/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/array-patterns/array15_pattern.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-a10ec3b [2022-01-09 23:14:43,483 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-09 23:14:43,486 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-09 23:14:43,555 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-09 23:14:43,598 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-09 23:14:43,599 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-09 23:14:43,599 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-09 23:14:43,600 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 23:14:43,627 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-09 23:14:43,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-09 23:14:43,628 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-09 23:14:43,628 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-09 23:14:43,629 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-09 23:14:43,629 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-09 23:14:43,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-09 23:14:43,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-09 23:14:43,630 INFO L138 SettingsManager]: * Use SBE=true [2022-01-09 23:14:43,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-09 23:14:43,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-09 23:14:43,631 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-09 23:14:43,631 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-09 23:14:43,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-09 23:14:43,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-09 23:14:43,631 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2022-01-09 23:14:43,631 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-09 23:14:43,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-09 23:14:43,631 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-09 23:14:43,632 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-09 23:14:43,632 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-09 23:14:43,632 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:14:43,632 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-09 23:14:43,632 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-09 23:14:43,633 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-09 23:14:43,633 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-09 23:14:43,633 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-09 23:14:43,633 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-09 23:14:43,634 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-01-09 23:14:43,634 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-09 23:14:43,634 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-09 23:14:43,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-09 23:14:43,877 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-09 23:14:43,879 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-09 23:14:43,880 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-09 23:14:43,880 INFO L275 PluginConnector]: CDTParser initialized [2022-01-09 23:14:43,881 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-patterns/array15_pattern.c [2022-01-09 23:14:43,944 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3b7c5fc7/147086aeaa0a4c279eb55fce9f13ba27/FLAG0201dd186 [2022-01-09 23:14:44,312 INFO L306 CDTParser]: Found 1 translation units. [2022-01-09 23:14:44,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array15_pattern.c [2022-01-09 23:14:44,324 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3b7c5fc7/147086aeaa0a4c279eb55fce9f13ba27/FLAG0201dd186 [2022-01-09 23:14:44,339 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e3b7c5fc7/147086aeaa0a4c279eb55fce9f13ba27 [2022-01-09 23:14:44,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-09 23:14:44,342 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2022-01-09 23:14:44,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-09 23:14:44,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-09 23:14:44,348 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-09 23:14:44,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,350 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6056fcf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44, skipping insertion in model container [2022-01-09 23:14:44,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,356 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-09 23:14:44,372 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-09 23:14:44,554 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array15_pattern.c[1424,1437] [2022-01-09 23:14:44,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:14:44,600 INFO L203 MainTranslator]: Completed pre-run [2022-01-09 23:14:44,613 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-patterns/array15_pattern.c[1424,1437] [2022-01-09 23:14:44,635 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-09 23:14:44,646 INFO L208 MainTranslator]: Completed translation [2022-01-09 23:14:44,647 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44 WrapperNode [2022-01-09 23:14:44,648 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-09 23:14:44,649 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-09 23:14:44,650 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-09 23:14:44,650 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-09 23:14:44,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,669 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,692 INFO L137 Inliner]: procedures = 16, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2022-01-09 23:14:44,693 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-09 23:14:44,694 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-09 23:14:44,694 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-09 23:14:44,694 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-09 23:14:44,701 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,702 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,722 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,726 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-09 23:14:44,728 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-09 23:14:44,728 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-09 23:14:44,728 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-09 23:14:44,730 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (1/1) ... [2022-01-09 23:14:44,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-09 23:14:44,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:44,788 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-09 23:14:44,796 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 23:14:44,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-09 23:14:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-09 23:14:44,823 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-09 23:14:44,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-09 23:14:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-09 23:14:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-09 23:14:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-09 23:14:44,824 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-09 23:14:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-09 23:14:44,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-09 23:14:44,885 INFO L234 CfgBuilder]: Building ICFG [2022-01-09 23:14:44,887 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-09 23:14:45,051 INFO L275 CfgBuilder]: Performing block encoding [2022-01-09 23:14:45,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-09 23:14:45,056 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-01-09 23:14:45,058 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:14:45 BoogieIcfgContainer [2022-01-09 23:14:45,058 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-09 23:14:45,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-09 23:14:45,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-09 23:14:45,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-09 23:14:45,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.01 11:14:44" (1/3) ... [2022-01-09 23:14:45,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af1805b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:14:45, skipping insertion in model container [2022-01-09 23:14:45,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.01 11:14:44" (2/3) ... [2022-01-09 23:14:45,064 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@af1805b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.01 11:14:45, skipping insertion in model container [2022-01-09 23:14:45,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.01 11:14:45" (3/3) ... [2022-01-09 23:14:45,065 INFO L111 eAbstractionObserver]: Analyzing ICFG array15_pattern.c [2022-01-09 23:14:45,070 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-09 23:14:45,070 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-09 23:14:45,113 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-09 23:14:45,118 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 23:14:45,118 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-09 23:14:45,129 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:45,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-09 23:14:45,133 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:45,133 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:45,134 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:45,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:45,137 INFO L85 PathProgramCache]: Analyzing trace with hash 179087049, now seen corresponding path program 1 times [2022-01-09 23:14:45,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:45,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635742022] [2022-01-09 23:14:45,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:45,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:45,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:45,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-01-09 23:14:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:45,248 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 23:14:45,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:45,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635742022] [2022-01-09 23:14:45,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635742022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:14:45,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:14:45,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-09 23:14:45,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402964419] [2022-01-09 23:14:45,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:14:45,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-01-09 23:14:45,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:45,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-01-09 23:14:45,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-01-09 23:14:45,273 INFO L87 Difference]: Start difference. First operand has 32 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-09 23:14:45,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:45,294 INFO L93 Difference]: Finished difference Result 61 states and 93 transitions. [2022-01-09 23:14:45,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-01-09 23:14:45,297 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-09 23:14:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:45,301 INFO L225 Difference]: With dead ends: 61 [2022-01-09 23:14:45,301 INFO L226 Difference]: Without dead ends: 28 [2022-01-09 23:14:45,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 23:14:45,307 INFO L933 BasicCegarLoop]: 39 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, 39 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 23:14:45,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:14:45,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-01-09 23:14:45,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-01-09 23:14:45,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:45,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2022-01-09 23:14:45,334 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2022-01-09 23:14:45,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:45,335 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2022-01-09 23:14:45,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-09 23:14:45,335 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2022-01-09 23:14:45,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-09 23:14:45,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:45,338 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:45,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-09 23:14:45,338 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:45,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1195633489, now seen corresponding path program 1 times [2022-01-09 23:14:45,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:45,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665014609] [2022-01-09 23:14:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:45,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:45,359 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:45,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276724134] [2022-01-09 23:14:45,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:45,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:45,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:45,365 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 23:14:45,366 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 23:14:45,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-09 23:14:45,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:45,511 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:14:45,511 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:14:45,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:45,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665014609] [2022-01-09 23:14:45,512 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:45,512 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276724134] [2022-01-09 23:14:45,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276724134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:14:45,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:14:45,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-09 23:14:45,513 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699587302] [2022-01-09 23:14:45,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:14:45,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-09 23:14:45,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:45,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-09 23:14:45,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-01-09 23:14:45,514 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:14:45,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:45,590 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2022-01-09 23:14:45,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-09 23:14:45,591 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2022-01-09 23:14:45,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:45,591 INFO L225 Difference]: With dead ends: 60 [2022-01-09 23:14:45,592 INFO L226 Difference]: Without dead ends: 40 [2022-01-09 23:14:45,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:14:45,593 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 47 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:45,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 53 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-09 23:14:45,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2022-01-09 23:14:45,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:45,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-01-09 23:14:45,598 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 29 [2022-01-09 23:14:45,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:45,599 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-01-09 23:14:45,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:14:45,599 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-01-09 23:14:45,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-09 23:14:45,599 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:45,600 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:45,618 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-09 23:14:45,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:45,816 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:45,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:45,816 INFO L85 PathProgramCache]: Analyzing trace with hash -712222617, now seen corresponding path program 1 times [2022-01-09 23:14:45,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:45,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265301762] [2022-01-09 23:14:45,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:45,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:45,826 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:45,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592598069] [2022-01-09 23:14:45,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:45,827 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:45,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:45,833 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 23:14:45,838 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 23:14:45,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:45,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-09 23:14:45,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:45,945 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 23:14:45,945 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-09 23:14:45,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:45,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265301762] [2022-01-09 23:14:45,946 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:45,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592598069] [2022-01-09 23:14:45,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592598069] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-09 23:14:45,946 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-09 23:14:45,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-09 23:14:45,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481858771] [2022-01-09 23:14:45,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-09 23:14:45,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-09 23:14:45,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:45,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-09 23:14:45,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-09 23:14:45,947 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:14:45,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:45,980 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2022-01-09 23:14:45,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-09 23:14:45,980 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2022-01-09 23:14:45,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:45,981 INFO L225 Difference]: With dead ends: 63 [2022-01-09 23:14:45,981 INFO L226 Difference]: Without dead ends: 38 [2022-01-09 23:14:45,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-09 23:14:45,982 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 24 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:45,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 49 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-09 23:14:45,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-01-09 23:14:45,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2022-01-09 23:14:45,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2) internal successors, (36), 30 states have internal predecessors, (36), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:45,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2022-01-09 23:14:45,987 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 35 [2022-01-09 23:14:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:45,987 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2022-01-09 23:14:45,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:14:45,987 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2022-01-09 23:14:45,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-09 23:14:45,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:45,988 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:46,006 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 23:14:46,202 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-01-09 23:14:46,203 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:46,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:46,203 INFO L85 PathProgramCache]: Analyzing trace with hash -459431893, now seen corresponding path program 1 times [2022-01-09 23:14:46,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:46,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875298471] [2022-01-09 23:14:46,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:46,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:46,218 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:46,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1469807705] [2022-01-09 23:14:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:46,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:46,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:46,235 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 23:14:46,259 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 23:14:46,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:46,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 23:14:46,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:46,537 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-09 23:14:46,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:46,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-01-09 23:14:46,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:46,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875298471] [2022-01-09 23:14:46,883 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:46,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469807705] [2022-01-09 23:14:46,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469807705] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:46,884 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:46,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2022-01-09 23:14:46,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703270430] [2022-01-09 23:14:46,884 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:46,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-09 23:14:46,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:46,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-09 23:14:46,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2022-01-09 23:14:46,886 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-09 23:14:47,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:47,217 INFO L93 Difference]: Finished difference Result 107 states and 126 transitions. [2022-01-09 23:14:47,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-09 23:14:47,217 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 39 [2022-01-09 23:14:47,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:47,219 INFO L225 Difference]: With dead ends: 107 [2022-01-09 23:14:47,219 INFO L226 Difference]: Without dead ends: 85 [2022-01-09 23:14:47,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2022-01-09 23:14:47,221 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 113 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:47,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 163 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:14:47,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-01-09 23:14:47,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 60. [2022-01-09 23:14:47,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 49 states have (on average 1.2040816326530612) internal successors, (59), 50 states have internal predecessors, (59), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 23:14:47,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-01-09 23:14:47,228 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 39 [2022-01-09 23:14:47,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:47,228 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-01-09 23:14:47,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 15 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2022-01-09 23:14:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-01-09 23:14:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-09 23:14:47,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:47,229 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:47,261 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 23:14:47,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:47,448 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:47,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:47,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1046237907, now seen corresponding path program 1 times [2022-01-09 23:14:47,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:47,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621931324] [2022-01-09 23:14:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:47,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:47,467 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:47,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [123552009] [2022-01-09 23:14:47,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:47,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:47,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:47,484 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 23:14:47,502 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 23:14:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:14:47,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-09 23:14:47,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:47,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-01-09 23:14:47,874 INFO L353 Elim1Store]: treesize reduction 52, result has 11.9 percent of original size [2022-01-09 23:14:47,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 27 [2022-01-09 23:14:48,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-01-09 23:14:48,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:14:48,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:48,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-01-09 23:14:48,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 44 [2022-01-09 23:14:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 23:14:49,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:49,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621931324] [2022-01-09 23:14:49,079 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:49,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123552009] [2022-01-09 23:14:49,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123552009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:49,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:49,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2022-01-09 23:14:49,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790976001] [2022-01-09 23:14:49,081 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:49,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-09 23:14:49,081 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:49,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-09 23:14:49,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-01-09 23:14:49,082 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-09 23:14:49,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:49,334 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2022-01-09 23:14:49,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-09 23:14:49,334 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 39 [2022-01-09 23:14:49,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:49,338 INFO L225 Difference]: With dead ends: 92 [2022-01-09 23:14:49,338 INFO L226 Difference]: Without dead ends: 88 [2022-01-09 23:14:49,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=380, Unknown=0, NotChecked=0, Total=506 [2022-01-09 23:14:49,341 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 81 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:49,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 161 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 220 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-01-09 23:14:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-09 23:14:49,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 77. [2022-01-09 23:14:49,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 63 states have (on average 1.2063492063492063) internal successors, (76), 64 states have internal predecessors, (76), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-09 23:14:49,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2022-01-09 23:14:49,369 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 39 [2022-01-09 23:14:49,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:49,369 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2022-01-09 23:14:49,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-09 23:14:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2022-01-09 23:14:49,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-09 23:14:49,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:49,377 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:49,399 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 23:14:49,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:49,594 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:49,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:49,594 INFO L85 PathProgramCache]: Analyzing trace with hash -252023569, now seen corresponding path program 2 times [2022-01-09 23:14:49,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:49,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273022114] [2022-01-09 23:14:49,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:49,595 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:49,604 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:49,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985636105] [2022-01-09 23:14:49,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:14:49,605 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:49,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:49,612 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 23:14:49,613 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 23:14:49,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:14:49,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:49,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:14:49,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:49,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:14:49,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-09 23:14:49,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:49,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273022114] [2022-01-09 23:14:49,876 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:49,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985636105] [2022-01-09 23:14:49,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985636105] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:49,876 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:49,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-09 23:14:49,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382338332] [2022-01-09 23:14:49,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:49,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:14:49,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:49,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:14:49,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:14:49,878 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:50,015 INFO L93 Difference]: Finished difference Result 155 states and 184 transitions. [2022-01-09 23:14:50,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 23:14:50,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-01-09 23:14:50,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:50,018 INFO L225 Difference]: With dead ends: 155 [2022-01-09 23:14:50,018 INFO L226 Difference]: Without dead ends: 117 [2022-01-09 23:14:50,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:14:50,021 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 111 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:50,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 131 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:50,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-01-09 23:14:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 90. [2022-01-09 23:14:50,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 76 states have (on average 1.1842105263157894) internal successors, (90), 77 states have internal predecessors, (90), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-09 23:14:50,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2022-01-09 23:14:50,047 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 41 [2022-01-09 23:14:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:50,047 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2022-01-09 23:14:50,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2022-01-09 23:14:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-01-09 23:14:50,048 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:50,049 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:50,081 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 23:14:50,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:50,265 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:50,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:50,266 INFO L85 PathProgramCache]: Analyzing trace with hash 796161581, now seen corresponding path program 2 times [2022-01-09 23:14:50,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:50,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103519161] [2022-01-09 23:14:50,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:50,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:50,292 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:50,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199388360] [2022-01-09 23:14:50,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:14:50,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:50,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:50,295 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 23:14:50,296 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 23:14:50,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:14:50,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:50,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:14:50,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-01-09 23:14:50,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-01-09 23:14:50,743 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:50,743 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103519161] [2022-01-09 23:14:50,745 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:50,745 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199388360] [2022-01-09 23:14:50,746 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199388360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:50,746 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:50,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-09 23:14:50,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947375993] [2022-01-09 23:14:50,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:50,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-09 23:14:50,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:50,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-09 23:14:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-01-09 23:14:50,748 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:50,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:50,956 INFO L93 Difference]: Finished difference Result 167 states and 203 transitions. [2022-01-09 23:14:50,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-09 23:14:50,956 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-01-09 23:14:50,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:50,957 INFO L225 Difference]: With dead ends: 167 [2022-01-09 23:14:50,957 INFO L226 Difference]: Without dead ends: 120 [2022-01-09 23:14:50,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2022-01-09 23:14:50,959 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 45 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:50,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 91 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:50,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-09 23:14:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 104. [2022-01-09 23:14:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 90 states have (on average 1.2) internal successors, (108), 91 states have internal predecessors, (108), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-09 23:14:50,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 124 transitions. [2022-01-09 23:14:50,992 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 124 transitions. Word has length 41 [2022-01-09 23:14:50,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:50,992 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 124 transitions. [2022-01-09 23:14:50,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:50,992 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 124 transitions. [2022-01-09 23:14:50,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-09 23:14:50,994 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:50,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:51,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-01-09 23:14:51,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:51,215 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:51,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:51,215 INFO L85 PathProgramCache]: Analyzing trace with hash 178867369, now seen corresponding path program 3 times [2022-01-09 23:14:51,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:51,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513553297] [2022-01-09 23:14:51,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:51,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:51,227 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:51,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1064508934] [2022-01-09 23:14:51,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:14:51,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:51,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:51,232 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 23:14:51,233 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 23:14:51,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-09 23:14:51,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:51,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:14:51,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-09 23:14:51,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:51,569 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-01-09 23:14:51,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513553297] [2022-01-09 23:14:51,570 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:51,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064508934] [2022-01-09 23:14:51,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064508934] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:51,570 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:51,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-09 23:14:51,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263556154] [2022-01-09 23:14:51,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:51,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:14:51,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:51,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:14:51,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:14:51,571 INFO L87 Difference]: Start difference. First operand 104 states and 124 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:51,726 INFO L93 Difference]: Finished difference Result 165 states and 192 transitions. [2022-01-09 23:14:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 23:14:51,726 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 44 [2022-01-09 23:14:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:51,728 INFO L225 Difference]: With dead ends: 165 [2022-01-09 23:14:51,728 INFO L226 Difference]: Without dead ends: 132 [2022-01-09 23:14:51,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:14:51,730 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 80 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:51,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 101 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:51,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-01-09 23:14:51,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 106. [2022-01-09 23:14:51,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 92 states have (on average 1.1956521739130435) internal successors, (110), 93 states have internal predecessors, (110), 8 states have call successors, (8), 5 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-09 23:14:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 126 transitions. [2022-01-09 23:14:51,757 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 126 transitions. Word has length 44 [2022-01-09 23:14:51,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:51,757 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 126 transitions. [2022-01-09 23:14:51,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:51,757 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 126 transitions. [2022-01-09 23:14:51,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-01-09 23:14:51,758 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:51,758 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:51,785 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 23:14:51,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:51,975 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:51,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:51,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1693722629, now seen corresponding path program 3 times [2022-01-09 23:14:51,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:51,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232043129] [2022-01-09 23:14:51,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:51,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:51,984 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:51,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1905465009] [2022-01-09 23:14:51,984 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:14:51,984 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:51,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:51,995 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 23:14:51,996 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 23:14:52,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-09 23:14:52,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:52,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjunts are in the unsatisfiable core [2022-01-09 23:14:52,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-01-09 23:14:52,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:52,656 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-01-09 23:14:52,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:52,656 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232043129] [2022-01-09 23:14:52,656 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:52,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905465009] [2022-01-09 23:14:52,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905465009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:52,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:52,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2022-01-09 23:14:52,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005159542] [2022-01-09 23:14:52,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:52,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-09 23:14:52,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:52,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-09 23:14:52,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2022-01-09 23:14:52,658 INFO L87 Difference]: Start difference. First operand 106 states and 126 transitions. Second operand has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-09 23:14:53,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:53,001 INFO L93 Difference]: Finished difference Result 143 states and 169 transitions. [2022-01-09 23:14:53,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-09 23:14:53,002 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 48 [2022-01-09 23:14:53,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:53,002 INFO L225 Difference]: With dead ends: 143 [2022-01-09 23:14:53,003 INFO L226 Difference]: Without dead ends: 139 [2022-01-09 23:14:53,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=263, Invalid=859, Unknown=0, NotChecked=0, Total=1122 [2022-01-09 23:14:53,004 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 122 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:53,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 165 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 326 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:14:53,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-01-09 23:14:53,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 90. [2022-01-09 23:14:53,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 80 states have internal predecessors, (94), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-09 23:14:53,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2022-01-09 23:14:53,029 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 48 [2022-01-09 23:14:53,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:53,029 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2022-01-09 23:14:53,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.473684210526316) internal successors, (47), 16 states have internal predecessors, (47), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-09 23:14:53,029 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2022-01-09 23:14:53,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-01-09 23:14:53,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:53,030 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:53,048 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 23:14:53,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-09 23:14:53,250 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:53,250 INFO L85 PathProgramCache]: Analyzing trace with hash 857043023, now seen corresponding path program 4 times [2022-01-09 23:14:53,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:53,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893459362] [2022-01-09 23:14:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:53,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:53,259 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:53,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2005909114] [2022-01-09 23:14:53,260 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:14:53,260 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:53,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:53,275 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 23:14:53,282 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 23:14:53,317 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:14:53,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:53,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:14:53,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-01-09 23:14:53,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:53,502 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-01-09 23:14:53,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:53,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893459362] [2022-01-09 23:14:53,503 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:53,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005909114] [2022-01-09 23:14:53,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005909114] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:53,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:53,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-01-09 23:14:53,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033185656] [2022-01-09 23:14:53,503 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:53,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-09 23:14:53,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:53,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-09 23:14:53,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-01-09 23:14:53,504 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:53,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:53,619 INFO L93 Difference]: Finished difference Result 130 states and 148 transitions. [2022-01-09 23:14:53,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-09 23:14:53,620 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 49 [2022-01-09 23:14:53,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:53,621 INFO L225 Difference]: With dead ends: 130 [2022-01-09 23:14:53,621 INFO L226 Difference]: Without dead ends: 64 [2022-01-09 23:14:53,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2022-01-09 23:14:53,621 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 75 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:53,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 90 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:53,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-09 23:14:53,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 56. [2022-01-09 23:14:53,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:53,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-01-09 23:14:53,626 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 49 [2022-01-09 23:14:53,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:53,627 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-01-09 23:14:53,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:53,627 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-01-09 23:14:53,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-09 23:14:53,627 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:53,627 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:53,649 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 23:14:53,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-01-09 23:14:53,840 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:53,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:53,841 INFO L85 PathProgramCache]: Analyzing trace with hash 835598415, now seen corresponding path program 4 times [2022-01-09 23:14:53,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:53,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776401384] [2022-01-09 23:14:53,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:53,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:53,848 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:53,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [24665828] [2022-01-09 23:14:53,848 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-09 23:14:53,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:53,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:53,849 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 23:14:53,863 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 23:14:53,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-09 23:14:53,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:53,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-09 23:14:53,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:53,997 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-01-09 23:14:53,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:14:54,095 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 20 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-01-09 23:14:54,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:14:54,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776401384] [2022-01-09 23:14:54,095 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:14:54,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24665828] [2022-01-09 23:14:54,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24665828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:14:54,096 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:14:54,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2022-01-09 23:14:54,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609196970] [2022-01-09 23:14:54,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:14:54,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-09 23:14:54,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:14:54,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-09 23:14:54,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-09 23:14:54,097 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:54,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:14:54,203 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2022-01-09 23:14:54,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-09 23:14:54,205 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 55 [2022-01-09 23:14:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:14:54,206 INFO L225 Difference]: With dead ends: 63 [2022-01-09 23:14:54,206 INFO L226 Difference]: Without dead ends: 57 [2022-01-09 23:14:54,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:14:54,207 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:14:54,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 118 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:14:54,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-01-09 23:14:54,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2022-01-09 23:14:54,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 48 states have internal predecessors, (56), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-09 23:14:54,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2022-01-09 23:14:54,211 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 55 [2022-01-09 23:14:54,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:14:54,212 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2022-01-09 23:14:54,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:14:54,212 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2022-01-09 23:14:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-09 23:14:54,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:14:54,212 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:14:54,230 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 23:14:54,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-01-09 23:14:54,430 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:14:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:14:54,435 INFO L85 PathProgramCache]: Analyzing trace with hash 11450257, now seen corresponding path program 5 times [2022-01-09 23:14:54,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:14:54,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198140730] [2022-01-09 23:14:54,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:14:54,436 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:14:54,459 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:14:54,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322035936] [2022-01-09 23:14:54,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:14:54,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:14:54,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:14:54,460 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 23:14:54,461 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 23:14:54,578 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-09 23:14:54,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:14:54,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 59 conjunts are in the unsatisfiable core [2022-01-09 23:14:54,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:14:54,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-09 23:14:54,702 INFO L353 Elim1Store]: treesize reduction 65, result has 20.7 percent of original size [2022-01-09 23:14:54,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-01-09 23:14:54,981 INFO L353 Elim1Store]: treesize reduction 168, result has 18.4 percent of original size [2022-01-09 23:14:54,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 60 [2022-01-09 23:14:55,113 INFO L353 Elim1Store]: treesize reduction 167, result has 17.3 percent of original size [2022-01-09 23:14:55,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 56 [2022-01-09 23:14:56,082 INFO L353 Elim1Store]: treesize reduction 233, result has 31.3 percent of original size [2022-01-09 23:14:56,083 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 67 treesize of output 134 [2022-01-09 23:15:10,646 INFO L353 Elim1Store]: treesize reduction 276, result has 22.3 percent of original size [2022-01-09 23:15:10,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 158 treesize of output 160 [2022-01-09 23:15:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:15:11,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:13,970 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~index1~0#1| Int) (v_ArrVal_183 Int) (|v_ULTIMATE.start_main_~column~0#1_79| Int) (|ULTIMATE.start_main_~index2~0#1| Int)) (or (< (+ |v_ULTIMATE.start_main_~column~0#1_79| 1) c_~ARR_SIZE~0) (<= (let ((.cse1 (* c_~ARR_SIZE~0 4))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ (* |ULTIMATE.start_main_~index1~0#1| .cse1) |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index2~0#1| 4)) v_ArrVal_183))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| 2 (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| .cse1)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* |v_ULTIMATE.start_main_~column~0#1_79| 4))) (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| .cse1 4))))) (* c_~ARR_SIZE~0 2)) (not (< |v_ULTIMATE.start_main_~column~0#1_79| c_~ARR_SIZE~0)) (not (<= v_ArrVal_183 |c_ULTIMATE.start_main_#t~ite10#1|)))) is different from false [2022-01-09 23:15:16,115 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~index1~0#1| Int) (v_ArrVal_183 Int) (|v_ULTIMATE.start_main_~column~0#1_79| Int) (|ULTIMATE.start_main_~index2~0#1| Int)) (or (< (+ |v_ULTIMATE.start_main_~column~0#1_79| 1) c_~ARR_SIZE~0) (<= (let ((.cse1 (* c_~ARR_SIZE~0 4))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#array~0#1.base|) (+ (* |ULTIMATE.start_main_~index1~0#1| .cse1) |c_ULTIMATE.start_main_~#array~0#1.offset| (* |ULTIMATE.start_main_~index2~0#1| 4)) v_ArrVal_183))) (+ (select .cse0 |c_ULTIMATE.start_main_~#array~0#1.offset|) |c_ULTIMATE.start_main_~sum~0#1| 2 (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| .cse1)) (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| (* |v_ULTIMATE.start_main_~column~0#1_79| 4))) (select .cse0 (+ |c_ULTIMATE.start_main_~#array~0#1.offset| .cse1 4))))) (* c_~ARR_SIZE~0 2)) (< (* |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1| |c_ULTIMATE.start_main_~num~0#1|) v_ArrVal_183) (not (< |v_ULTIMATE.start_main_~column~0#1_79| c_~ARR_SIZE~0)))) is different from false [2022-01-09 23:15:16,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:16,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198140730] [2022-01-09 23:15:16,212 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:16,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322035936] [2022-01-09 23:15:16,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322035936] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:15:16,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:15:16,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2022-01-09 23:15:16,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55019686] [2022-01-09 23:15:16,213 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:16,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-09 23:15:16,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:16,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-09 23:15:16,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1497, Unknown=3, NotChecked=162, Total=1892 [2022-01-09 23:15:16,214 INFO L87 Difference]: Start difference. First operand 54 states and 62 transitions. Second operand has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:15:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:16,284 INFO L93 Difference]: Finished difference Result 99 states and 116 transitions. [2022-01-09 23:15:16,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-09 23:15:16,285 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-01-09 23:15:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:16,285 INFO L225 Difference]: With dead ends: 99 [2022-01-09 23:15:16,285 INFO L226 Difference]: Without dead ends: 95 [2022-01-09 23:15:16,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=236, Invalid=1575, Unknown=3, NotChecked=166, Total=1980 [2022-01-09 23:15:16,286 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 26 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:16,286 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 235 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 57 Invalid, 0 Unknown, 221 Unchecked, 0.0s Time] [2022-01-09 23:15:16,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-01-09 23:15:16,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2022-01-09 23:15:16,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 81 states have (on average 1.1851851851851851) internal successors, (96), 81 states have internal predecessors, (96), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-09 23:15:16,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2022-01-09 23:15:16,297 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 57 [2022-01-09 23:15:16,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:16,297 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2022-01-09 23:15:16,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6) internal successors, (48), 30 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:15:16,297 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2022-01-09 23:15:16,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-01-09 23:15:16,297 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:16,297 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:16,325 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 23:15:16,498 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-01-09 23:15:16,498 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:16,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:16,499 INFO L85 PathProgramCache]: Analyzing trace with hash 230304975, now seen corresponding path program 5 times [2022-01-09 23:15:16,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:16,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841077035] [2022-01-09 23:15:16,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:16,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:16,505 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:16,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12746005] [2022-01-09 23:15:16,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-09 23:15:16,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:16,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:16,507 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 23:15:16,508 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 23:15:16,632 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-01-09 23:15:16,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:15:16,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 62 conjunts are in the unsatisfiable core [2022-01-09 23:15:16,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:16,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-09 23:15:16,728 INFO L353 Elim1Store]: treesize reduction 65, result has 20.7 percent of original size [2022-01-09 23:15:16,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2022-01-09 23:15:16,937 INFO L353 Elim1Store]: treesize reduction 172, result has 18.5 percent of original size [2022-01-09 23:15:16,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 61 [2022-01-09 23:15:17,052 INFO L353 Elim1Store]: treesize reduction 172, result has 17.3 percent of original size [2022-01-09 23:15:17,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 57 [2022-01-09 23:15:18,069 INFO L353 Elim1Store]: treesize reduction 385, result has 11.1 percent of original size [2022-01-09 23:15:18,070 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 81 treesize of output 76 [2022-01-09 23:15:19,141 INFO L353 Elim1Store]: treesize reduction 229, result has 3.0 percent of original size [2022-01-09 23:15:19,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 75 treesize of output 25 [2022-01-09 23:15:19,197 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-09 23:15:19,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:21,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841077035] [2022-01-09 23:15:21,266 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:21,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12746005] [2022-01-09 23:15:21,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12746005] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-09 23:15:21,266 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-01-09 23:15:21,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2022-01-09 23:15:21,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424832132] [2022-01-09 23:15:21,266 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:21,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-09 23:15:21,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:21,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-09 23:15:21,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1518, Unknown=1, NotChecked=0, Total=1806 [2022-01-09 23:15:21,268 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:15:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:21,496 INFO L93 Difference]: Finished difference Result 123 states and 144 transitions. [2022-01-09 23:15:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-09 23:15:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2022-01-09 23:15:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:21,497 INFO L225 Difference]: With dead ends: 123 [2022-01-09 23:15:21,497 INFO L226 Difference]: Without dead ends: 119 [2022-01-09 23:15:21,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=322, Invalid=1747, Unknown=1, NotChecked=0, Total=2070 [2022-01-09 23:15:21,499 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 42 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 231 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:21,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 180 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 66 Invalid, 0 Unknown, 231 Unchecked, 0.1s Time] [2022-01-09 23:15:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-09 23:15:21,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 101. [2022-01-09 23:15:21,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 89 states have (on average 1.1910112359550562) internal successors, (106), 89 states have internal predecessors, (106), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 23:15:21,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 120 transitions. [2022-01-09 23:15:21,512 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 120 transitions. Word has length 57 [2022-01-09 23:15:21,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:21,512 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 120 transitions. [2022-01-09 23:15:21,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-09 23:15:21,513 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 120 transitions. [2022-01-09 23:15:21,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-09 23:15:21,513 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:21,513 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:21,520 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-09 23:15:21,718 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,SelfDestructingSolverStorable12 [2022-01-09 23:15:21,718 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1720947117, now seen corresponding path program 6 times [2022-01-09 23:15:21,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:21,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827968130] [2022-01-09 23:15:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:21,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:21,726 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:21,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1364099046] [2022-01-09 23:15:21,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-09 23:15:21,726 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:21,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:21,731 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 23:15:21,732 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 23:15:21,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-01-09 23:15:21,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:15:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:15:21,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:21,930 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:15:21,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:22,041 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 4 proven. 27 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-01-09 23:15:22,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827968130] [2022-01-09 23:15:22,042 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:22,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364099046] [2022-01-09 23:15:22,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364099046] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:15:22,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:15:22,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-01-09 23:15:22,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076233903] [2022-01-09 23:15:22,042 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:22,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-09 23:15:22,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:22,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-09 23:15:22,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-01-09 23:15:22,043 INFO L87 Difference]: Start difference. First operand 101 states and 120 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:15:22,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:22,362 INFO L93 Difference]: Finished difference Result 172 states and 204 transitions. [2022-01-09 23:15:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-09 23:15:22,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2022-01-09 23:15:22,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:22,363 INFO L225 Difference]: With dead ends: 172 [2022-01-09 23:15:22,363 INFO L226 Difference]: Without dead ends: 141 [2022-01-09 23:15:22,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2022-01-09 23:15:22,364 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 84 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:22,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 96 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:15:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-01-09 23:15:22,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 115. [2022-01-09 23:15:22,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 103 states have (on average 1.1844660194174756) internal successors, (122), 103 states have internal predecessors, (122), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-09 23:15:22,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 136 transitions. [2022-01-09 23:15:22,378 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 136 transitions. Word has length 59 [2022-01-09 23:15:22,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:22,378 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 136 transitions. [2022-01-09 23:15:22,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 14 states have internal predecessors, (46), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-09 23:15:22,378 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 136 transitions. [2022-01-09 23:15:22,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-09 23:15:22,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:22,379 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:22,395 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 23:15:22,584 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,SelfDestructingSolverStorable13 [2022-01-09 23:15:22,584 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:22,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:22,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1029790343, now seen corresponding path program 7 times [2022-01-09 23:15:22,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:22,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34215831] [2022-01-09 23:15:22,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:22,585 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:22,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:22,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [650859496] [2022-01-09 23:15:22,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-09 23:15:22,600 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:22,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:22,601 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 23:15:22,602 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 23:15:22,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:15:22,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:15:22,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:22,810 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 58 proven. 17 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-01-09 23:15:22,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:22,926 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-01-09 23:15:22,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:22,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34215831] [2022-01-09 23:15:22,927 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:22,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650859496] [2022-01-09 23:15:22,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650859496] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:15:22,927 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:15:22,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-09 23:15:22,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204062763] [2022-01-09 23:15:22,927 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:22,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-09 23:15:22,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:22,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-09 23:15:22,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:15:22,928 INFO L87 Difference]: Start difference. First operand 115 states and 136 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:15:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:23,113 INFO L93 Difference]: Finished difference Result 208 states and 246 transitions. [2022-01-09 23:15:23,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-09 23:15:23,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2022-01-09 23:15:23,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:23,114 INFO L225 Difference]: With dead ends: 208 [2022-01-09 23:15:23,114 INFO L226 Difference]: Without dead ends: 181 [2022-01-09 23:15:23,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2022-01-09 23:15:23,117 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 103 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:23,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 114 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:15:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-01-09 23:15:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 152. [2022-01-09 23:15:23,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 137 states have (on average 1.1751824817518248) internal successors, (161), 137 states have internal predecessors, (161), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-09 23:15:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 179 transitions. [2022-01-09 23:15:23,136 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 179 transitions. Word has length 64 [2022-01-09 23:15:23,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:23,136 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 179 transitions. [2022-01-09 23:15:23,136 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:15:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 179 transitions. [2022-01-09 23:15:23,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-09 23:15:23,137 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:23,137 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:23,164 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-09 23:15:23,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:23,365 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:23,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:23,365 INFO L85 PathProgramCache]: Analyzing trace with hash -637552279, now seen corresponding path program 8 times [2022-01-09 23:15:23,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:23,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271664439] [2022-01-09 23:15:23,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:23,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:23,372 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:23,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78883962] [2022-01-09 23:15:23,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-09 23:15:23,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:23,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:23,373 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 23:15:23,374 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 23:15:23,447 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-09 23:15:23,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:15:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:15:23,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:23,580 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-01-09 23:15:23,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-01-09 23:15:23,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:23,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271664439] [2022-01-09 23:15:23,717 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:23,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78883962] [2022-01-09 23:15:23,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78883962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:15:23,717 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:15:23,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-01-09 23:15:23,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057363278] [2022-01-09 23:15:23,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:23,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-09 23:15:23,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:23,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-09 23:15:23,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2022-01-09 23:15:23,718 INFO L87 Difference]: Start difference. First operand 152 states and 179 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:15:24,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:24,035 INFO L93 Difference]: Finished difference Result 242 states and 284 transitions. [2022-01-09 23:15:24,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-09 23:15:24,035 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 64 [2022-01-09 23:15:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:24,036 INFO L225 Difference]: With dead ends: 242 [2022-01-09 23:15:24,036 INFO L226 Difference]: Without dead ends: 189 [2022-01-09 23:15:24,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2022-01-09 23:15:24,037 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 169 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:24,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 123 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-09 23:15:24,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-09 23:15:24,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 158. [2022-01-09 23:15:24,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 143 states have (on average 1.167832167832168) internal successors, (167), 143 states have internal predecessors, (167), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-09 23:15:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 185 transitions. [2022-01-09 23:15:24,057 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 185 transitions. Word has length 64 [2022-01-09 23:15:24,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:24,058 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 185 transitions. [2022-01-09 23:15:24,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:15:24,058 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 185 transitions. [2022-01-09 23:15:24,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-09 23:15:24,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:24,058 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:24,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-09 23:15:24,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-09 23:15:24,276 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:24,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:24,276 INFO L85 PathProgramCache]: Analyzing trace with hash -82294361, now seen corresponding path program 9 times [2022-01-09 23:15:24,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:24,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231830076] [2022-01-09 23:15:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:24,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:24,297 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:24,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379301425] [2022-01-09 23:15:24,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-09 23:15:24,297 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:24,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:24,320 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:15:24,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-09 23:15:24,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-01-09 23:15:24,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-09 23:15:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 8 conjunts are in the unsatisfiable core [2022-01-09 23:15:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:24,566 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 15 proven. 48 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2022-01-09 23:15:24,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-09 23:15:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 48 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-01-09 23:15:24,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-09 23:15:24,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231830076] [2022-01-09 23:15:24,692 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-01-09 23:15:24,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379301425] [2022-01-09 23:15:24,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379301425] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-09 23:15:24,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-01-09 23:15:24,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2022-01-09 23:15:24,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219082782] [2022-01-09 23:15:24,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-01-09 23:15:24,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-09 23:15:24,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-09 23:15:24,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-09 23:15:24,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2022-01-09 23:15:24,693 INFO L87 Difference]: Start difference. First operand 158 states and 185 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:15:24,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-09 23:15:24,947 INFO L93 Difference]: Finished difference Result 213 states and 244 transitions. [2022-01-09 23:15:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-09 23:15:24,947 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 66 [2022-01-09 23:15:24,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-09 23:15:24,948 INFO L225 Difference]: With dead ends: 213 [2022-01-09 23:15:24,948 INFO L226 Difference]: Without dead ends: 170 [2022-01-09 23:15:24,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2022-01-09 23:15:24,949 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 66 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-09 23:15:24,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 109 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-09 23:15:24,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-01-09 23:15:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 147. [2022-01-09 23:15:24,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 132 states have (on average 1.143939393939394) internal successors, (151), 132 states have internal predecessors, (151), 9 states have call successors, (9), 5 states have call predecessors, (9), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-09 23:15:24,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 169 transitions. [2022-01-09 23:15:24,964 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 169 transitions. Word has length 66 [2022-01-09 23:15:24,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-09 23:15:24,964 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 169 transitions. [2022-01-09 23:15:24,964 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 12 states have internal predecessors, (53), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-01-09 23:15:24,964 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 169 transitions. [2022-01-09 23:15:24,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-09 23:15:24,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-09 23:15:24,965 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-09 23:15:24,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-09 23:15:25,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-01-09 23:15:25,182 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-09 23:15:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-09 23:15:25,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1359141662, now seen corresponding path program 1 times [2022-01-09 23:15:25,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-09 23:15:25,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921914367] [2022-01-09 23:15:25,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:25,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-09 23:15:25,189 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-01-09 23:15:25,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1970958221] [2022-01-09 23:15:25,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-09 23:15:25,189 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-09 23:15:25,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-09 23:15:25,195 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-01-09 23:15:25,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-09 23:15:25,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-09 23:15:25,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 92 conjunts are in the unsatisfiable core [2022-01-09 23:15:25,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-09 23:15:25,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 16 [2022-01-09 23:15:25,460 INFO L353 Elim1Store]: treesize reduction 53, result has 19.7 percent of original size [2022-01-09 23:15:25,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2022-01-09 23:15:25,584 INFO L353 Elim1Store]: treesize reduction 144, result has 18.2 percent of original size [2022-01-09 23:15:25,584 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 54 [2022-01-09 23:15:25,660 INFO L353 Elim1Store]: treesize reduction 132, result has 17.5 percent of original size [2022-01-09 23:15:25,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2022-01-09 23:15:43,669 INFO L353 Elim1Store]: treesize reduction 238, result has 22.2 percent of original size [2022-01-09 23:15:43,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 100