22,163 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:22,164 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:22,164 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:22,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:22,173 INFO L353 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-01-31 01:24:22,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 69 treesize of output 42 [2022-01-31 01:24:22,267 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:24:22,268 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:24:25,964 INFO L353 Elim1Store]: treesize reduction 22, result has 62.1 percent of original size [2022-01-31 01:24:25,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 275 treesize of output 234 [2022-01-31 01:24:25,976 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:24:25,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 230 treesize of output 226 [2022-01-31 01:24:26,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:26,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:26,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:26,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:26,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:26,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:26,256 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:24:26,256 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 62 [2022-01-31 01:24:26,391 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 01:24:26,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:24:26,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065723639] [2022-01-31 01:24:26,391 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:24:26,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879000574] [2022-01-31 01:24:26,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879000574] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:24:26,391 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:24:26,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27] total 52 [2022-01-31 01:24:26,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415494099] [2022-01-31 01:24:26,392 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:24:26,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 01:24:26,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:24:26,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 01:24:26,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=2216, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 01:24:26,393 INFO L87 Difference]: Start difference. First operand 211 states and 248 transitions. Second operand has 52 states, 50 states have (on average 1.74) internal successors, (87), 51 states have internal predecessors, (87), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 01:24:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:24:29,334 INFO L93 Difference]: Finished difference Result 282 states and 337 transitions. [2022-01-31 01:24:29,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 01:24:29,334 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 50 states have (on average 1.74) internal successors, (87), 51 states have internal predecessors, (87), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 54 [2022-01-31 01:24:29,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:24:29,337 INFO L225 Difference]: With dead ends: 282 [2022-01-31 01:24:29,337 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 01:24:29,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2192 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=820, Invalid=5032, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 01:24:29,338 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 65 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 587 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 01:24:29,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 372 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 293 Invalid, 0 Unknown, 587 Unchecked, 0.3s Time] [2022-01-31 01:24:29,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 01:24:29,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 261. [2022-01-31 01:24:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 234 states have (on average 1.205128205128205) internal successors, (282), 239 states have internal predecessors, (282), 17 states have call successors, (17), 13 states have call predecessors, (17), 9 states have return successors, (14), 8 states have call predecessors, (14), 14 states have call successors, (14) [2022-01-31 01:24:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 313 transitions. [2022-01-31 01:24:29,365 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 313 transitions. Word has length 54 [2022-01-31 01:24:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:24:29,365 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 313 transitions. [2022-01-31 01:24:29,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 50 states have (on average 1.74) internal successors, (87), 51 states have internal predecessors, (87), 6 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-31 01:24:29,366 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 313 transitions. [2022-01-31 01:24:29,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 01:24:29,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:24:29,366 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:24:29,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-01-31 01:24:29,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-31 01:24:29,569 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:24:29,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:24:29,583 INFO L85 PathProgramCache]: Analyzing trace with hash 573638769, now seen corresponding path program 4 times [2022-01-31 01:24:29,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:24:29,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891034473] [2022-01-31 01:24:29,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:24:29,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:24:29,598 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:24:29,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [632575692] [2022-01-31 01:24:29,599 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-31 01:24:29,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:24:29,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:24:29,600 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:24:29,601 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-31 01:24:29,657 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-31 01:24:29,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:24:29,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-31 01:24:29,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:24:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-31 01:24:29,770 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-31 01:24:29,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:24:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891034473] [2022-01-31 01:24:29,770 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:24:29,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632575692] [2022-01-31 01:24:29,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632575692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 01:24:29,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 01:24:29,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 01:24:29,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351477539] [2022-01-31 01:24:29,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 01:24:29,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 01:24:29,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:24:29,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 01:24:29,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-31 01:24:29,772 INFO L87 Difference]: Start difference. First operand 261 states and 313 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 01:24:29,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:24:29,905 INFO L93 Difference]: Finished difference Result 377 states and 453 transitions. [2022-01-31 01:24:29,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 01:24:29,905 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2022-01-31 01:24:29,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:24:29,906 INFO L225 Difference]: With dead ends: 377 [2022-01-31 01:24:29,906 INFO L226 Difference]: Without dead ends: 204 [2022-01-31 01:24:29,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-01-31 01:24:29,907 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 30 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:24:29,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 86 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:24:29,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-01-31 01:24:29,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 188. [2022-01-31 01:24:29,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 162 states have (on average 1.123456790123457) internal successors, (182), 166 states have internal predecessors, (182), 16 states have call successors, (16), 13 states have call predecessors, (16), 9 states have return successors, (13), 8 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 01:24:29,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 211 transitions. [2022-01-31 01:24:29,925 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 211 transitions. Word has length 54 [2022-01-31 01:24:29,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:24:29,925 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 211 transitions. [2022-01-31 01:24:29,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 7 states have internal predecessors, (41), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 01:24:29,925 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 211 transitions. [2022-01-31 01:24:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 01:24:29,926 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:24:29,926 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:24:29,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-31 01:24:30,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-01-31 01:24:30,143 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:24:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:24:30,144 INFO L85 PathProgramCache]: Analyzing trace with hash 64165679, now seen corresponding path program 5 times [2022-01-31 01:24:30,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:24:30,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577358629] [2022-01-31 01:24:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:24:30,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:24:30,161 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:24:30,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476393460] [2022-01-31 01:24:30,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-31 01:24:30,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:24:30,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:24:30,166 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:24:30,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-31 01:24:31,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-01-31 01:24:31,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:24:31,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-31 01:24:31,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:24:31,224 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-31 01:24:31,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:24:31,345 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-31 01:24:31,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:24:31,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577358629] [2022-01-31 01:24:31,346 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:24:31,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476393460] [2022-01-31 01:24:31,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476393460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-31 01:24:31,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-31 01:24:31,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-31 01:24:31,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312152588] [2022-01-31 01:24:31,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-31 01:24:31,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 01:24:31,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-31 01:24:31,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 01:24:31,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-31 01:24:31,347 INFO L87 Difference]: Start difference. First operand 188 states and 211 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 01:24:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 01:24:31,569 INFO L93 Difference]: Finished difference Result 202 states and 227 transitions. [2022-01-31 01:24:31,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 01:24:31,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2022-01-31 01:24:31,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 01:24:31,570 INFO L225 Difference]: With dead ends: 202 [2022-01-31 01:24:31,570 INFO L226 Difference]: Without dead ends: 187 [2022-01-31 01:24:31,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2022-01-31 01:24:31,571 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 96 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 01:24:31,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 90 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 01:24:31,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-01-31 01:24:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 175. [2022-01-31 01:24:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 152 states have (on average 1.125) internal successors, (171), 156 states have internal predecessors, (171), 14 states have call successors, (14), 11 states have call predecessors, (14), 8 states have return successors, (12), 7 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 01:24:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 197 transitions. [2022-01-31 01:24:31,591 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 197 transitions. Word has length 54 [2022-01-31 01:24:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 01:24:31,591 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 197 transitions. [2022-01-31 01:24:31,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 01:24:31,591 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 197 transitions. [2022-01-31 01:24:31,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 01:24:31,591 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 01:24:31,592 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 01:24:31,599 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-31 01:24:31,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-31 01:24:31,798 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 01:24:31,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 01:24:31,798 INFO L85 PathProgramCache]: Analyzing trace with hash 1905674408, now seen corresponding path program 6 times [2022-01-31 01:24:31,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-31 01:24:31,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362111111] [2022-01-31 01:24:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 01:24:31,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 01:24:31,810 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-31 01:24:31,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933237013] [2022-01-31 01:24:31,810 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-31 01:24:31,811 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-31 01:24:31,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 01:24:31,812 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-31 01:24:31,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-31 01:24:32,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-31 01:24:32,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-31 01:24:32,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 67 conjunts are in the unsatisfiable core [2022-01-31 01:24:32,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-31 01:24:32,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-01-31 01:24:32,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-31 01:24:32,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 99 [2022-01-31 01:24:32,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:32,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 98 treesize of output 133 [2022-01-31 01:24:32,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 29 [2022-01-31 01:24:32,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2022-01-31 01:24:32,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2022-01-31 01:24:32,455 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:24:32,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 155 treesize of output 141 [2022-01-31 01:24:32,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:32,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 162 [2022-01-31 01:24:32,512 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:24:32,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,537 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 128 treesize of output 78 [2022-01-31 01:24:32,700 INFO L353 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2022-01-31 01:24:32,701 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 198 treesize of output 178 [2022-01-31 01:24:32,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 3 select indices, 3 select index equivalence classes, 10 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 168 treesize of output 201 [2022-01-31 01:24:32,719 WARN L234 Elim1Store]: Array PQE input equivalent to false [2022-01-31 01:24:32,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:32,811 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 186 treesize of output 97 [2022-01-31 01:24:34,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:34,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:34,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:34,068 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-31 01:24:34,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:34,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-31 01:24:34,083 INFO L353 Elim1Store]: treesize reduction 20, result has 35.5 percent of original size [2022-01-31 01:24:34,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 123 treesize of output 69 [2022-01-31 01:24:34,194 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 01:24:34,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-31 01:24:42,942 WARN L228 SmtUtils]: Spent 8.11s on a formula simplification. DAG size of input: 48 DAG size of output: 39 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-31 01:25:53,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:25:53,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 6 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 7 new quantified variables, introduced 12 case distinctions, treesize of input 140230 treesize of output 95276 [2022-01-31 01:25:54,437 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:25:54,438 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 95276 treesize of output 95026 [2022-01-31 01:26:26,097 WARN L228 SmtUtils]: Spent 31.35s on a formula simplification. DAG size of input: 813 DAG size of output: 301 (called from [L 350] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2022-01-31 01:26:26,098 INFO L353 Elim1Store]: treesize reduction 7616, result has 13.5 percent of original size [2022-01-31 01:26:26,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 12 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 15 new quantified variables, introduced 75 case distinctions, treesize of input 100668 treesize of output 99907 [2022-01-31 01:26:26,833 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:26:26,835 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99907 treesize of output 99367 [2022-01-31 01:26:27,681 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:26:27,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99367 treesize of output 99303 [2022-01-31 01:26:28,510 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:26:28,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99303 treesize of output 99239 [2022-01-31 01:26:29,372 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:26:29,374 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 99239 treesize of output 98699 [2022-01-31 01:26:30,343 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-31 01:26:30,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98699 treesize of output 98159 [2022-01-31 01:26:32,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-31 01:26:32,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362111111] [2022-01-31 01:26:32,998 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-31 01:26:32,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933237013] [2022-01-31 01:26:32,998 WARN L320 FreeRefinementEngine]: Global settings require throwing the following exception [2022-01-31 01:26:33,004 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-31 01:26:33,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-31 01:26:33,200 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.ArithmeticException: BigInteger out of long range at java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.computeDerApplicabilityScore(QuantifierPusher.java:685) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.selectBestEliminatee(QuantifierPusher.java:668) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.doit(QuantifierPusher.java:604) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:446) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:172) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:261) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:247) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.eliminate(PartialQuantifierElimination.java:92) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:238) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:420) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeBackwardSequence(IterativePredicateTransformer.java:399) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeWeakestPreconditionSequence(IterativePredicateTransformer.java:271) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:342) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:211) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:124) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:414) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:304) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:264) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:156) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-01-31 01:26:33,202 INFO L158 Benchmark]: Toolchain (without parser) took 252510.55ms. Allocated memory was 204.5MB in the beginning and 629.1MB in the end (delta: 424.7MB). Free memory was 153.6MB in the beginning and 597.4MB in the end (delta: -443.9MB). Peak memory consumption was 296.3MB. Max. memory is 8.0GB. [2022-01-31 01:26:33,202 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 204.5MB. Free memory is still 169.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-01-31 01:26:33,202 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.62ms. Allocated memory is still 204.5MB. Free memory was 153.4MB in the beginning and 180.9MB in the end (delta: -27.4MB). Peak memory consumption was 6.8MB. Max. memory is 8.0GB. [2022-01-31 01:26:33,202 INFO L158 Benchmark]: Boogie Preprocessor took 33.50ms. Allocated memory is still 204.5MB. Free memory was 180.9MB in the beginning and 179.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-01-31 01:26:33,202 INFO L158 Benchmark]: RCFGBuilder took 262.76ms. Allocated memory is still 204.5MB. Free memory was 179.3MB in the beginning and 167.3MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-01-31 01:26:33,203 INFO L158 Benchmark]: TraceAbstraction took 251984.12ms. Allocated memory was 204.5MB in the beginning and 629.1MB in the end (delta: 424.7MB). Free memory was 167.2MB in the beginning and 597.4MB in the end (delta: -430.2MB). Peak memory consumption was 309.5MB. Max. memory is 8.0GB. [2022-01-31 01:26:33,203 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 204.5MB. Free memory is still 169.9MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 226.62ms. Allocated memory is still 204.5MB. Free memory was 153.4MB in the beginning and 180.9MB in the end (delta: -27.4MB). Peak memory consumption was 6.8MB. Max. memory is 8.0GB. * Boogie Preprocessor took 33.50ms. Allocated memory is still 204.5MB. Free memory was 180.9MB in the beginning and 179.3MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 262.76ms. Allocated memory is still 204.5MB. Free memory was 179.3MB in the beginning and 167.3MB in the end (delta: 12.0MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * TraceAbstraction took 251984.12ms. Allocated memory was 204.5MB in the beginning and 629.1MB in the end (delta: 424.7MB). Free memory was 167.2MB in the beginning and 597.4MB in the end (delta: -430.2MB). Peak memory consumption was 309.5MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: ArithmeticException: BigInteger out of long range de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: ArithmeticException: BigInteger out of long range: java.base/java.math.BigInteger.longValueExact(BigInteger.java:4765) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2022-01-31 01:26:33,423 WARN L435 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2022-01-31 01:26:33,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request...