/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-30 22:54:14,295 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-30 22:54:14,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-30 22:54:14,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-30 22:54:14,357 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-30 22:54:14,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-30 22:54:14,359 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-30 22:54:14,359 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-30 22:54:14,360 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-30 22:54:14,360 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-30 22:54:14,361 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-30 22:54:14,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-30 22:54:14,363 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-30 22:54:14,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-30 22:54:14,380 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-30 22:54:14,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-30 22:54:14,383 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-30 22:54:14,388 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-30 22:54:14,388 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-30 22:54:14,388 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-30 22:54:14,389 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2022-01-30 22:54:14,412 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-30 22:54:14,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-30 22:54:14,413 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-30 22:54:14,413 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-30 22:54:14,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-30 22:54:14,414 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-30 22:54:14,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-30 22:54:14,414 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-30 22:54:14,414 INFO L138 SettingsManager]: * Use SBE=true [2022-01-30 22:54:14,414 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-30 22:54:14,414 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-30 22:54:14,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-30 22:54:14,415 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-30 22:54:14,415 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-30 22:54:14,415 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-30 22:54:14,415 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-30 22:54:14,415 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-30 22:54:14,415 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-30 22:54:14,415 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-30 22:54:14,416 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-30 22:54:14,416 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-30 22:54:14,416 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-30 22:54:14,416 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-30 22:54:14,416 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-30 22:54:14,416 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:54:14,416 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-30 22:54:14,416 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-30 22:54:14,417 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-30 22:54:14,417 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-30 22:54:14,417 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-30 22:54:14,417 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-30 22:54:14,417 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-30 22:54:14,417 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-30 22:54:14,417 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-30 22:54:14,611 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-30 22:54:14,632 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-30 22:54:14,634 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-30 22:54:14,635 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-30 22:54:14,637 INFO L275 PluginConnector]: CDTParser initialized [2022-01-30 22:54:14,638 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-programs/partial_mod_count_limited_1.c [2022-01-30 22:54:14,694 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8625dad16/a7ff047ac757410ba399234a4eba17f7/FLAGc5740464a [2022-01-30 22:54:15,044 INFO L306 CDTParser]: Found 1 translation units. [2022-01-30 22:54:15,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_1.c [2022-01-30 22:54:15,062 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8625dad16/a7ff047ac757410ba399234a4eba17f7/FLAGc5740464a [2022-01-30 22:54:15,468 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8625dad16/a7ff047ac757410ba399234a4eba17f7 [2022-01-30 22:54:15,470 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-30 22:54:15,471 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-30 22:54:15,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-30 22:54:15,488 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-30 22:54:15,497 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-30 22:54:15,497 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:54:15" (1/1) ... [2022-01-30 22:54:15,498 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6713757f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15, skipping insertion in model container [2022-01-30 22:54:15,498 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.01 10:54:15" (1/1) ... [2022-01-30 22:54:15,504 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-30 22:54:15,516 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-30 22:54:15,651 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_1.c[331,344] [2022-01-30 22:54:15,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:54:15,688 INFO L203 MainTranslator]: Completed pre-run [2022-01-30 22:54:15,695 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-programs/partial_mod_count_limited_1.c[331,344] [2022-01-30 22:54:15,701 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-30 22:54:15,710 INFO L208 MainTranslator]: Completed translation [2022-01-30 22:54:15,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15 WrapperNode [2022-01-30 22:54:15,715 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-30 22:54:15,716 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-30 22:54:15,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-30 22:54:15,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-30 22:54:15,725 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15" (1/1) ... [2022-01-30 22:54:15,725 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15" (1/1) ... [2022-01-30 22:54:15,730 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15" (1/1) ... [2022-01-30 22:54:15,730 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15" (1/1) ... [2022-01-30 22:54:15,734 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15" (1/1) ... [2022-01-30 22:54:15,737 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15" (1/1) ... [2022-01-30 22:54:15,739 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15" (1/1) ... [2022-01-30 22:54:15,741 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-30 22:54:15,742 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-30 22:54:15,742 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-30 22:54:15,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-30 22:54:15,754 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15" (1/1) ... [2022-01-30 22:54:15,762 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-30 22:54:15,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:15,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-30 22:54:15,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-30 22:54:15,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-30 22:54:15,826 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-30 22:54:15,826 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-30 22:54:15,826 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-30 22:54:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-30 22:54:15,827 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-30 22:54:15,827 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-30 22:54:15,827 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-30 22:54:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-30 22:54:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-30 22:54:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-30 22:54:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-30 22:54:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-30 22:54:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-30 22:54:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-30 22:54:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-30 22:54:15,828 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-30 22:54:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-30 22:54:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-30 22:54:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-30 22:54:15,829 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-30 22:54:15,890 INFO L234 CfgBuilder]: Building ICFG [2022-01-30 22:54:15,892 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-30 22:54:16,019 INFO L275 CfgBuilder]: Performing block encoding [2022-01-30 22:54:16,023 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-30 22:54:16,023 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-30 22:54:16,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:54:16 BoogieIcfgContainer [2022-01-30 22:54:16,025 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-30 22:54:16,026 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-30 22:54:16,026 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-30 22:54:16,029 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-30 22:54:16,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.01 10:54:15" (1/3) ... [2022-01-30 22:54:16,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a042ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:54:16, skipping insertion in model container [2022-01-30 22:54:16,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.01 10:54:15" (2/3) ... [2022-01-30 22:54:16,030 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49a042ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.01 10:54:16, skipping insertion in model container [2022-01-30 22:54:16,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.01 10:54:16" (3/3) ... [2022-01-30 22:54:16,031 INFO L111 eAbstractionObserver]: Analyzing ICFG partial_mod_count_limited_1.c [2022-01-30 22:54:16,034 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-30 22:54:16,035 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-30 22:54:16,080 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-30 22:54:16,085 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2022-01-30 22:54:16,085 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-30 22:54:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-30 22:54:16,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 22:54:16,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:16,101 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:16,101 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:16,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:16,105 INFO L85 PathProgramCache]: Analyzing trace with hash 2033071227, now seen corresponding path program 1 times [2022-01-30 22:54:16,111 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:16,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397800572] [2022-01-30 22:54:16,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:16,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:16,235 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:16,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187986173] [2022-01-30 22:54:16,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:16,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:16,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:16,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:54:16,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-30 22:54:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:54:16,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 1 conjunts are in the unsatisfiable core [2022-01-30 22:54:16,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:54:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:54:16,398 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:54:16,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:54:16,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397800572] [2022-01-30 22:54:16,399 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:54:16,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187986173] [2022-01-30 22:54:16,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187986173] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:54:16,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:54:16,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-30 22:54:16,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523528507] [2022-01-30 22:54:16,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:54:16,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-30 22:54:16,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:54:16,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-30 22:54:16,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-30 22:54:16,434 INFO L87 Difference]: Start difference. First operand has 33 states, 23 states have (on average 1.434782608695652) internal successors, (33), 24 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:54:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:54:16,453 INFO L93 Difference]: Finished difference Result 57 states and 73 transitions. [2022-01-30 22:54:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-30 22:54:16,455 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-01-30 22:54:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:54:16,460 INFO L225 Difference]: With dead ends: 57 [2022-01-30 22:54:16,460 INFO L226 Difference]: Without dead ends: 28 [2022-01-30 22:54:16,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-30 22:54:16,465 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:54:16,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:54:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-30 22:54:16,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-30 22:54:16,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:54:16,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-01-30 22:54:16,497 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2022-01-30 22:54:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:54:16,497 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-01-30 22:54:16,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-30 22:54:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-01-30 22:54:16,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-30 22:54:16,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:16,499 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:16,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-30 22:54:16,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-01-30 22:54:16,718 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:16,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:16,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2003730631, now seen corresponding path program 1 times [2022-01-30 22:54:16,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:16,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164841916] [2022-01-30 22:54:16,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:16,720 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:16,733 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:16,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489351937] [2022-01-30 22:54:16,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:16,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:16,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:16,764 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:54:16,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-30 22:54:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:54:16,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-30 22:54:16,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:54:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:54:16,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:54:16,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:54:16,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164841916] [2022-01-30 22:54:16,921 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:54:16,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489351937] [2022-01-30 22:54:16,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489351937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:54:16,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:54:16,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-30 22:54:16,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699743665] [2022-01-30 22:54:16,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:54:16,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-30 22:54:16,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:54:16,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-30 22:54:16,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:54:16,934 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:54:16,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:54:16,998 INFO L93 Difference]: Finished difference Result 48 states and 58 transitions. [2022-01-30 22:54:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-30 22:54:16,999 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-01-30 22:54:16,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:54:17,004 INFO L225 Difference]: With dead ends: 48 [2022-01-30 22:54:17,005 INFO L226 Difference]: Without dead ends: 37 [2022-01-30 22:54:17,005 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-30 22:54:17,007 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 29 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:54:17,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:54:17,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-30 22:54:17,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-01-30 22:54:17,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:54:17,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2022-01-30 22:54:17,025 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2022-01-30 22:54:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:54:17,025 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2022-01-30 22:54:17,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:54:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2022-01-30 22:54:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-01-30 22:54:17,027 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:17,027 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:17,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-01-30 22:54:17,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-01-30 22:54:17,244 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:17,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:17,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1285216633, now seen corresponding path program 1 times [2022-01-30 22:54:17,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:17,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549031042] [2022-01-30 22:54:17,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:17,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:17,257 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:17,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [307083624] [2022-01-30 22:54:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:17,258 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:17,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:17,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:54:17,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-30 22:54:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:54:17,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-30 22:54:17,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:54:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:54:17,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:54:17,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-30 22:54:17,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:54:17,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549031042] [2022-01-30 22:54:17,441 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:54:17,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307083624] [2022-01-30 22:54:17,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307083624] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:54:17,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:54:17,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-01-30 22:54:17,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837259641] [2022-01-30 22:54:17,442 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:54:17,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-30 22:54:17,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:54:17,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-30 22:54:17,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:54:17,443 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:54:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:54:17,531 INFO L93 Difference]: Finished difference Result 68 states and 88 transitions. [2022-01-30 22:54:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-30 22:54:17,531 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2022-01-30 22:54:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:54:17,532 INFO L225 Difference]: With dead ends: 68 [2022-01-30 22:54:17,532 INFO L226 Difference]: Without dead ends: 57 [2022-01-30 22:54:17,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=50, Unknown=0, NotChecked=0, Total=90 [2022-01-30 22:54:17,533 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 93 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:54:17,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 79 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:54:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-30 22:54:17,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 44. [2022-01-30 22:54:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:54:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-01-30 22:54:17,539 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2022-01-30 22:54:17,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:54:17,539 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-01-30 22:54:17,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 4 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2022-01-30 22:54:17,539 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-01-30 22:54:17,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-01-30 22:54:17,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:17,540 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:17,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-30 22:54:17,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:17,767 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:17,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1985196231, now seen corresponding path program 2 times [2022-01-30 22:54:17,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:17,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466131697] [2022-01-30 22:54:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:17,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:17,799 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:17,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1014624039] [2022-01-30 22:54:17,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:54:17,800 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:17,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:17,810 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:54:17,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-30 22:54:17,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-01-30 22:54:17,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:54:17,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-30 22:54:17,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:54:18,342 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2022-01-30 22:54:18,342 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-30 22:54:18,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:54:18,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466131697] [2022-01-30 22:54:18,342 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:54:18,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014624039] [2022-01-30 22:54:18,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014624039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-30 22:54:18,343 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-30 22:54:18,343 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-30 22:54:18,343 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632724007] [2022-01-30 22:54:18,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-30 22:54:18,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-30 22:54:18,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:54:18,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-30 22:54:18,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-01-30 22:54:18,344 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:54:18,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:54:18,446 INFO L93 Difference]: Finished difference Result 58 states and 71 transitions. [2022-01-30 22:54:18,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-30 22:54:18,446 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 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 40 [2022-01-30 22:54:18,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:54:18,447 INFO L225 Difference]: With dead ends: 58 [2022-01-30 22:54:18,447 INFO L226 Difference]: Without dead ends: 56 [2022-01-30 22:54:18,447 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:54:18,448 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:54:18,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 165 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:54:18,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-30 22:54:18,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-30 22:54:18,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 45 states have (on average 1.288888888888889) internal successors, (58), 45 states have internal predecessors, (58), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:54:18,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2022-01-30 22:54:18,455 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 40 [2022-01-30 22:54:18,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:54:18,455 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2022-01-30 22:54:18,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-30 22:54:18,455 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2022-01-30 22:54:18,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-30 22:54:18,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:18,457 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:18,474 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-30 22:54:18,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:18,674 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:18,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:18,675 INFO L85 PathProgramCache]: Analyzing trace with hash 253394296, now seen corresponding path program 1 times [2022-01-30 22:54:18,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:18,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528763229] [2022-01-30 22:54:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:18,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:18,690 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:18,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1951150447] [2022-01-30 22:54:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:18,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:18,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:18,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:54:18,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-30 22:54:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:54:18,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-30 22:54:18,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:54:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:54:18,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:54:18,959 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:54:18,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:54:18,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528763229] [2022-01-30 22:54:18,960 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:54:18,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951150447] [2022-01-30 22:54:18,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951150447] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:54:18,960 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:54:18,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2022-01-30 22:54:18,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014605009] [2022-01-30 22:54:18,960 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:54:18,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-30 22:54:18,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:54:18,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-30 22:54:18,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-30 22:54:18,962 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:54:19,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:54:19,171 INFO L93 Difference]: Finished difference Result 212 states and 297 transitions. [2022-01-30 22:54:19,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-30 22:54:19,171 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 48 [2022-01-30 22:54:19,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:54:19,173 INFO L225 Difference]: With dead ends: 212 [2022-01-30 22:54:19,173 INFO L226 Difference]: Without dead ends: 189 [2022-01-30 22:54:19,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=191, Unknown=0, NotChecked=0, Total=342 [2022-01-30 22:54:19,174 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 336 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-30 22:54:19,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 99 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-30 22:54:19,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-30 22:54:19,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 86. [2022-01-30 22:54:19,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 75 states have (on average 1.3333333333333333) internal successors, (100), 75 states have internal predecessors, (100), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:54:19,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 111 transitions. [2022-01-30 22:54:19,187 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 111 transitions. Word has length 48 [2022-01-30 22:54:19,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:54:19,187 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 111 transitions. [2022-01-30 22:54:19,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 14 states have internal predecessors, (68), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:54:19,188 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 111 transitions. [2022-01-30 22:54:19,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-30 22:54:19,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:19,189 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:19,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-01-30 22:54:19,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:19,403 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:19,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:19,404 INFO L85 PathProgramCache]: Analyzing trace with hash -2140424840, now seen corresponding path program 2 times [2022-01-30 22:54:19,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:19,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664592795] [2022-01-30 22:54:19,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:19,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:19,425 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:19,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203854271] [2022-01-30 22:54:19,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:54:19,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:19,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:19,438 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:54:19,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-30 22:54:19,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:54:19,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:54:19,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 22:54:19,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:54:19,828 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:54:19,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:54:20,063 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 2 proven. 235 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:54:20,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:54:20,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664592795] [2022-01-30 22:54:20,064 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:54:20,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203854271] [2022-01-30 22:54:20,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203854271] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:54:20,064 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:54:20,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-01-30 22:54:20,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013273136] [2022-01-30 22:54:20,064 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:54:20,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-30 22:54:20,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:54:20,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-30 22:54:20,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-30 22:54:20,067 INFO L87 Difference]: Start difference. First operand 86 states and 111 transitions. Second operand has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:54:20,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:54:20,626 INFO L93 Difference]: Finished difference Result 416 states and 603 transitions. [2022-01-30 22:54:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-30 22:54:20,627 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 78 [2022-01-30 22:54:20,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:54:20,629 INFO L225 Difference]: With dead ends: 416 [2022-01-30 22:54:20,630 INFO L226 Difference]: Without dead ends: 393 [2022-01-30 22:54:20,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=589, Invalid=743, Unknown=0, NotChecked=0, Total=1332 [2022-01-30 22:54:20,631 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 675 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-30 22:54:20,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 140 Invalid, 439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-30 22:54:20,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-30 22:54:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 146. [2022-01-30 22:54:20,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 135 states have (on average 1.362962962962963) internal successors, (184), 135 states have internal predecessors, (184), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:54:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 195 transitions. [2022-01-30 22:54:20,652 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 195 transitions. Word has length 78 [2022-01-30 22:54:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:54:20,652 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 195 transitions. [2022-01-30 22:54:20,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.923076923076923) internal successors, (128), 26 states have internal predecessors, (128), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:54:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 195 transitions. [2022-01-30 22:54:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-30 22:54:20,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:20,653 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:20,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-30 22:54:20,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:20,872 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:20,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:20,872 INFO L85 PathProgramCache]: Analyzing trace with hash -289921672, now seen corresponding path program 3 times [2022-01-30 22:54:20,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:20,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314582802] [2022-01-30 22:54:20,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:20,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:20,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:20,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108221999] [2022-01-30 22:54:20,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:54:20,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:20,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:20,910 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:54:20,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-30 22:54:21,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 22:54:21,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:54:21,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-30 22:54:21,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:54:21,267 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 15 treesize of output 11 [2022-01-30 22:54:21,276 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 23 treesize of output 7 [2022-01-30 22:54:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 1097 trivial. 0 not checked. [2022-01-30 22:54:21,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:54:29,549 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:54:29,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314582802] [2022-01-30 22:54:29,550 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:54:29,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108221999] [2022-01-30 22:54:29,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108221999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-30 22:54:29,550 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-30 22:54:29,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2022-01-30 22:54:29,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300904305] [2022-01-30 22:54:29,550 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-30 22:54:29,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-30 22:54:29,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:54:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-30 22:54:29,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-30 22:54:29,552 INFO L87 Difference]: Start difference. First operand 146 states and 195 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:54:29,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:54:29,614 INFO L93 Difference]: Finished difference Result 342 states and 460 transitions. [2022-01-30 22:54:29,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-30 22:54:29,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 138 [2022-01-30 22:54:29,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:54:29,616 INFO L225 Difference]: With dead ends: 342 [2022-01-30 22:54:29,616 INFO L226 Difference]: Without dead ends: 212 [2022-01-30 22:54:29,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-30 22:54:29,617 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-30 22:54:29,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 91 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-30 22:54:29,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-01-30 22:54:29,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 190. [2022-01-30 22:54:29,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 179 states have (on average 1.2737430167597765) internal successors, (228), 179 states have internal predecessors, (228), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:54:29,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 239 transitions. [2022-01-30 22:54:29,642 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 239 transitions. Word has length 138 [2022-01-30 22:54:29,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:54:29,643 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 239 transitions. [2022-01-30 22:54:29,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-30 22:54:29,644 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 239 transitions. [2022-01-30 22:54:29,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-30 22:54:29,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:29,651 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:29,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-30 22:54:29,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:29,869 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:29,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash 866818872, now seen corresponding path program 1 times [2022-01-30 22:54:29,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:29,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551304986] [2022-01-30 22:54:29,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:29,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:29,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:29,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1878836578] [2022-01-30 22:54:29,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:29,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:29,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:29,916 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:54:29,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-30 22:54:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-30 22:54:30,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 25 conjunts are in the unsatisfiable core [2022-01-30 22:54:30,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:54:30,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 0 proven. 1177 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:54:30,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:54:31,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1182 backedges. 2 proven. 1177 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:54:31,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:54:31,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551304986] [2022-01-30 22:54:31,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:54:31,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878836578] [2022-01-30 22:54:31,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878836578] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:54:31,386 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:54:31,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2022-01-30 22:54:31,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017433092] [2022-01-30 22:54:31,387 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:54:31,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-30 22:54:31,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:54:31,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-30 22:54:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-30 22:54:31,389 INFO L87 Difference]: Start difference. First operand 190 states and 239 transitions. Second operand has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:54:33,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:54:33,055 INFO L93 Difference]: Finished difference Result 916 states and 1307 transitions. [2022-01-30 22:54:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-30 22:54:33,056 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 138 [2022-01-30 22:54:33,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:54:33,059 INFO L225 Difference]: With dead ends: 916 [2022-01-30 22:54:33,059 INFO L226 Difference]: Without dead ends: 893 [2022-01-30 22:54:33,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2329, Invalid=2927, Unknown=0, NotChecked=0, Total=5256 [2022-01-30 22:54:33,061 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 1465 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1488 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-30 22:54:33,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1488 Valid, 290 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-30 22:54:33,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-30 22:54:33,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 358. [2022-01-30 22:54:33,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 347 states have (on average 1.2795389048991355) internal successors, (444), 347 states have internal predecessors, (444), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:54:33,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 455 transitions. [2022-01-30 22:54:33,089 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 455 transitions. Word has length 138 [2022-01-30 22:54:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:54:33,089 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 455 transitions. [2022-01-30 22:54:33,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 4.96) internal successors, (248), 50 states have internal predecessors, (248), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:54:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 455 transitions. [2022-01-30 22:54:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2022-01-30 22:54:33,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:33,092 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:33,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-30 22:54:33,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-01-30 22:54:33,310 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:33,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1873054264, now seen corresponding path program 2 times [2022-01-30 22:54:33,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:33,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90186565] [2022-01-30 22:54:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:33,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:33,335 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:33,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [716034351] [2022-01-30 22:54:33,336 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-30 22:54:33,336 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:33,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:33,337 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:54:33,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-30 22:54:33,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-30 22:54:33,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:54:33,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 947 conjuncts, 49 conjunts are in the unsatisfiable core [2022-01-30 22:54:33,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:54:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 0 proven. 5221 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-30 22:54:35,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:54:38,159 INFO L134 CoverageAnalysis]: Checked inductivity of 5226 backedges. 2 proven. 5221 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-30 22:54:38,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:54:38,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90186565] [2022-01-30 22:54:38,160 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:54:38,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716034351] [2022-01-30 22:54:38,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716034351] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:54:38,160 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:54:38,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 98 [2022-01-30 22:54:38,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701407462] [2022-01-30 22:54:38,161 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:54:38,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-30 22:54:38,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:54:38,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-30 22:54:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4659, Invalid=4847, Unknown=0, NotChecked=0, Total=9506 [2022-01-30 22:54:38,165 INFO L87 Difference]: Start difference. First operand 358 states and 455 transitions. Second operand has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:54:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:54:46,998 INFO L93 Difference]: Finished difference Result 1828 states and 2627 transitions. [2022-01-30 22:54:47,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-30 22:54:47,000 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 258 [2022-01-30 22:54:47,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:54:47,009 INFO L225 Difference]: With dead ends: 1828 [2022-01-30 22:54:47,010 INFO L226 Difference]: Without dead ends: 1805 [2022-01-30 22:54:47,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 419 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=9265, Invalid=11615, Unknown=0, NotChecked=0, Total=20880 [2022-01-30 22:54:47,017 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 3641 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 1391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3688 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 2529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1391 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-30 22:54:47,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3688 Valid, 539 Invalid, 2529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1391 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-30 22:54:47,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1805 states. [2022-01-30 22:54:47,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1805 to 694. [2022-01-30 22:54:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 694 states, 683 states have (on average 1.2825768667642752) internal successors, (876), 683 states have internal predecessors, (876), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-30 22:54:47,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 887 transitions. [2022-01-30 22:54:47,095 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 887 transitions. Word has length 258 [2022-01-30 22:54:47,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:54:47,096 INFO L470 AbstractCegarLoop]: Abstraction has 694 states and 887 transitions. [2022-01-30 22:54:47,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 4.979591836734694) internal successors, (488), 98 states have internal predecessors, (488), 4 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-30 22:54:47,097 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 887 transitions. [2022-01-30 22:54:47,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2022-01-30 22:54:47,101 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:47,102 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:47,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-30 22:54:47,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:47,321 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:47,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:47,322 INFO L85 PathProgramCache]: Analyzing trace with hash -102406088, now seen corresponding path program 3 times [2022-01-30 22:54:47,322 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:47,322 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932293451] [2022-01-30 22:54:47,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:47,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:47,380 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:47,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645041909] [2022-01-30 22:54:47,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-30 22:54:47,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:47,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:47,383 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-30 22:54:47,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-30 22:54:47,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-30 22:54:47,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-30 22:54:47,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-30 22:54:47,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-30 22:54:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 21954 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2022-01-30 22:54:49,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-30 22:54:51,728 INFO L134 CoverageAnalysis]: Checked inductivity of 21954 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 21949 trivial. 0 not checked. [2022-01-30 22:54:51,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-30 22:54:51,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932293451] [2022-01-30 22:54:51,728 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-30 22:54:51,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645041909] [2022-01-30 22:54:51,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645041909] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-30 22:54:51,728 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-30 22:54:51,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-01-30 22:54:51,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699516063] [2022-01-30 22:54:51,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-30 22:54:51,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-30 22:54:51,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-30 22:54:51,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-30 22:54:51,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2022-01-30 22:54:51,731 INFO L87 Difference]: Start difference. First operand 694 states and 887 transitions. Second operand has 12 states, 10 states have (on average 4.7) internal successors, (47), 11 states have internal predecessors, (47), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-30 22:54:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-30 22:54:52,025 INFO L93 Difference]: Finished difference Result 716 states and 916 transitions. [2022-01-30 22:54:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-30 22:54:52,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 4.7) internal successors, (47), 11 states have internal predecessors, (47), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 498 [2022-01-30 22:54:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-30 22:54:52,048 INFO L225 Difference]: With dead ends: 716 [2022-01-30 22:54:52,048 INFO L226 Difference]: Without dead ends: 714 [2022-01-30 22:54:52,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 985 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2022-01-30 22:54:52,049 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 107 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-30 22:54:52,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 149 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 141 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-30 22:54:52,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2022-01-30 22:54:52,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 714. [2022-01-30 22:54:52,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 698 states have (on average 1.2822349570200573) internal successors, (895), 698 states have internal predecessors, (895), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-30 22:54:52,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 914 transitions. [2022-01-30 22:54:52,119 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 914 transitions. Word has length 498 [2022-01-30 22:54:52,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-30 22:54:52,121 INFO L470 AbstractCegarLoop]: Abstraction has 714 states and 914 transitions. [2022-01-30 22:54:52,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 4.7) internal successors, (47), 11 states have internal predecessors, (47), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2022-01-30 22:54:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 914 transitions. [2022-01-30 22:54:52,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2022-01-30 22:54:52,128 INFO L506 BasicCegarLoop]: Found error trace [2022-01-30 22:54:52,128 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-30 22:54:52,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-30 22:54:52,343 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,SelfDestructingSolverStorable9 [2022-01-30 22:54:52,344 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-30 22:54:52,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-30 22:54:52,344 INFO L85 PathProgramCache]: Analyzing trace with hash 156650292, now seen corresponding path program 4 times [2022-01-30 22:54:52,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-30 22:54:52,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317814682] [2022-01-30 22:54:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-30 22:54:52,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-30 22:54:52,405 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-30 22:54:52,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2019221787] [2022-01-30 22:54:52,405 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-30 22:54:52,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-30 22:54:52,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-30 22:54:52,406 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) [2022-01-30 22:54:52,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process