/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 14:48:05,270 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 14:48:05,271 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 14:48:05,301 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 14:48:05,340 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 14:48:05,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 14:48:05,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 14:48:05,342 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 14:48:05,351 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 14:48:05,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 14:48:05,352 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 14:48:05,352 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 14:48:05,352 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 14:48:05,352 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 14:48:05,352 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 14:48:05,352 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 14:48:05,352 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 14:48:05,353 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 14:48:05,353 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 14:48:05,353 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 14:48:05,353 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 14:48:05,353 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 14:48:05,353 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 14:48:05,353 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 14:48:05,353 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 14:48:05,353 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 14:48:05,354 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:48:05,354 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 14:48:05,354 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 14:48:05,354 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 14:48:05,354 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 14:48:05,354 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 14:48:05,354 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 14:48:05,354 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 14:48:05,519 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 14:48:05,536 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 14:48:05,537 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 14:48:05,538 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 14:48:05,539 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 14:48:05,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2022-04-06 14:48:05,621 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675bfc122/17c4ca3c95fd4aaca3ef63f18196149f/FLAGa56d0d97b [2022-04-06 14:48:05,978 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 14:48:05,979 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c [2022-04-06 14:48:05,986 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675bfc122/17c4ca3c95fd4aaca3ef63f18196149f/FLAGa56d0d97b [2022-04-06 14:48:06,349 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/675bfc122/17c4ca3c95fd4aaca3ef63f18196149f [2022-04-06 14:48:06,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 14:48:06,352 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 14:48:06,352 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 14:48:06,352 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 14:48:06,356 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 14:48:06,357 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:48:06" (1/1) ... [2022-04-06 14:48:06,357 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e22b105 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06, skipping insertion in model container [2022-04-06 14:48:06,357 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 02:48:06" (1/1) ... [2022-04-06 14:48:06,362 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 14:48:06,377 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 14:48:06,539 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c[8507,8520] [2022-04-06 14:48:06,543 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:48:06,548 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 14:48:06,588 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+lh-reducer.c[8507,8520] [2022-04-06 14:48:06,590 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 14:48:06,598 INFO L208 MainTranslator]: Completed translation [2022-04-06 14:48:06,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06 WrapperNode [2022-04-06 14:48:06,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 14:48:06,599 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 14:48:06,600 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 14:48:06,600 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 14:48:06,608 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06" (1/1) ... [2022-04-06 14:48:06,608 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06" (1/1) ... [2022-04-06 14:48:06,627 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06" (1/1) ... [2022-04-06 14:48:06,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06" (1/1) ... [2022-04-06 14:48:06,644 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06" (1/1) ... [2022-04-06 14:48:06,646 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06" (1/1) ... [2022-04-06 14:48:06,655 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06" (1/1) ... [2022-04-06 14:48:06,658 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 14:48:06,659 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 14:48:06,659 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 14:48:06,659 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 14:48:06,660 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06" (1/1) ... [2022-04-06 14:48:06,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 14:48:06,672 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:06,684 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) [2022-04-06 14:48:06,691 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 [2022-04-06 14:48:06,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 14:48:06,718 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 14:48:06,719 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 14:48:06,719 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 14:48:06,719 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 14:48:06,719 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 14:48:06,719 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 14:48:06,719 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 14:48:06,720 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-04-06 14:48:06,720 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-04-06 14:48:06,720 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 14:48:06,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 14:48:06,722 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-04-06 14:48:06,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 14:48:06,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-04-06 14:48:06,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 14:48:06,722 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 14:48:06,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 14:48:06,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 14:48:06,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-04-06 14:48:06,723 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 14:48:06,802 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 14:48:06,803 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 14:48:07,214 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 14:48:07,220 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 14:48:07,220 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-04-06 14:48:07,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:48:07 BoogieIcfgContainer [2022-04-06 14:48:07,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 14:48:07,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 14:48:07,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 14:48:07,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 14:48:07,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 02:48:06" (1/3) ... [2022-04-06 14:48:07,226 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f5694f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:48:07, skipping insertion in model container [2022-04-06 14:48:07,226 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 02:48:06" (2/3) ... [2022-04-06 14:48:07,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35f5694f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 02:48:07, skipping insertion in model container [2022-04-06 14:48:07,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 02:48:07" (3/3) ... [2022-04-06 14:48:07,228 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+lh-reducer.c [2022-04-06 14:48:07,231 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 14:48:07,231 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 14:48:07,261 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 14:48:07,267 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2022-04-06 14:48:07,267 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 14:48:07,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-04-06 14:48:07,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-04-06 14:48:07,290 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:07,291 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:07,291 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:07,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:07,295 INFO L85 PathProgramCache]: Analyzing trace with hash -63360149, now seen corresponding path program 1 times [2022-04-06 14:48:07,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:07,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1829008895] [2022-04-06 14:48:07,307 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:07,308 INFO L85 PathProgramCache]: Analyzing trace with hash -63360149, now seen corresponding path program 2 times [2022-04-06 14:48:07,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:07,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633320836] [2022-04-06 14:48:07,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:07,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:07,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:07,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:07,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:07,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:07,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633320836] [2022-04-06 14:48:07,626 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633320836] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:07,626 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:07,626 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:48:07,628 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:07,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1829008895] [2022-04-06 14:48:07,629 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1829008895] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:07,629 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:07,630 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 14:48:07,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127557675] [2022-04-06 14:48:07,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:07,634 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 14:48:07,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:07,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 14:48:07,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 14:48:07,658 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:07,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:07,758 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-04-06 14:48:07,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 14:48:07,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-04-06 14:48:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:07,769 INFO L225 Difference]: With dead ends: 38 [2022-04-06 14:48:07,769 INFO L226 Difference]: Without dead ends: 21 [2022-04-06 14:48:07,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 14:48:07,774 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:07,775 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 43 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:48:07,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-04-06 14:48:07,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2022-04-06 14:48:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:07,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-04-06 14:48:07,798 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 12 [2022-04-06 14:48:07,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:07,798 INFO L478 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-04-06 14:48:07,798 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:07,799 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-04-06 14:48:07,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 14:48:07,799 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:07,799 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:07,799 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 14:48:07,800 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:07,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:07,800 INFO L85 PathProgramCache]: Analyzing trace with hash -2033873229, now seen corresponding path program 1 times [2022-04-06 14:48:07,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:07,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779494235] [2022-04-06 14:48:07,803 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:07,803 INFO L85 PathProgramCache]: Analyzing trace with hash -2033873229, now seen corresponding path program 2 times [2022-04-06 14:48:07,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:07,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449722730] [2022-04-06 14:48:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:07,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:07,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:07,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:07,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:07,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:07,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449722730] [2022-04-06 14:48:07,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449722730] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:07,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57760100] [2022-04-06 14:48:07,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:48:07,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:07,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:07,991 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) [2022-04-06 14:48:08,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 14:48:08,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:48:08,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:08,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 14:48:08,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:08,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:08,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:08,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57760100] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:08,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:08,353 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2022-04-06 14:48:08,354 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:08,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779494235] [2022-04-06 14:48:08,355 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779494235] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:08,357 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:08,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 14:48:08,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008726218] [2022-04-06 14:48:08,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:08,359 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 14:48:08,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:08,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 14:48:08,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 14:48:08,360 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:08,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:08,473 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2022-04-06 14:48:08,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 14:48:08,474 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-04-06 14:48:08,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:08,475 INFO L225 Difference]: With dead ends: 29 [2022-04-06 14:48:08,475 INFO L226 Difference]: Without dead ends: 26 [2022-04-06 14:48:08,476 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-04-06 14:48:08,476 INFO L913 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:08,476 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 36 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 14:48:08,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-04-06 14:48:08,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2022-04-06 14:48:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:08,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-04-06 14:48:08,481 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 17 [2022-04-06 14:48:08,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:08,481 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-04-06 14:48:08,482 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:08,482 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-04-06 14:48:08,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 14:48:08,482 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:08,482 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:08,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 14:48:08,695 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:08,696 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:08,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash 2006384747, now seen corresponding path program 3 times [2022-04-06 14:48:08,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:08,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2075276765] [2022-04-06 14:48:08,697 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:08,697 INFO L85 PathProgramCache]: Analyzing trace with hash 2006384747, now seen corresponding path program 4 times [2022-04-06 14:48:08,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:08,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100047324] [2022-04-06 14:48:08,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:08,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:08,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:08,837 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:08,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:08,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100047324] [2022-04-06 14:48:08,838 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100047324] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:08,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674758536] [2022-04-06 14:48:08,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:48:08,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:08,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:08,839 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) [2022-04-06 14:48:08,840 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 14:48:08,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:48:08,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:08,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 14:48:08,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:09,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:09,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:09,155 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:09,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674758536] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:09,156 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:09,156 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-04-06 14:48:09,156 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:09,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2075276765] [2022-04-06 14:48:09,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2075276765] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:09,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:09,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 14:48:09,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255606096] [2022-04-06 14:48:09,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:09,157 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 14:48:09,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:09,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 14:48:09,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-04-06 14:48:09,158 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:09,275 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-04-06 14:48:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 14:48:09,275 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-04-06 14:48:09,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:09,276 INFO L225 Difference]: With dead ends: 34 [2022-04-06 14:48:09,276 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 14:48:09,276 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-04-06 14:48:09,277 INFO L913 BasicCegarLoop]: 13 mSDtfsCounter, 16 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:09,277 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 49 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:48:09,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 14:48:09,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2022-04-06 14:48:09,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:09,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2022-04-06 14:48:09,282 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 22 [2022-04-06 14:48:09,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:09,282 INFO L478 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2022-04-06 14:48:09,283 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:09,283 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2022-04-06 14:48:09,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 14:48:09,283 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:09,283 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:09,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 14:48:09,499 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 14:48:09,500 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:09,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:09,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1862263219, now seen corresponding path program 5 times [2022-04-06 14:48:09,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:09,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1015026527] [2022-04-06 14:48:09,501 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:09,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1862263219, now seen corresponding path program 6 times [2022-04-06 14:48:09,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:09,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594509887] [2022-04-06 14:48:09,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:09,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:09,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:09,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:09,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:09,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:09,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594509887] [2022-04-06 14:48:09,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594509887] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:09,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748111211] [2022-04-06 14:48:09,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:48:09,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:09,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:09,616 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) [2022-04-06 14:48:09,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 14:48:09,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 14:48:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:09,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 623 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 14:48:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:09,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:09,992 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:09,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748111211] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:09,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:09,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-04-06 14:48:09,992 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:09,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1015026527] [2022-04-06 14:48:09,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1015026527] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:09,993 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:09,993 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 14:48:09,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261914556] [2022-04-06 14:48:09,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:09,993 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 14:48:09,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:09,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 14:48:09,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-04-06 14:48:09,994 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:10,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:10,168 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2022-04-06 14:48:10,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 14:48:10,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-04-06 14:48:10,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:10,169 INFO L225 Difference]: With dead ends: 39 [2022-04-06 14:48:10,169 INFO L226 Difference]: Without dead ends: 36 [2022-04-06 14:48:10,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2022-04-06 14:48:10,170 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:10,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:48:10,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-04-06 14:48:10,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2022-04-06 14:48:10,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:10,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-04-06 14:48:10,175 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 27 [2022-04-06 14:48:10,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:10,175 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-04-06 14:48:10,175 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:10,175 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-04-06 14:48:10,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 14:48:10,176 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:10,176 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:10,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 14:48:10,391 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:10,392 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:10,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:10,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1171819883, now seen corresponding path program 7 times [2022-04-06 14:48:10,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:10,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1576662002] [2022-04-06 14:48:10,393 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:10,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1171819883, now seen corresponding path program 8 times [2022-04-06 14:48:10,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:10,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466352546] [2022-04-06 14:48:10,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:10,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:10,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:10,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:10,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:10,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466352546] [2022-04-06 14:48:10,491 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466352546] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:10,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958899292] [2022-04-06 14:48:10,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:48:10,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:10,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:10,492 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) [2022-04-06 14:48:10,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 14:48:10,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:48:10,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:10,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 14:48:10,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:10,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:10,884 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958899292] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:10,884 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:10,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 16 [2022-04-06 14:48:10,885 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:10,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1576662002] [2022-04-06 14:48:10,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1576662002] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:10,885 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:10,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 14:48:10,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836569736] [2022-04-06 14:48:10,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:10,886 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 14:48:10,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:10,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 14:48:10,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-04-06 14:48:10,886 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:11,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:11,060 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-04-06 14:48:11,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 14:48:11,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-04-06 14:48:11,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:11,061 INFO L225 Difference]: With dead ends: 44 [2022-04-06 14:48:11,061 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 14:48:11,062 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2022-04-06 14:48:11,062 INFO L913 BasicCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:11,063 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:48:11,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 14:48:11,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2022-04-06 14:48:11,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:11,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2022-04-06 14:48:11,070 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 32 [2022-04-06 14:48:11,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:11,070 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2022-04-06 14:48:11,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2022-04-06 14:48:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-04-06 14:48:11,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:11,071 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:11,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 14:48:11,287 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:11,287 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:11,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:11,288 INFO L85 PathProgramCache]: Analyzing trace with hash -55675725, now seen corresponding path program 9 times [2022-04-06 14:48:11,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:11,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1526517597] [2022-04-06 14:48:11,288 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:11,288 INFO L85 PathProgramCache]: Analyzing trace with hash -55675725, now seen corresponding path program 10 times [2022-04-06 14:48:11,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:11,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083680948] [2022-04-06 14:48:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:11,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:11,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:11,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:11,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:11,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:11,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083680948] [2022-04-06 14:48:11,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083680948] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:11,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104531148] [2022-04-06 14:48:11,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:48:11,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:11,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:11,415 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) [2022-04-06 14:48:11,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 14:48:11,591 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:48:11,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:11,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 667 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 14:48:11,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:11,687 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:11,687 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:11,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104531148] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:11,857 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:11,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-04-06 14:48:11,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:11,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1526517597] [2022-04-06 14:48:11,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1526517597] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:11,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:11,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 14:48:11,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530937816] [2022-04-06 14:48:11,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:11,858 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 14:48:11,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:11,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 14:48:11,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-04-06 14:48:11,859 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:12,060 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2022-04-06 14:48:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 14:48:12,060 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-04-06 14:48:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:12,061 INFO L225 Difference]: With dead ends: 49 [2022-04-06 14:48:12,061 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 14:48:12,061 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=493, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:48:12,061 INFO L913 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:12,062 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 100 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 14:48:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 14:48:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-04-06 14:48:12,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-04-06 14:48:12,068 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 37 [2022-04-06 14:48:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:12,068 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-04-06 14:48:12,068 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:12,068 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-04-06 14:48:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-04-06 14:48:12,069 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:12,069 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:12,093 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 14:48:12,283 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:12,284 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:12,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:12,284 INFO L85 PathProgramCache]: Analyzing trace with hash -313664917, now seen corresponding path program 11 times [2022-04-06 14:48:12,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:12,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [60591049] [2022-04-06 14:48:12,285 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:12,285 INFO L85 PathProgramCache]: Analyzing trace with hash -313664917, now seen corresponding path program 12 times [2022-04-06 14:48:12,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:12,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504037543] [2022-04-06 14:48:12,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:12,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:12,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:12,406 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:12,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:12,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504037543] [2022-04-06 14:48:12,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504037543] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:12,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348571549] [2022-04-06 14:48:12,407 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:48:12,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:12,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:12,424 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) [2022-04-06 14:48:12,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 14:48:14,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:48:14,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:14,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 14:48:14,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:14,640 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:48:14,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 38 [2022-04-06 14:48:14,771 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 15 proven. 23 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 14:48:14,771 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-04-06 14:48:15,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348571549] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:15,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:15,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 26 [2022-04-06 14:48:15,694 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:15,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [60591049] [2022-04-06 14:48:15,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [60591049] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:15,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:15,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 14:48:15,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35486382] [2022-04-06 14:48:15,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:15,695 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 14:48:15,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:15,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 14:48:15,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-04-06 14:48:15,696 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:15,981 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-04-06 14:48:15,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 14:48:15,981 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-04-06 14:48:15,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:15,982 INFO L225 Difference]: With dead ends: 54 [2022-04-06 14:48:15,982 INFO L226 Difference]: Without dead ends: 51 [2022-04-06 14:48:15,982 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=206, Invalid=984, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 14:48:15,983 INFO L913 BasicCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:15,983 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 121 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:48:15,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-04-06 14:48:15,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2022-04-06 14:48:15,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:15,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2022-04-06 14:48:15,989 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 42 [2022-04-06 14:48:15,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:15,989 INFO L478 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2022-04-06 14:48:15,989 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:15,989 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2022-04-06 14:48:15,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-04-06 14:48:15,990 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:15,990 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:16,014 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 14:48:16,190 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:16,191 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:16,191 INFO L85 PathProgramCache]: Analyzing trace with hash 461457331, now seen corresponding path program 13 times [2022-04-06 14:48:16,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:16,191 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1123075600] [2022-04-06 14:48:16,192 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:16,192 INFO L85 PathProgramCache]: Analyzing trace with hash 461457331, now seen corresponding path program 14 times [2022-04-06 14:48:16,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:16,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309623368] [2022-04-06 14:48:16,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:16,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:16,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:16,334 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:16,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:16,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309623368] [2022-04-06 14:48:16,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309623368] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:16,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080659046] [2022-04-06 14:48:16,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 14:48:16,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:16,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:16,335 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) [2022-04-06 14:48:16,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 14:48:16,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 14:48:16,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:16,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 711 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 14:48:16,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:16,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:16,852 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:16,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080659046] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:16,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:16,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 22 [2022-04-06 14:48:16,853 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:16,853 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1123075600] [2022-04-06 14:48:16,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1123075600] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:16,853 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:16,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 14:48:16,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948393569] [2022-04-06 14:48:16,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:16,854 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 14:48:16,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:16,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 14:48:16,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2022-04-06 14:48:16,854 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:17,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:17,136 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2022-04-06 14:48:17,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 14:48:17,136 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-04-06 14:48:17,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:17,137 INFO L225 Difference]: With dead ends: 59 [2022-04-06 14:48:17,137 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 14:48:17,137 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=759, Unknown=0, NotChecked=0, Total=992 [2022-04-06 14:48:17,138 INFO L913 BasicCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:17,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 144 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:48:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 14:48:17,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 53. [2022-04-06 14:48:17,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:17,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-04-06 14:48:17,144 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 47 [2022-04-06 14:48:17,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:17,144 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-04-06 14:48:17,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:17,144 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-04-06 14:48:17,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-04-06 14:48:17,145 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:17,145 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:17,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 14:48:17,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:17,363 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:17,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:17,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1346824043, now seen corresponding path program 15 times [2022-04-06 14:48:17,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:17,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [528192089] [2022-04-06 14:48:17,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:17,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1346824043, now seen corresponding path program 16 times [2022-04-06 14:48:17,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:17,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557524985] [2022-04-06 14:48:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:17,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:17,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:17,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557524985] [2022-04-06 14:48:17,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557524985] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:17,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314853558] [2022-04-06 14:48:17,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 14:48:17,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:17,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:17,555 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) [2022-04-06 14:48:17,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 14:48:17,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 14:48:17,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:17,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:48:17,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:17,933 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:17,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 14:48:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:18,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314853558] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 14:48:18,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-04-06 14:48:18,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 24 [2022-04-06 14:48:18,167 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 14:48:18,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [528192089] [2022-04-06 14:48:18,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [528192089] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 14:48:18,168 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 14:48:18,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 14:48:18,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822604778] [2022-04-06 14:48:18,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 14:48:18,168 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 14:48:18,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:18,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 14:48:18,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2022-04-06 14:48:18,169 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:18,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 14:48:18,503 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-04-06 14:48:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 14:48:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2022-04-06 14:48:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 14:48:18,504 INFO L225 Difference]: With dead ends: 64 [2022-04-06 14:48:18,504 INFO L226 Difference]: Without dead ends: 61 [2022-04-06 14:48:18,505 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=277, Invalid=913, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 14:48:18,506 INFO L913 BasicCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 14:48:18,506 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 169 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 14:48:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-04-06 14:48:18,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 58. [2022-04-06 14:48:18,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:18,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2022-04-06 14:48:18,511 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 52 [2022-04-06 14:48:18,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 14:48:18,512 INFO L478 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2022-04-06 14:48:18,512 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-04-06 14:48:18,512 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2022-04-06 14:48:18,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-04-06 14:48:18,512 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 14:48:18,512 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 14:48:18,534 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 14:48:18,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-04-06 14:48:18,728 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 14:48:18,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 14:48:18,728 INFO L85 PathProgramCache]: Analyzing trace with hash -618112333, now seen corresponding path program 17 times [2022-04-06 14:48:18,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 14:48:18,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [222256626] [2022-04-06 14:48:18,729 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 14:48:18,729 INFO L85 PathProgramCache]: Analyzing trace with hash -618112333, now seen corresponding path program 18 times [2022-04-06 14:48:18,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 14:48:18,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914982153] [2022-04-06 14:48:18,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 14:48:18,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 14:48:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:18,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 14:48:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 14:48:18,900 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 14:48:18,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 14:48:18,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914982153] [2022-04-06 14:48:18,900 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914982153] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 14:48:18,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578761348] [2022-04-06 14:48:18,900 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 14:48:18,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 14:48:18,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 14:48:18,901 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) [2022-04-06 14:48:18,903 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 14:48:19,311 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 14:48:19,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 14:48:19,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 645 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 14:48:19,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 14:48:19,481 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-04-06 14:48:19,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23