/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/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 22:33:15,032 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 22:33:15,034 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 22:33:15,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 22:33:15,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 22:33:15,118 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 22:33:15,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 22:33:15,119 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/BvToInt/svcomp-Reach-64bit-Automizer_Default.epf [2022-01-09 22:33:15,142 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 22:33:15,142 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 22:33:15,143 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 22:33:15,143 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 22:33:15,143 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 22:33:15,143 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 22:33:15,144 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 22:33:15,144 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 22:33:15,144 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 22:33:15,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 22:33:15,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 22:33:15,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 22:33:15,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 22:33:15,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 22:33:15,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 22:33:15,145 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 22:33:15,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 22:33:15,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 22:33:15,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 22:33:15,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 22:33:15,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 22:33:15,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:33:15,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 22:33:15,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 22:33:15,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 22:33:15,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 22:33:15,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 22:33:15,146 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 22:33:15,147 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 22:33:15,147 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 22:33:15,147 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 22:33:15,316 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 22:33:15,331 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 22:33:15,332 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 22:33:15,333 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 22:33:15,334 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 22:33:15,335 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2022-01-09 22:33:15,374 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bbba93cd/8c3e6c7dbb7b4ce7bbccc07394d7db9d/FLAG3ed22e007 [2022-01-09 22:33:15,694 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 22:33:15,695 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound10.c [2022-01-09 22:33:15,702 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bbba93cd/8c3e6c7dbb7b4ce7bbccc07394d7db9d/FLAG3ed22e007 [2022-01-09 22:33:15,715 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8bbba93cd/8c3e6c7dbb7b4ce7bbccc07394d7db9d [2022-01-09 22:33:15,717 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 22:33:15,719 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 22:33:15,721 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 22:33:15,721 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 22:33:15,723 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 22:33:15,724 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:15,725 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5adbe612 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15, skipping insertion in model container [2022-01-09 22:33:15,725 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:15,729 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 22:33:15,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 22:33:15,880 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound10.c[588,601] [2022-01-09 22:33:15,920 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:33:15,925 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 22:33:15,935 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_unwindbound10.c[588,601] [2022-01-09 22:33:15,952 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 22:33:15,960 INFO L208 MainTranslator]: Completed translation [2022-01-09 22:33:15,960 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15 WrapperNode [2022-01-09 22:33:15,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 22:33:15,961 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 22:33:15,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 22:33:15,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 22:33:15,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:15,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:15,996 INFO L137 Inliner]: procedures = 14, calls = 18, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 49 [2022-01-09 22:33:15,996 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 22:33:15,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 22:33:15,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 22:33:15,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 22:33:16,002 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:16,002 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:16,005 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:16,005 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:16,013 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:16,016 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:16,021 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:16,023 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 22:33:16,024 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 22:33:16,024 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 22:33:16,024 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 22:33:16,025 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (1/1) ... [2022-01-09 22:33:16,029 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 22:33:16,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:16,043 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) [2022-01-09 22:33:16,058 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 [2022-01-09 22:33:16,065 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 22:33:16,066 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 22:33:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 22:33:16,067 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 22:33:16,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-09 22:33:16,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-09 22:33:16,099 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 22:33:16,100 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 22:33:16,226 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 22:33:16,229 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 22:33:16,229 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-01-09 22:33:16,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:33:16 BoogieIcfgContainer [2022-01-09 22:33:16,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 22:33:16,231 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 22:33:16,231 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 22:33:16,239 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 22:33:16,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 10:33:15" (1/3) ... [2022-01-09 22:33:16,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@809f9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:33:16, skipping insertion in model container [2022-01-09 22:33:16,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 10:33:15" (2/3) ... [2022-01-09 22:33:16,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@809f9ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 10:33:16, skipping insertion in model container [2022-01-09 22:33:16,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 10:33:16" (3/3) ... [2022-01-09 22:33:16,241 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_unwindbound10.c [2022-01-09 22:33:16,246 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 22:33:16,246 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 22:33:16,281 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 22:33:16,287 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 [2022-01-09 22:33:16,287 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 22:33:16,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-09 22:33:16,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-01-09 22:33:16,301 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:16,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:16,302 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:16,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:16,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1823967074, now seen corresponding path program 1 times [2022-01-09 22:33:16,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:16,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893647400] [2022-01-09 22:33:16,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:16,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:16,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:33:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:33:16,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:16,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893647400] [2022-01-09 22:33:16,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893647400] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:33:16,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:33:16,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 22:33:16,419 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525096608] [2022-01-09 22:33:16,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:33:16,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 22:33:16,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:16,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 22:33:16,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:33:16,441 INFO L87 Difference]: Start difference. First operand has 26 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:33:16,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:16,453 INFO L93 Difference]: Finished difference Result 50 states and 87 transitions. [2022-01-09 22:33:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 22:33:16,455 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2022-01-09 22:33:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:16,458 INFO L225 Difference]: With dead ends: 50 [2022-01-09 22:33:16,459 INFO L226 Difference]: Without dead ends: 22 [2022-01-09 22:33:16,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 22:33:16,463 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 [2022-01-09 22:33:16,463 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] [2022-01-09 22:33:16,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-01-09 22:33:16,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-01-09 22:33:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-09 22:33:16,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 33 transitions. [2022-01-09 22:33:16,484 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 33 transitions. Word has length 7 [2022-01-09 22:33:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:16,484 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 33 transitions. [2022-01-09 22:33:16,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:33:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 33 transitions. [2022-01-09 22:33:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 22:33:16,485 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:16,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:16,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 22:33:16,485 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:16,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:16,486 INFO L85 PathProgramCache]: Analyzing trace with hash 178926099, now seen corresponding path program 1 times [2022-01-09 22:33:16,486 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:16,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918821489] [2022-01-09 22:33:16,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:16,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:33:16,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:33:16,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:16,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918821489] [2022-01-09 22:33:16,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918821489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:33:16,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:33:16,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-09 22:33:16,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736196222] [2022-01-09 22:33:16,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:33:16,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 22:33:16,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:16,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 22:33:16,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:33:16,523 INFO L87 Difference]: Start difference. First operand 22 states and 33 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:33:16,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:16,537 INFO L93 Difference]: Finished difference Result 36 states and 52 transitions. [2022-01-09 22:33:16,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 22:33:16,537 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-09 22:33:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:16,538 INFO L225 Difference]: With dead ends: 36 [2022-01-09 22:33:16,538 INFO L226 Difference]: Without dead ends: 24 [2022-01-09 22:33:16,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 22:33:16,539 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:16,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:33:16,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-01-09 22:33:16,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-01-09 22:33:16,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 11 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-09 22:33:16,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 35 transitions. [2022-01-09 22:33:16,544 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 35 transitions. Word has length 8 [2022-01-09 22:33:16,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:16,544 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 35 transitions. [2022-01-09 22:33:16,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:33:16,544 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 35 transitions. [2022-01-09 22:33:16,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-01-09 22:33:16,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:16,545 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:16,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-09 22:33:16,545 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:16,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:16,546 INFO L85 PathProgramCache]: Analyzing trace with hash 180475231, now seen corresponding path program 1 times [2022-01-09 22:33:16,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:16,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860371827] [2022-01-09 22:33:16,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:16,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:33:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:33:16,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:16,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860371827] [2022-01-09 22:33:16,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860371827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:33:16,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:33:16,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:33:16,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424265737] [2022-01-09 22:33:16,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:33:16,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:33:16,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:16,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:33:16,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:33:16,631 INFO L87 Difference]: Start difference. First operand 24 states and 35 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:33:16,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:16,726 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2022-01-09 22:33:16,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:33:16,726 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-01-09 22:33:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:16,727 INFO L225 Difference]: With dead ends: 30 [2022-01-09 22:33:16,727 INFO L226 Difference]: Without dead ends: 28 [2022-01-09 22:33:16,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:33:16,728 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 8 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:16,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 84 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:33:16,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-09 22:33:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-09 22:33:16,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-09 22:33:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 38 transitions. [2022-01-09 22:33:16,735 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 38 transitions. Word has length 8 [2022-01-09 22:33:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:16,736 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 38 transitions. [2022-01-09 22:33:16,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-09 22:33:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 38 transitions. [2022-01-09 22:33:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-01-09 22:33:16,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:16,736 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:16,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-09 22:33:16,737 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1275442234, now seen corresponding path program 1 times [2022-01-09 22:33:16,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:16,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742602902] [2022-01-09 22:33:16,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:16,738 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:16,751 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:16,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099051513] [2022-01-09 22:33:16,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:16,752 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:16,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:16,760 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) [2022-01-09 22:33:16,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-09 22:33:16,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:33:16,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 22:33:16,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:16,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-09 22:33:16,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:33:16,865 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:16,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742602902] [2022-01-09 22:33:16,865 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:16,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099051513] [2022-01-09 22:33:16,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099051513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:33:16,865 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:33:16,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:33:16,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034346135] [2022-01-09 22:33:16,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:33:16,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:33:16,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:16,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:33:16,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:33:16,867 INFO L87 Difference]: Start difference. First operand 28 states and 38 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-09 22:33:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:16,901 INFO L93 Difference]: Finished difference Result 46 states and 66 transitions. [2022-01-09 22:33:16,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:33:16,901 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-01-09 22:33:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:16,902 INFO L225 Difference]: With dead ends: 46 [2022-01-09 22:33:16,902 INFO L226 Difference]: Without dead ends: 44 [2022-01-09 22:33:16,902 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:33:16,903 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:16,904 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 143 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:33:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-01-09 22:33:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-01-09 22:33:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-09 22:33:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2022-01-09 22:33:16,911 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 13 [2022-01-09 22:33:16,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:16,911 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2022-01-09 22:33:16,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-09 22:33:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2022-01-09 22:33:16,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-09 22:33:16,912 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:16,912 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:16,928 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-01-09 22:33:17,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:17,128 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:17,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:17,129 INFO L85 PathProgramCache]: Analyzing trace with hash 427545983, now seen corresponding path program 1 times [2022-01-09 22:33:17,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:17,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345484905] [2022-01-09 22:33:17,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:17,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:17,144 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:17,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [965213958] [2022-01-09 22:33:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:17,145 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:17,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:17,146 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) [2022-01-09 22:33:17,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-09 22:33:17,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:33:17,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 22:33:17,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 22:33:17,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:33:17,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:17,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345484905] [2022-01-09 22:33:17,236 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:17,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965213958] [2022-01-09 22:33:17,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965213958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:33:17,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:33:17,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:33:17,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001205056] [2022-01-09 22:33:17,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:33:17,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:33:17,237 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:17,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:33:17,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:33:17,238 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-09 22:33:17,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:17,290 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-01-09 22:33:17,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:33:17,293 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2022-01-09 22:33:17,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:17,296 INFO L225 Difference]: With dead ends: 50 [2022-01-09 22:33:17,297 INFO L226 Difference]: Without dead ends: 48 [2022-01-09 22:33:17,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:33:17,298 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:17,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 143 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:33:17,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-09 22:33:17,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-01-09 22:33:17,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 23 states have internal predecessors, (25), 18 states have call successors, (18), 4 states have call predecessors, (18), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-09 22:33:17,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 60 transitions. [2022-01-09 22:33:17,306 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 60 transitions. Word has length 18 [2022-01-09 22:33:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:17,306 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 60 transitions. [2022-01-09 22:33:17,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-01-09 22:33:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 60 transitions. [2022-01-09 22:33:17,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-09 22:33:17,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:17,307 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:17,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:17,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:17,520 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:17,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:17,520 INFO L85 PathProgramCache]: Analyzing trace with hash 5607206, now seen corresponding path program 1 times [2022-01-09 22:33:17,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:17,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519248643] [2022-01-09 22:33:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:17,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:17,528 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:17,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855483808] [2022-01-09 22:33:17,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:17,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:17,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:17,529 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) [2022-01-09 22:33:17,530 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-09 22:33:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:33:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2022-01-09 22:33:17,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:17,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 22:33:17,651 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 22:33:17,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:17,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519248643] [2022-01-09 22:33:17,652 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:17,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855483808] [2022-01-09 22:33:17,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855483808] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 22:33:17,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 22:33:17,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-09 22:33:17,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379554321] [2022-01-09 22:33:17,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 22:33:17,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-09 22:33:17,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:17,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-09 22:33:17,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-01-09 22:33:17,655 INFO L87 Difference]: Start difference. First operand 44 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 22:33:17,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:17,716 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2022-01-09 22:33:17,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-09 22:33:17,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-01-09 22:33:17,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:17,719 INFO L225 Difference]: With dead ends: 58 [2022-01-09 22:33:17,719 INFO L226 Difference]: Without dead ends: 46 [2022-01-09 22:33:17,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-09 22:33:17,722 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:17,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 141 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 22:33:17,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-09 22:33:17,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-01-09 22:33:17,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-09 22:33:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2022-01-09 22:33:17,736 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 23 [2022-01-09 22:33:17,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:17,736 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2022-01-09 22:33:17,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 22:33:17,736 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2022-01-09 22:33:17,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-09 22:33:17,737 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:17,737 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:17,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:17,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:17,943 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:17,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:17,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1172224904, now seen corresponding path program 1 times [2022-01-09 22:33:17,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:17,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771173372] [2022-01-09 22:33:17,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:17,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:17,954 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:17,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035309115] [2022-01-09 22:33:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:17,954 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:17,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:17,956 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) [2022-01-09 22:33:17,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-09 22:33:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:33:18,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-09 22:33:18,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 30 proven. 2 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-01-09 22:33:18,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-09 22:33:18,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:18,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771173372] [2022-01-09 22:33:18,176 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:18,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035309115] [2022-01-09 22:33:18,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035309115] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:33:18,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:33:18,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-01-09 22:33:18,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127413053] [2022-01-09 22:33:18,176 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:18,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:33:18,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:18,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:33:18,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:33:18,177 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-09 22:33:18,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:18,290 INFO L93 Difference]: Finished difference Result 116 states and 151 transitions. [2022-01-09 22:33:18,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-09 22:33:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 41 [2022-01-09 22:33:18,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:18,295 INFO L225 Difference]: With dead ends: 116 [2022-01-09 22:33:18,295 INFO L226 Difference]: Without dead ends: 100 [2022-01-09 22:33:18,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-01-09 22:33:18,298 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 65 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:18,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 225 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:33:18,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-01-09 22:33:18,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2022-01-09 22:33:18,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 47 states have (on average 1.148936170212766) internal successors, (54), 50 states have internal predecessors, (54), 38 states have call successors, (38), 10 states have call predecessors, (38), 10 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-09 22:33:18,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2022-01-09 22:33:18,320 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 41 [2022-01-09 22:33:18,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:18,320 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2022-01-09 22:33:18,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-01-09 22:33:18,321 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2022-01-09 22:33:18,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-09 22:33:18,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:18,321 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:18,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:18,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:18,540 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:18,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:18,544 INFO L85 PathProgramCache]: Analyzing trace with hash -680109588, now seen corresponding path program 1 times [2022-01-09 22:33:18,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:18,544 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17580741] [2022-01-09 22:33:18,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:18,544 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:18,551 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:18,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1105134290] [2022-01-09 22:33:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:18,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:18,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:18,553 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) [2022-01-09 22:33:18,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-09 22:33:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:33:18,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 22:33:18,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:18,694 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-09 22:33:18,694 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:18,774 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-01-09 22:33:18,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:18,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17580741] [2022-01-09 22:33:18,774 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:18,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105134290] [2022-01-09 22:33:18,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105134290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:33:18,774 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:33:18,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-09 22:33:18,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736535460] [2022-01-09 22:33:18,775 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:18,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:33:18,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:18,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:33:18,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:33:18,776 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-09 22:33:18,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:18,960 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-01-09 22:33:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-09 22:33:18,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 41 [2022-01-09 22:33:18,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:18,962 INFO L225 Difference]: With dead ends: 114 [2022-01-09 22:33:18,962 INFO L226 Difference]: Without dead ends: 112 [2022-01-09 22:33:18,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2022-01-09 22:33:18,962 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 12 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:18,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 144 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:33:18,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-09 22:33:18,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-01-09 22:33:18,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 59 states have (on average 1.11864406779661) internal successors, (66), 62 states have internal predecessors, (66), 38 states have call successors, (38), 14 states have call predecessors, (38), 14 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-09 22:33:18,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 139 transitions. [2022-01-09 22:33:18,978 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 139 transitions. Word has length 41 [2022-01-09 22:33:18,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:18,978 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 139 transitions. [2022-01-09 22:33:18,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-01-09 22:33:18,978 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 139 transitions. [2022-01-09 22:33:18,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-09 22:33:18,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:18,981 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:18,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:19,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:19,197 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:19,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:19,197 INFO L85 PathProgramCache]: Analyzing trace with hash -399462631, now seen corresponding path program 2 times [2022-01-09 22:33:19,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:19,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282676320] [2022-01-09 22:33:19,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:19,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:19,204 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:19,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [884626230] [2022-01-09 22:33:19,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:33:19,204 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:19,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:19,212 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) [2022-01-09 22:33:19,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-09 22:33:19,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:33:19,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:33:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 22:33:19,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-09 22:33:19,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:19,435 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 14 proven. 5 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-01-09 22:33:19,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:19,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282676320] [2022-01-09 22:33:19,435 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:19,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884626230] [2022-01-09 22:33:19,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884626230] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:33:19,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:33:19,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-09 22:33:19,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751436965] [2022-01-09 22:33:19,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:19,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:33:19,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:19,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:33:19,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:33:19,437 INFO L87 Difference]: Start difference. First operand 112 states and 139 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-09 22:33:19,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:19,504 INFO L93 Difference]: Finished difference Result 118 states and 144 transitions. [2022-01-09 22:33:19,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-09 22:33:19,504 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 46 [2022-01-09 22:33:19,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:19,505 INFO L225 Difference]: With dead ends: 118 [2022-01-09 22:33:19,505 INFO L226 Difference]: Without dead ends: 116 [2022-01-09 22:33:19,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-09 22:33:19,506 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 6 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:19,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 241 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:33:19,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-01-09 22:33:19,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2022-01-09 22:33:19,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 65 states have internal predecessors, (69), 38 states have call successors, (38), 15 states have call predecessors, (38), 15 states have return successors, (35), 35 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-09 22:33:19,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 142 transitions. [2022-01-09 22:33:19,533 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 142 transitions. Word has length 46 [2022-01-09 22:33:19,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:19,535 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 142 transitions. [2022-01-09 22:33:19,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-01-09 22:33:19,535 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 142 transitions. [2022-01-09 22:33:19,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-09 22:33:19,540 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:19,540 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:19,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:19,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:19,752 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:19,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:19,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1802852916, now seen corresponding path program 3 times [2022-01-09 22:33:19,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:19,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783494672] [2022-01-09 22:33:19,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:19,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:19,758 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:19,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1626534142] [2022-01-09 22:33:19,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:33:19,759 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:19,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:19,760 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) [2022-01-09 22:33:19,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-09 22:33:19,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-09 22:33:19,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:33:19,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-09 22:33:19,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:19,932 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-09 22:33:19,932 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-01-09 22:33:20,210 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:20,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783494672] [2022-01-09 22:33:20,210 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:20,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626534142] [2022-01-09 22:33:20,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626534142] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:33:20,210 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:33:20,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-01-09 22:33:20,211 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302938478] [2022-01-09 22:33:20,211 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:20,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:33:20,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:20,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:33:20,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-01-09 22:33:20,212 INFO L87 Difference]: Start difference. First operand 116 states and 142 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-09 22:33:20,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:20,386 INFO L93 Difference]: Finished difference Result 142 states and 164 transitions. [2022-01-09 22:33:20,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-09 22:33:20,387 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 51 [2022-01-09 22:33:20,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:20,388 INFO L225 Difference]: With dead ends: 142 [2022-01-09 22:33:20,388 INFO L226 Difference]: Without dead ends: 131 [2022-01-09 22:33:20,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-09 22:33:20,389 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 11 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:20,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 168 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:33:20,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-09 22:33:20,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-01-09 22:33:20,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.0875) internal successors, (87), 83 states have internal predecessors, (87), 29 states have call successors, (29), 21 states have call predecessors, (29), 21 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2022-01-09 22:33:20,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 142 transitions. [2022-01-09 22:33:20,400 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 142 transitions. Word has length 51 [2022-01-09 22:33:20,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:20,400 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 142 transitions. [2022-01-09 22:33:20,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-09 22:33:20,400 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 142 transitions. [2022-01-09 22:33:20,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-09 22:33:20,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:20,401 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:20,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:20,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:20,615 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:20,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:20,616 INFO L85 PathProgramCache]: Analyzing trace with hash 616227619, now seen corresponding path program 1 times [2022-01-09 22:33:20,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:20,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433490686] [2022-01-09 22:33:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:20,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:20,624 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:20,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551699946] [2022-01-09 22:33:20,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:20,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:20,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:20,625 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) [2022-01-09 22:33:20,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-09 22:33:20,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:33:20,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-09 22:33:20,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 45 proven. 15 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-01-09 22:33:21,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:22,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433490686] [2022-01-09 22:33:22,257 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:22,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551699946] [2022-01-09 22:33:22,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551699946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:33:22,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:33:22,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-01-09 22:33:22,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296240160] [2022-01-09 22:33:22,257 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:22,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-09 22:33:22,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:22,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-09 22:33:22,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2022-01-09 22:33:22,258 INFO L87 Difference]: Start difference. First operand 131 states and 142 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-01-09 22:33:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:22,531 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2022-01-09 22:33:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 22:33:22,531 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2022-01-09 22:33:22,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:22,532 INFO L225 Difference]: With dead ends: 133 [2022-01-09 22:33:22,532 INFO L226 Difference]: Without dead ends: 124 [2022-01-09 22:33:22,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 91 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-01-09 22:33:22,533 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 16 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:22,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 138 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:33:22,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-01-09 22:33:22,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-01-09 22:33:22,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 79 states have internal predecessors, (82), 26 states have call successors, (26), 20 states have call predecessors, (26), 20 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-09 22:33:22,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2022-01-09 22:33:22,543 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 67 [2022-01-09 22:33:22,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:22,543 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2022-01-09 22:33:22,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-01-09 22:33:22,544 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2022-01-09 22:33:22,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-09 22:33:22,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:22,544 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1] [2022-01-09 22:33:22,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:22,760 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,SelfDestructingSolverStorable10 [2022-01-09 22:33:22,760 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:22,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:22,760 INFO L85 PathProgramCache]: Analyzing trace with hash -207258189, now seen corresponding path program 4 times [2022-01-09 22:33:22,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:22,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700489327] [2022-01-09 22:33:22,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:22,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:22,767 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:22,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313743261] [2022-01-09 22:33:22,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 22:33:22,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:22,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:22,768 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) [2022-01-09 22:33:22,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-09 22:33:23,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 22:33:23,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:33:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 57 conjunts are in the unsatisfiable core [2022-01-09 22:33:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 71 proven. 65 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-01-09 22:33:24,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 111 proven. 23 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-01-09 22:33:24,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:24,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700489327] [2022-01-09 22:33:24,828 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:24,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313743261] [2022-01-09 22:33:24,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313743261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:33:24,828 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:33:24,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 15 [2022-01-09 22:33:24,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258040268] [2022-01-09 22:33:24,829 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:24,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-09 22:33:24,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:24,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-09 22:33:24,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-01-09 22:33:24,830 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (21), 9 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-09 22:33:25,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:25,920 INFO L93 Difference]: Finished difference Result 134 states and 141 transitions. [2022-01-09 22:33:25,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-09 22:33:25,920 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (21), 9 states have call predecessors, (21), 8 states have call successors, (21) Word has length 74 [2022-01-09 22:33:25,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:25,921 INFO L225 Difference]: With dead ends: 134 [2022-01-09 22:33:25,921 INFO L226 Difference]: Without dead ends: 132 [2022-01-09 22:33:25,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 129 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-01-09 22:33:25,922 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:25,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 86 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-09 22:33:25,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-09 22:33:25,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2022-01-09 22:33:25,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 80 states have (on average 1.05) internal successors, (84), 82 states have internal predecessors, (84), 24 states have call successors, (24), 21 states have call predecessors, (24), 21 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-09 22:33:25,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2022-01-09 22:33:25,931 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 74 [2022-01-09 22:33:25,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:25,931 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2022-01-09 22:33:25,932 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 11 states have (on average 2.272727272727273) internal successors, (25), 9 states have internal predecessors, (25), 9 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (21), 9 states have call predecessors, (21), 8 states have call successors, (21) [2022-01-09 22:33:25,932 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2022-01-09 22:33:25,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-09 22:33:25,932 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:25,932 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:25,939 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:26,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:26,138 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:26,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:26,138 INFO L85 PathProgramCache]: Analyzing trace with hash 308615369, now seen corresponding path program 2 times [2022-01-09 22:33:26,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:26,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704992014] [2022-01-09 22:33:26,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:26,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:26,152 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:26,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857131807] [2022-01-09 22:33:26,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:33:26,153 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:26,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:26,159 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) [2022-01-09 22:33:26,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-09 22:33:26,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:33:26,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:33:26,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-09 22:33:26,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:26,516 INFO L134 CoverageAnalysis]: Checked inductivity of 536 backedges. 32 proven. 24 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-01-09 22:33:26,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:26,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:26,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704992014] [2022-01-09 22:33:26,670 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:26,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857131807] [2022-01-09 22:33:26,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857131807] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:33:26,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:33:26,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-01-09 22:33:26,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772827] [2022-01-09 22:33:26,670 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:26,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:33:26,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:26,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:33:26,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-09 22:33:26,671 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-09 22:33:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:26,797 INFO L93 Difference]: Finished difference Result 134 states and 139 transitions. [2022-01-09 22:33:26,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 22:33:26,797 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 95 [2022-01-09 22:33:26,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:26,798 INFO L225 Difference]: With dead ends: 134 [2022-01-09 22:33:26,798 INFO L226 Difference]: Without dead ends: 132 [2022-01-09 22:33:26,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:33:26,799 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:26,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 249 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:33:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-09 22:33:26,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-01-09 22:33:26,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 85 states have internal predecessors, (87), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-09 22:33:26,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 136 transitions. [2022-01-09 22:33:26,813 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 136 transitions. Word has length 95 [2022-01-09 22:33:26,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:26,814 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 136 transitions. [2022-01-09 22:33:26,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-01-09 22:33:26,814 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 136 transitions. [2022-01-09 22:33:26,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-09 22:33:26,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:26,819 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:26,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:27,035 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,SelfDestructingSolverStorable12 [2022-01-09 22:33:27,035 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:27,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:27,036 INFO L85 PathProgramCache]: Analyzing trace with hash 75049244, now seen corresponding path program 1 times [2022-01-09 22:33:27,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:27,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218718832] [2022-01-09 22:33:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:27,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:27,043 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:27,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [97856159] [2022-01-09 22:33:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:27,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:27,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:27,044 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) [2022-01-09 22:33:27,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-09 22:33:27,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 22:33:27,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 22 conjunts are in the unsatisfiable core [2022-01-09 22:33:27,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:27,368 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-01-09 22:33:27,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:27,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:27,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218718832] [2022-01-09 22:33:27,552 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:27,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97856159] [2022-01-09 22:33:27,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97856159] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:33:27,553 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:33:27,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-01-09 22:33:27,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062337801] [2022-01-09 22:33:27,553 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:27,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-09 22:33:27,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:27,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-09 22:33:27,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-01-09 22:33:27,554 INFO L87 Difference]: Start difference. First operand 131 states and 136 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-01-09 22:33:27,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:27,657 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2022-01-09 22:33:27,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 22:33:27,657 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) Word has length 100 [2022-01-09 22:33:27,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:27,658 INFO L225 Difference]: With dead ends: 138 [2022-01-09 22:33:27,658 INFO L226 Difference]: Without dead ends: 125 [2022-01-09 22:33:27,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-01-09 22:33:27,658 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 6 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:27,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 258 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:33:27,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-01-09 22:33:27,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-01-09 22:33:27,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 23 states have call successors, (23), 21 states have call predecessors, (23), 21 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-09 22:33:27,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-01-09 22:33:27,667 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 100 [2022-01-09 22:33:27,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:27,668 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-01-09 22:33:27,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 4 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (17), 4 states have call predecessors, (17), 4 states have call successors, (17) [2022-01-09 22:33:27,668 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-01-09 22:33:27,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-09 22:33:27,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:27,669 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:27,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:27,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-09 22:33:27,887 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:27,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:27,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1859389073, now seen corresponding path program 3 times [2022-01-09 22:33:27,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:27,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749048059] [2022-01-09 22:33:27,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:27,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:27,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:27,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [767725503] [2022-01-09 22:33:27,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:33:27,895 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:27,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:27,896 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:33:27,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-09 22:33:28,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 22:33:28,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:33:28,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 13 conjunts are in the unsatisfiable core [2022-01-09 22:33:28,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:28,553 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-01-09 22:33:28,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:29,060 INFO L134 CoverageAnalysis]: Checked inductivity of 930 backedges. 110 proven. 16 refuted. 0 times theorem prover too weak. 804 trivial. 0 not checked. [2022-01-09 22:33:29,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:29,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749048059] [2022-01-09 22:33:29,061 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:29,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767725503] [2022-01-09 22:33:29,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767725503] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:33:29,061 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:33:29,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-09 22:33:29,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272030057] [2022-01-09 22:33:29,061 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:29,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-09 22:33:29,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:29,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-09 22:33:29,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:33:29,062 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) [2022-01-09 22:33:31,787 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-09 22:33:33,371 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.58s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-01-09 22:33:33,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:33,403 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2022-01-09 22:33:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 22:33:33,403 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) Word has length 123 [2022-01-09 22:33:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:33,404 INFO L225 Difference]: With dead ends: 134 [2022-01-09 22:33:33,404 INFO L226 Difference]: Without dead ends: 132 [2022-01-09 22:33:33,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 232 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-01-09 22:33:33,405 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 18 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 21 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:33,405 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 164 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 177 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2022-01-09 22:33:33,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-09 22:33:33,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2022-01-09 22:33:33,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 83 states have (on average 1.036144578313253) internal successors, (86), 85 states have internal predecessors, (86), 25 states have call successors, (25), 22 states have call predecessors, (25), 22 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-09 22:33:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2022-01-09 22:33:33,415 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 123 [2022-01-09 22:33:33,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:33,415 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2022-01-09 22:33:33,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 9 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 4 states have call predecessors, (16), 6 states have call successors, (16) [2022-01-09 22:33:33,415 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2022-01-09 22:33:33,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-01-09 22:33:33,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:33,416 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:33,423 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-09 22:33:33,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-09 22:33:33,622 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:33,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1602424598, now seen corresponding path program 2 times [2022-01-09 22:33:33,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:33,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594690658] [2022-01-09 22:33:33,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:33,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:33,635 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:33,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1524679532] [2022-01-09 22:33:33,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:33:33,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:33,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:33,640 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:33:33,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-09 22:33:33,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:33:33,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:33:33,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 11 conjunts are in the unsatisfiable core [2022-01-09 22:33:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 120 proven. 656 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2022-01-09 22:33:33,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 938 backedges. 42 proven. 56 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-01-09 22:33:34,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:34,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594690658] [2022-01-09 22:33:34,094 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:34,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524679532] [2022-01-09 22:33:34,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524679532] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:33:34,094 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:33:34,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-01-09 22:33:34,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661969291] [2022-01-09 22:33:34,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:34,095 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 22:33:34,095 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:34,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 22:33:34,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-01-09 22:33:34,095 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2022-01-09 22:33:34,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:34,417 INFO L93 Difference]: Finished difference Result 390 states and 406 transitions. [2022-01-09 22:33:34,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-09 22:33:34,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) Word has length 125 [2022-01-09 22:33:34,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:34,419 INFO L225 Difference]: With dead ends: 390 [2022-01-09 22:33:34,419 INFO L226 Difference]: Without dead ends: 365 [2022-01-09 22:33:34,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-01-09 22:33:34,420 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 197 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:34,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 250 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 22:33:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-01-09 22:33:34,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 313. [2022-01-09 22:33:34,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 196 states have (on average 1.0459183673469388) internal successors, (205), 203 states have internal predecessors, (205), 63 states have call successors, (63), 54 states have call predecessors, (63), 53 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-01-09 22:33:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 329 transitions. [2022-01-09 22:33:34,443 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 329 transitions. Word has length 125 [2022-01-09 22:33:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:34,443 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 329 transitions. [2022-01-09 22:33:34,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 9 states have call successors, (43), 6 states have call predecessors, (43), 6 states have return successors, (42), 9 states have call predecessors, (42), 9 states have call successors, (42) [2022-01-09 22:33:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 329 transitions. [2022-01-09 22:33:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-09 22:33:34,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:34,444 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:34,460 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-09 22:33:34,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-09 22:33:34,660 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash 709017654, now seen corresponding path program 2 times [2022-01-09 22:33:34,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:34,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214929189] [2022-01-09 22:33:34,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:34,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:34,667 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:34,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [203642549] [2022-01-09 22:33:34,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 22:33:34,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:34,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:34,673 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:33:34,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-09 22:33:34,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 22:33:34,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:33:34,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-09 22:33:34,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:33:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1016 backedges. 44 proven. 48 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-01-09 22:33:35,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:33:35,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:33:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214929189] [2022-01-09 22:33:35,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:33:35,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203642549] [2022-01-09 22:33:35,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203642549] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 22:33:35,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-09 22:33:35,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-01-09 22:33:35,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102400614] [2022-01-09 22:33:35,396 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-09 22:33:35,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 22:33:35,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:33:35,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 22:33:35,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-01-09 22:33:35,397 INFO L87 Difference]: Start difference. First operand 313 states and 329 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-01-09 22:33:35,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 22:33:35,586 INFO L93 Difference]: Finished difference Result 323 states and 338 transitions. [2022-01-09 22:33:35,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 22:33:35,586 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 128 [2022-01-09 22:33:35,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 22:33:35,587 INFO L225 Difference]: With dead ends: 323 [2022-01-09 22:33:35,587 INFO L226 Difference]: Without dead ends: 312 [2022-01-09 22:33:35,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-01-09 22:33:35,588 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 6 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 22:33:35,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 340 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 22:33:35,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-09 22:33:35,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-01-09 22:33:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 196 states have (on average 1.0408163265306123) internal successors, (204), 202 states have internal predecessors, (204), 62 states have call successors, (62), 54 states have call predecessors, (62), 53 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-01-09 22:33:35,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 326 transitions. [2022-01-09 22:33:35,629 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 326 transitions. Word has length 128 [2022-01-09 22:33:35,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 22:33:35,629 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 326 transitions. [2022-01-09 22:33:35,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2022-01-09 22:33:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 326 transitions. [2022-01-09 22:33:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-09 22:33:35,630 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 22:33:35,630 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 27, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 22:33:35,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-09 22:33:35,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:35,843 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 22:33:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 22:33:35,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1972302768, now seen corresponding path program 3 times [2022-01-09 22:33:35,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 22:33:35,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136422625] [2022-01-09 22:33:35,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 22:33:35,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 22:33:35,850 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 22:33:35,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041684433] [2022-01-09 22:33:35,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 22:33:35,851 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 22:33:35,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 22:33:35,852 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 22:33:35,853 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-09 22:33:37,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-09 22:33:37,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 22:33:37,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 43 conjunts are in the unsatisfiable core [2022-01-09 22:33:37,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 22:34:25,319 WARN L228 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-01-09 22:34:25,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 366 proven. 76 refuted. 0 times theorem prover too weak. 1096 trivial. 0 not checked. [2022-01-09 22:34:25,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 22:34:31,135 INFO L134 CoverageAnalysis]: Checked inductivity of 1538 backedges. 271 proven. 34 refuted. 0 times theorem prover too weak. 1233 trivial. 0 not checked. [2022-01-09 22:34:31,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 22:34:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136422625] [2022-01-09 22:34:31,136 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 22:34:31,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041684433] [2022-01-09 22:34:31,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041684433] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 22:34:31,136 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 22:34:31,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2022-01-09 22:34:31,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867213941] [2022-01-09 22:34:31,137 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 22:34:31,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-09 22:34:31,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 22:34:31,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-09 22:34:31,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-01-09 22:34:31,140 INFO L87 Difference]: Start difference. First operand 312 states and 326 transitions. Second operand has 18 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 11 states have internal predecessors, (27), 11 states have call successors, (26), 2 states have call predecessors, (26), 2 states have return successors, (26), 10 states have call predecessors, (26), 9 states have call successors, (26)