/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:44:29,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:44:29,937 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:44:29,964 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:44:30,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:44:30,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:44:30,006 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:44:30,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:44:30,013 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:44:30,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:44:30,014 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:44:30,015 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:44:30,015 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:44:30,015 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:44:30,015 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:44:30,015 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:44:30,015 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:44:30,016 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:44:30,016 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:44:30,016 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:44:30,016 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:44:30,016 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:44:30,016 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:44:30,016 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:44:30,016 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:44:30,017 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:44:30,017 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:44:30,017 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:44:30,017 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:44:30,017 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:44:30,017 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:44:30,188 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:44:30,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:44:30,209 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:44:30,209 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:44:30,210 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:44:30,211 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2022-04-06 21:44:30,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afe45b9d/89d075fc61fb4b0eba3fe8bca36299bc/FLAG3c0062eae [2022-04-06 21:44:30,602 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:44:30,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2022-04-06 21:44:30,613 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afe45b9d/89d075fc61fb4b0eba3fe8bca36299bc/FLAG3c0062eae [2022-04-06 21:44:30,621 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6afe45b9d/89d075fc61fb4b0eba3fe8bca36299bc [2022-04-06 21:44:30,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:44:30,623 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:44:30,624 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:44:30,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:44:30,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:44:30,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:44:30" (1/1) ... [2022-04-06 21:44:30,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19d25b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30, skipping insertion in model container [2022-04-06 21:44:30,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:44:30" (1/1) ... [2022-04-06 21:44:30,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:44:30,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:44:30,745 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c[588,601] [2022-04-06 21:44:30,776 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:44:30,781 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:44:30,793 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c[588,601] [2022-04-06 21:44:30,809 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:44:30,817 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:44:30,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30 WrapperNode [2022-04-06 21:44:30,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:44:30,818 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:44:30,818 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:44:30,818 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:44:30,837 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30" (1/1) ... [2022-04-06 21:44:30,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30" (1/1) ... [2022-04-06 21:44:30,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30" (1/1) ... [2022-04-06 21:44:30,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30" (1/1) ... [2022-04-06 21:44:30,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30" (1/1) ... [2022-04-06 21:44:30,858 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30" (1/1) ... [2022-04-06 21:44:30,859 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30" (1/1) ... [2022-04-06 21:44:30,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:44:30,860 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:44:30,860 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:44:30,860 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:44:30,864 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30" (1/1) ... [2022-04-06 21:44:30,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:44:30,874 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:30,882 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 21:44:30,898 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 21:44:30,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:44:30,912 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:44:30,912 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:44:30,912 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 21:44:30,912 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:44:30,912 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:44:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 21:44:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:44:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:44:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:44:30,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-04-06 21:44:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 21:44:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:44:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:44:30,914 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:44:30,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:44:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:44:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:44:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:44:30,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:44:30,963 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:44:30,965 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:44:31,087 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:44:31,108 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:44:31,108 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 21:44:31,110 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:44:31 BoogieIcfgContainer [2022-04-06 21:44:31,110 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:44:31,111 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:44:31,111 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:44:31,129 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:44:31,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:44:30" (1/3) ... [2022-04-06 21:44:31,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764a80b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:44:31, skipping insertion in model container [2022-04-06 21:44:31,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:44:30" (2/3) ... [2022-04-06 21:44:31,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@764a80b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:44:31, skipping insertion in model container [2022-04-06 21:44:31,130 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:44:31" (3/3) ... [2022-04-06 21:44:31,131 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.c [2022-04-06 21:44:31,134 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:44:31,134 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:44:31,175 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:44:31,179 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 21:44:31,179 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:44:31,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:44:31,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 21:44:31,192 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:31,193 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:31,193 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:31,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:31,196 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 1 times [2022-04-06 21:44:31,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:31,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1727798582] [2022-04-06 21:44:31,207 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:44:31,208 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 2 times [2022-04-06 21:44:31,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:31,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736953610] [2022-04-06 21:44:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:31,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:44:31,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:44:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:44:31,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:44:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:44:31,368 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 21:44:31,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:31,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736953610] [2022-04-06 21:44:31,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736953610] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:31,369 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:31,369 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:44:31,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:31,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1727798582] [2022-04-06 21:44:31,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1727798582] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:31,371 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:31,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:44:31,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208314641] [2022-04-06 21:44:31,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:31,374 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:44:31,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:31,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:44:31,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:44:31,397 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 21:44:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:31,487 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2022-04-06 21:44:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:44:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 21:44:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:31,494 INFO L225 Difference]: With dead ends: 63 [2022-04-06 21:44:31,494 INFO L226 Difference]: Without dead ends: 31 [2022-04-06 21:44:31,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:44:31,500 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:31,501 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:44:31,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-04-06 21:44:31,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-04-06 21:44:31,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:44:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-04-06 21:44:31,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-04-06 21:44:31,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:31,538 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-04-06 21:44:31,538 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 21:44:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-04-06 21:44:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 21:44:31,538 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:31,539 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:31,539 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:44:31,539 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:31,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:31,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 1 times [2022-04-06 21:44:31,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:31,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1182360243] [2022-04-06 21:44:31,540 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:44:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 2 times [2022-04-06 21:44:31,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:31,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564680694] [2022-04-06 21:44:31,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:31,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:31,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:44:31,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:44:31,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:44:31,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:44:31,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:44:31,642 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 21:44:31,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:31,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564680694] [2022-04-06 21:44:31,643 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564680694] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:31,647 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:31,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:44:31,648 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:31,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1182360243] [2022-04-06 21:44:31,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1182360243] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:31,648 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:31,648 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:44:31,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627639827] [2022-04-06 21:44:31,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:31,649 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:44:31,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:31,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:44:31,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:44:31,650 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 21:44:31,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:31,788 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-04-06 21:44:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:44:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2022-04-06 21:44:31,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:31,789 INFO L225 Difference]: With dead ends: 37 [2022-04-06 21:44:31,789 INFO L226 Difference]: Without dead ends: 35 [2022-04-06 21:44:31,790 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:44:31,790 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:31,791 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:44:31,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-04-06 21:44:31,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-04-06 21:44:31,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-04-06 21:44:31,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-04-06 21:44:31,800 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-04-06 21:44:31,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:31,800 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-04-06 21:44:31,800 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-04-06 21:44:31,800 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-04-06 21:44:31,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:44:31,800 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:31,801 INFO L499 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:31,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 21:44:31,801 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:31,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:31,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 1 times [2022-04-06 21:44:31,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:31,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1216054223] [2022-04-06 21:44:31,802 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:44:31,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 2 times [2022-04-06 21:44:31,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:31,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251587986] [2022-04-06 21:44:31,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:31,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:31,811 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:31,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77620446] [2022-04-06 21:44:31,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:44:31,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:31,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:31,813 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 21:44:31,863 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 21:44:31,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:44:31,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:31,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:44:31,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-04-06 21:44:31,988 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:44:31,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:31,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251587986] [2022-04-06 21:44:31,989 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:31,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77620446] [2022-04-06 21:44:31,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77620446] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:31,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:31,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:44:31,990 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:31,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1216054223] [2022-04-06 21:44:31,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1216054223] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:31,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:31,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:44:31,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430178851] [2022-04-06 21:44:31,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:31,991 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:44:31,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:31,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:44:31,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:44:31,992 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:44:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:32,035 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-04-06 21:44:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:44:32,036 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 21:44:32,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:32,037 INFO L225 Difference]: With dead ends: 54 [2022-04-06 21:44:32,037 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 21:44:32,037 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:44:32,038 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:32,038 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 148 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:44:32,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 21:44:32,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-04-06 21:44:32,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 21:44:32,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-04-06 21:44:32,049 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-04-06 21:44:32,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:32,049 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-04-06 21:44:32,049 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:44:32,049 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-04-06 21:44:32,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 21:44:32,050 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:32,050 INFO L499 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:32,067 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 21:44:32,267 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:32,268 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:32,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:32,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 1 times [2022-04-06 21:44:32,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:32,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [366013676] [2022-04-06 21:44:32,269 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:44:32,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 2 times [2022-04-06 21:44:32,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:32,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804672687] [2022-04-06 21:44:32,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:32,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:32,286 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:32,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [323143314] [2022-04-06 21:44:32,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:44:32,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:32,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:32,287 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 21:44:32,288 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 21:44:32,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:44:32,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:32,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:44:32,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:32,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:44:32,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:44:32,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:32,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804672687] [2022-04-06 21:44:32,379 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:32,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323143314] [2022-04-06 21:44:32,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323143314] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:32,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:32,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:44:32,380 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:32,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [366013676] [2022-04-06 21:44:32,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [366013676] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:32,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:32,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:44:32,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622339728] [2022-04-06 21:44:32,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:32,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:44:32,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:32,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:44:32,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:44:32,382 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:44:32,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:32,436 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-04-06 21:44:32,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:44:32,443 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2022-04-06 21:44:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:32,447 INFO L225 Difference]: With dead ends: 58 [2022-04-06 21:44:32,447 INFO L226 Difference]: Without dead ends: 56 [2022-04-06 21:44:32,449 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:44:32,450 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:32,450 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 149 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:44:32,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-04-06 21:44:32,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-04-06 21:44:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:44:32,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-04-06 21:44:32,474 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-04-06 21:44:32,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:32,474 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-04-06 21:44:32,474 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:44:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-04-06 21:44:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-04-06 21:44:32,475 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:32,475 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:32,504 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 21:44:32,675 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,SelfDestructingSolverStorable3 [2022-04-06 21:44:32,676 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:32,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:32,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 1 times [2022-04-06 21:44:32,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:32,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [103417792] [2022-04-06 21:44:32,678 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:44:32,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 2 times [2022-04-06 21:44:32,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:32,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608390952] [2022-04-06 21:44:32,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:32,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:32,690 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:32,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155113156] [2022-04-06 21:44:32,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:44:32,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:32,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:32,696 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 21:44:32,697 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 21:44:32,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:44:32,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:32,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:44:32,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-04-06 21:44:32,849 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:44:32,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:32,849 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608390952] [2022-04-06 21:44:32,849 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:32,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155113156] [2022-04-06 21:44:32,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155113156] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:32,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:32,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:44:32,850 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:32,850 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [103417792] [2022-04-06 21:44:32,850 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [103417792] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:32,850 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:32,850 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:44:32,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330357461] [2022-04-06 21:44:32,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:32,851 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:44:32,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:32,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:44:32,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:44:32,851 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:44:32,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:32,918 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-04-06 21:44:32,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:44:32,919 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-04-06 21:44:32,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:32,920 INFO L225 Difference]: With dead ends: 66 [2022-04-06 21:44:32,920 INFO L226 Difference]: Without dead ends: 54 [2022-04-06 21:44:32,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:44:32,922 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:32,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 135 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:44:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-04-06 21:44:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-04-06 21:44:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 21:44:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-04-06 21:44:32,942 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-04-06 21:44:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:32,942 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-04-06 21:44:32,942 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:44:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-04-06 21:44:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 21:44:32,943 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:32,943 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:32,962 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 21:44:33,161 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:33,162 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:33,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:33,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 1 times [2022-04-06 21:44:33,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:33,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2138493059] [2022-04-06 21:44:33,181 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:33,181 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:33,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 2 times [2022-04-06 21:44:33,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:33,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052661378] [2022-04-06 21:44:33,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:33,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:33,202 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:33,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1793361318] [2022-04-06 21:44:33,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:44:33,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:33,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:33,204 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 21:44:33,204 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 21:44:33,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:44:33,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:33,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:44:33,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:33,408 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 21:44:33,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-04-06 21:44:33,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:33,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052661378] [2022-04-06 21:44:33,507 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:33,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793361318] [2022-04-06 21:44:33,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793361318] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:33,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:33,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 21:44:33,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:33,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2138493059] [2022-04-06 21:44:33,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2138493059] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:33,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:33,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:44:33,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325810446] [2022-04-06 21:44:33,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:33,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:44:33,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:33,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:44:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:44:33,509 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 21:44:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:33,615 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2022-04-06 21:44:33,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:44:33,616 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2022-04-06 21:44:33,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:33,617 INFO L225 Difference]: With dead ends: 81 [2022-04-06 21:44:33,617 INFO L226 Difference]: Without dead ends: 79 [2022-04-06 21:44:33,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:44:33,617 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 6 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:33,618 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 180 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:44:33,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-04-06 21:44:33,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2022-04-06 21:44:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 37 states have (on average 1.054054054054054) internal successors, (39), 39 states have internal predecessors, (39), 21 states have call successors, (21), 11 states have call predecessors, (21), 10 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 21:44:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2022-04-06 21:44:33,625 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 49 [2022-04-06 21:44:33,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:33,626 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2022-04-06 21:44:33,626 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-04-06 21:44:33,626 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2022-04-06 21:44:33,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 21:44:33,627 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:33,627 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:33,645 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 21:44:33,843 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:33,843 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:33,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:33,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 3 times [2022-04-06 21:44:33,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:33,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [69858412] [2022-04-06 21:44:33,848 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:33,848 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:33,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 4 times [2022-04-06 21:44:33,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:33,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910468556] [2022-04-06 21:44:33,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:33,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:33,855 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:33,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [530366946] [2022-04-06 21:44:33,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:44:33,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:33,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:33,871 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 21:44:33,872 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 21:44:33,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:44:33,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:33,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:44:33,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 21:44:34,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:34,156 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 21:44:34,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910468556] [2022-04-06 21:44:34,157 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530366946] [2022-04-06 21:44:34,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530366946] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:34,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:34,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 21:44:34,157 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:34,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [69858412] [2022-04-06 21:44:34,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [69858412] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:34,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:34,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:44:34,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515875688] [2022-04-06 21:44:34,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:34,158 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:44:34,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:34,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:44:34,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:44:34,158 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 21:44:34,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:34,236 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2022-04-06 21:44:34,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:44:34,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-04-06 21:44:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:34,238 INFO L225 Difference]: With dead ends: 85 [2022-04-06 21:44:34,238 INFO L226 Difference]: Without dead ends: 83 [2022-04-06 21:44:34,238 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:44:34,238 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:34,239 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 196 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:44:34,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-04-06 21:44:34,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 74. [2022-04-06 21:44:34,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 40 states have (on average 1.05) internal successors, (42), 42 states have internal predecessors, (42), 22 states have call successors, (22), 12 states have call predecessors, (22), 11 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-04-06 21:44:34,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2022-04-06 21:44:34,246 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 54 [2022-04-06 21:44:34,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:34,246 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2022-04-06 21:44:34,246 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 21:44:34,246 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2022-04-06 21:44:34,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-04-06 21:44:34,247 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:34,247 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:34,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-04-06 21:44:34,467 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:34,467 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:34,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1546120389, now seen corresponding path program 5 times [2022-04-06 21:44:34,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:34,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1523898204] [2022-04-06 21:44:34,472 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:34,472 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:34,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1546120389, now seen corresponding path program 6 times [2022-04-06 21:44:34,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:34,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183870993] [2022-04-06 21:44:34,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:34,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:34,478 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:34,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053846078] [2022-04-06 21:44:34,479 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:44:34,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:34,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:34,480 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 21:44:34,480 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 21:44:34,510 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-04-06 21:44:34,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:34,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:44:34,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 21:44:34,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 21:44:39,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:39,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183870993] [2022-04-06 21:44:39,255 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:39,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053846078] [2022-04-06 21:44:39,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053846078] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:39,255 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:39,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 21:44:39,255 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:39,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1523898204] [2022-04-06 21:44:39,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1523898204] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:39,256 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:39,256 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:44:39,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042199852] [2022-04-06 21:44:39,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:39,256 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:44:39,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:39,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:44:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:44:39,257 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 21:44:39,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:39,410 INFO L93 Difference]: Finished difference Result 89 states and 106 transitions. [2022-04-06 21:44:39,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:44:39,410 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 59 [2022-04-06 21:44:39,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:39,411 INFO L225 Difference]: With dead ends: 89 [2022-04-06 21:44:39,411 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 21:44:39,412 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:44:39,412 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:39,412 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 167 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:44:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 21:44:39,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 21:44:39,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 46 states have internal predecessors, (47), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:44:39,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 98 transitions. [2022-04-06 21:44:39,420 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 98 transitions. Word has length 59 [2022-04-06 21:44:39,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:39,420 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 98 transitions. [2022-04-06 21:44:39,420 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 21:44:39,420 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 98 transitions. [2022-04-06 21:44:39,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 21:44:39,421 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:39,421 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:39,442 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 21:44:39,638 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:39,638 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:39,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:39,638 INFO L85 PathProgramCache]: Analyzing trace with hash -310331719, now seen corresponding path program 1 times [2022-04-06 21:44:39,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:39,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [989325699] [2022-04-06 21:44:39,649 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:39,649 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash -310331719, now seen corresponding path program 2 times [2022-04-06 21:44:39,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:39,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976706214] [2022-04-06 21:44:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:39,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:39,667 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:39,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576484453] [2022-04-06 21:44:39,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:44:39,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:39,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:39,676 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 21:44:39,677 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 21:44:39,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:44:39,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:39,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 21:44:39,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:39,971 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-04-06 21:44:39,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:40,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:40,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976706214] [2022-04-06 21:44:40,130 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:40,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576484453] [2022-04-06 21:44:40,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576484453] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:44:40,130 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:44:40,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 21:44:40,131 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [989325699] [2022-04-06 21:44:40,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [989325699] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:40,131 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:40,131 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:44:40,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361290749] [2022-04-06 21:44:40,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:40,131 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:44:40,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:40,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:44:40,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:44:40,132 INFO L87 Difference]: Start difference. First operand 84 states and 98 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 21:44:40,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:40,232 INFO L93 Difference]: Finished difference Result 94 states and 106 transitions. [2022-04-06 21:44:40,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:44:40,232 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2022-04-06 21:44:40,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:40,233 INFO L225 Difference]: With dead ends: 94 [2022-04-06 21:44:40,233 INFO L226 Difference]: Without dead ends: 92 [2022-04-06 21:44:40,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:44:40,234 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:40,234 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 186 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:44:40,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-04-06 21:44:40,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-04-06 21:44:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.06) internal successors, (53), 52 states have internal predecessors, (53), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:44:40,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 104 transitions. [2022-04-06 21:44:40,243 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 104 transitions. Word has length 75 [2022-04-06 21:44:40,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:40,245 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 104 transitions. [2022-04-06 21:44:40,245 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 21:44:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 104 transitions. [2022-04-06 21:44:40,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-04-06 21:44:40,248 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:40,248 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:40,267 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 21:44:40,465 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:40,466 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:40,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:40,466 INFO L85 PathProgramCache]: Analyzing trace with hash -63758730, now seen corresponding path program 7 times [2022-04-06 21:44:40,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:40,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1472498406] [2022-04-06 21:44:40,470 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:40,471 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:40,471 INFO L85 PathProgramCache]: Analyzing trace with hash -63758730, now seen corresponding path program 8 times [2022-04-06 21:44:40,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:40,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372303788] [2022-04-06 21:44:40,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:40,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:40,477 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:40,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224160618] [2022-04-06 21:44:40,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:44:40,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:40,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:40,492 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 21:44:40,493 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 21:44:40,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:44:40,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:40,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 21:44:40,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:40,739 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 48 proven. 17 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 21:44:40,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:41,381 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 48 proven. 17 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 21:44:41,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:41,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372303788] [2022-04-06 21:44:41,382 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:41,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224160618] [2022-04-06 21:44:41,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224160618] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:41,382 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:41,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-04-06 21:44:41,382 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:41,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1472498406] [2022-04-06 21:44:41,382 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1472498406] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:41,382 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:41,382 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:44:41,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181930277] [2022-04-06 21:44:41,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:41,383 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:44:41,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:41,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:44:41,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:44:41,383 INFO L87 Difference]: Start difference. First operand 92 states and 104 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 21:44:41,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:41,814 INFO L93 Difference]: Finished difference Result 115 states and 136 transitions. [2022-04-06 21:44:41,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:44:41,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2022-04-06 21:44:41,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:41,816 INFO L225 Difference]: With dead ends: 115 [2022-04-06 21:44:41,816 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 21:44:41,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 137 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:44:41,816 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 15 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:41,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 135 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:44:41,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 21:44:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 103. [2022-04-06 21:44:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 60 states have internal predecessors, (60), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 21:44:41,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2022-04-06 21:44:41,827 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 76 [2022-04-06 21:44:41,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:41,827 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2022-04-06 21:44:41,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 21:44:41,827 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2022-04-06 21:44:41,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 21:44:41,828 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:41,828 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:41,851 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 21:44:42,055 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,SelfDestructingSolverStorable9 [2022-04-06 21:44:42,055 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:42,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:42,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1701746168, now seen corresponding path program 1 times [2022-04-06 21:44:42,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:42,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322051919] [2022-04-06 21:44:42,060 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:42,060 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:42,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1701746168, now seen corresponding path program 2 times [2022-04-06 21:44:42,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:42,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194808907] [2022-04-06 21:44:42,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:42,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:42,067 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:42,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28873420] [2022-04-06 21:44:42,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:44:42,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:42,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:42,068 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 21:44:42,069 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 21:44:42,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:44:42,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:42,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 15 conjunts are in the unsatisfiable core [2022-04-06 21:44:42,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:42,354 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 21:44:42,355 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:42,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194808907] [2022-04-06 21:44:42,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28873420] [2022-04-06 21:44:42,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28873420] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:44:42,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:44:42,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-04-06 21:44:42,514 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:42,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322051919] [2022-04-06 21:44:42,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322051919] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:42,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:42,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:44:42,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123231191] [2022-04-06 21:44:42,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:42,515 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:44:42,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:42,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:44:42,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:44:42,515 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 21:44:42,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:42,644 INFO L93 Difference]: Finished difference Result 109 states and 120 transitions. [2022-04-06 21:44:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:44:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2022-04-06 21:44:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:42,646 INFO L225 Difference]: With dead ends: 109 [2022-04-06 21:44:42,646 INFO L226 Difference]: Without dead ends: 96 [2022-04-06 21:44:42,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:44:42,647 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 6 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:42,647 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 216 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:44:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-04-06 21:44:42,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-04-06 21:44:42,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 54 states have (on average 1.037037037037037) internal successors, (56), 56 states have internal predecessors, (56), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 21:44:42,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 106 transitions. [2022-04-06 21:44:42,655 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 106 transitions. Word has length 80 [2022-04-06 21:44:42,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:42,655 INFO L478 AbstractCegarLoop]: Abstraction has 96 states and 106 transitions. [2022-04-06 21:44:42,655 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 21:44:42,655 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 106 transitions. [2022-04-06 21:44:42,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 21:44:42,669 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:42,669 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:42,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-04-06 21:44:42,902 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:42,902 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:42,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:42,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1156119141, now seen corresponding path program 9 times [2022-04-06 21:44:42,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:42,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [333746902] [2022-04-06 21:44:42,906 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:42,907 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:42,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1156119141, now seen corresponding path program 10 times [2022-04-06 21:44:42,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:42,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637112999] [2022-04-06 21:44:42,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:42,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:42,913 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:42,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876932212] [2022-04-06 21:44:42,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:44:42,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:42,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:42,914 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:42,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 21:44:42,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:44:42,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:42,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 21:44:42,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 21:44:43,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 21:44:43,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:43,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637112999] [2022-04-06 21:44:43,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:43,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876932212] [2022-04-06 21:44:43,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876932212] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:43,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:43,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 21:44:43,230 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:43,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [333746902] [2022-04-06 21:44:43,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [333746902] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:43,231 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:43,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:44:43,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597622616] [2022-04-06 21:44:43,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:43,231 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:44:43,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:43,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:44:43,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-04-06 21:44:43,232 INFO L87 Difference]: Start difference. First operand 96 states and 106 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 21:44:43,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:43,520 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-04-06 21:44:43,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:44:43,521 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 81 [2022-04-06 21:44:43,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:43,521 INFO L225 Difference]: With dead ends: 112 [2022-04-06 21:44:43,521 INFO L226 Difference]: Without dead ends: 110 [2022-04-06 21:44:43,522 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:44:43,522 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 6 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:43,522 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 222 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:44:43,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-04-06 21:44:43,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 101. [2022-04-06 21:44:43,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 59 states have internal predecessors, (59), 27 states have call successors, (27), 17 states have call predecessors, (27), 16 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 21:44:43,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2022-04-06 21:44:43,531 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 81 [2022-04-06 21:44:43,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:43,531 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2022-04-06 21:44:43,531 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 21:44:43,531 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2022-04-06 21:44:43,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 21:44:43,532 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:43,532 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:43,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 21:44:43,739 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-04-06 21:44:43,739 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:43,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:43,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1087104342, now seen corresponding path program 11 times [2022-04-06 21:44:43,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:43,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [234778727] [2022-04-06 21:44:43,743 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:43,743 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:43,743 INFO L85 PathProgramCache]: Analyzing trace with hash 1087104342, now seen corresponding path program 12 times [2022-04-06 21:44:43,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:43,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868189918] [2022-04-06 21:44:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:43,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:43,750 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:43,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617987843] [2022-04-06 21:44:43,750 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:44:43,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:43,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:43,751 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:43,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 21:44:43,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:44:43,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:43,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2022-04-06 21:44:43,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:44,118 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 52 proven. 27 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-04-06 21:44:44,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:44,568 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 63 proven. 10 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-04-06 21:44:44,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:44,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868189918] [2022-04-06 21:44:44,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:44,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617987843] [2022-04-06 21:44:44,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617987843] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:44,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:44,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-04-06 21:44:44,569 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:44,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [234778727] [2022-04-06 21:44:44,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [234778727] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:44,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:44,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:44:44,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865623351] [2022-04-06 21:44:44,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:44,570 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:44:44,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:44,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:44:44,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:44:44,570 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 21:44:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:44,852 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2022-04-06 21:44:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:44:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 86 [2022-04-06 21:44:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:44,854 INFO L225 Difference]: With dead ends: 116 [2022-04-06 21:44:44,854 INFO L226 Difference]: Without dead ends: 111 [2022-04-06 21:44:44,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 157 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:44:44,855 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 13 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:44,855 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 134 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:44:44,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-04-06 21:44:44,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-04-06 21:44:44,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:44:44,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2022-04-06 21:44:44,863 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 86 [2022-04-06 21:44:44,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:44,864 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2022-04-06 21:44:44,864 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 21:44:44,864 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2022-04-06 21:44:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 21:44:44,864 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:44,864 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:44,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 21:44:45,081 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-04-06 21:44:45,081 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:45,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:45,082 INFO L85 PathProgramCache]: Analyzing trace with hash 511374036, now seen corresponding path program 3 times [2022-04-06 21:44:45,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:45,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [116216080] [2022-04-06 21:44:45,086 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:45,086 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash 511374036, now seen corresponding path program 4 times [2022-04-06 21:44:45,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:45,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153374044] [2022-04-06 21:44:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:45,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:45,092 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:45,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622622618] [2022-04-06 21:44:45,092 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:44:45,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:45,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:45,112 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:45,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 21:44:45,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:44:45,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:45,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 21:44:45,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:45,521 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 21:44:45,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:45,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:45,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153374044] [2022-04-06 21:44:45,672 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:45,672 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622622618] [2022-04-06 21:44:45,672 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622622618] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:44:45,672 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:44:45,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 21:44:45,673 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:45,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [116216080] [2022-04-06 21:44:45,673 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [116216080] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:45,673 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:45,673 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:44:45,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336182341] [2022-04-06 21:44:45,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:45,673 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:44:45,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:45,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:44:45,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:44:45,674 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 21:44:45,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:45,824 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2022-04-06 21:44:45,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:44:45,825 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 102 [2022-04-06 21:44:45,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:45,825 INFO L225 Difference]: With dead ends: 117 [2022-04-06 21:44:45,825 INFO L226 Difference]: Without dead ends: 115 [2022-04-06 21:44:45,826 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:44:45,826 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 6 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:45,826 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 225 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:44:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-04-06 21:44:45,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-04-06 21:44:45,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:44:45,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2022-04-06 21:44:45,835 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 102 [2022-04-06 21:44:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:45,835 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2022-04-06 21:44:45,835 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 21:44:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2022-04-06 21:44:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 21:44:45,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:45,836 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:45,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-04-06 21:44:46,053 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-04-06 21:44:46,053 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:46,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:46,053 INFO L85 PathProgramCache]: Analyzing trace with hash -360684101, now seen corresponding path program 13 times [2022-04-06 21:44:46,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:46,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [71519179] [2022-04-06 21:44:46,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:46,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:46,057 INFO L85 PathProgramCache]: Analyzing trace with hash -360684101, now seen corresponding path program 14 times [2022-04-06 21:44:46,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:46,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282164901] [2022-04-06 21:44:46,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:46,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:46,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:46,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [227347765] [2022-04-06 21:44:46,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:44:46,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:46,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:46,066 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:46,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 21:44:46,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:44:46,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:46,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 21:44:46,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:46,390 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 21:44:46,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:46,581 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 32 proven. 30 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 21:44:46,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:46,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282164901] [2022-04-06 21:44:46,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:46,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227347765] [2022-04-06 21:44:46,581 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227347765] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:46,581 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:46,582 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 21:44:46,582 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:46,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [71519179] [2022-04-06 21:44:46,582 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [71519179] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:46,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:46,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:44:46,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434823206] [2022-04-06 21:44:46,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:46,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:44:46,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:46,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:44:46,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:44:46,584 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 21:44:46,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:46,818 INFO L93 Difference]: Finished difference Result 142 states and 163 transitions. [2022-04-06 21:44:46,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:44:46,819 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) Word has length 103 [2022-04-06 21:44:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:46,820 INFO L225 Difference]: With dead ends: 142 [2022-04-06 21:44:46,820 INFO L226 Difference]: Without dead ends: 140 [2022-04-06 21:44:46,820 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 194 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:44:46,820 INFO L913 BasicCegarLoop]: 74 mSDtfsCounter, 7 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 334 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:46,821 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 270 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 334 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:44:46,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-04-06 21:44:46,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 130. [2022-04-06 21:44:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 77 states have internal predecessors, (77), 34 states have call successors, (34), 22 states have call predecessors, (34), 21 states have return successors, (31), 30 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 21:44:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2022-04-06 21:44:46,833 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 103 [2022-04-06 21:44:46,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:46,833 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2022-04-06 21:44:46,833 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 5 states have call predecessors, (18), 5 states have call successors, (18) [2022-04-06 21:44:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2022-04-06 21:44:46,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-04-06 21:44:46,836 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:46,836 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:46,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-04-06 21:44:47,052 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-04-06 21:44:47,052 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:47,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:47,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1368175293, now seen corresponding path program 3 times [2022-04-06 21:44:47,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:47,053 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [644571947] [2022-04-06 21:44:47,057 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:47,057 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:47,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1368175293, now seen corresponding path program 4 times [2022-04-06 21:44:47,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:47,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323485365] [2022-04-06 21:44:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:47,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:47,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:47,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442870820] [2022-04-06 21:44:47,064 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:44:47,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:47,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:47,064 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:47,065 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 21:44:47,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:44:47,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:47,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 22 conjunts are in the unsatisfiable core [2022-04-06 21:44:47,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:47,452 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 34 proven. 21 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 21:44:47,452 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:47,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323485365] [2022-04-06 21:44:47,726 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:47,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442870820] [2022-04-06 21:44:47,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442870820] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:44:47,726 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:44:47,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-04-06 21:44:47,727 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:47,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [644571947] [2022-04-06 21:44:47,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [644571947] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:47,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:47,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:44:47,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615758236] [2022-04-06 21:44:47,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:47,727 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:44:47,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:47,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:44:47,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:44:47,728 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:44:47,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:47,873 INFO L93 Difference]: Finished difference Result 136 states and 147 transitions. [2022-04-06 21:44:47,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:44:47,874 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 107 [2022-04-06 21:44:47,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:47,874 INFO L225 Difference]: With dead ends: 136 [2022-04-06 21:44:47,874 INFO L226 Difference]: Without dead ends: 123 [2022-04-06 21:44:47,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:44:47,875 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:47,875 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 234 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:44:47,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-04-06 21:44:47,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-04-06 21:44:47,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 71 states have (on average 1.028169014084507) internal successors, (73), 73 states have internal predecessors, (73), 31 states have call successors, (31), 21 states have call predecessors, (31), 20 states have return successors, (29), 28 states have call predecessors, (29), 29 states have call successors, (29) [2022-04-06 21:44:47,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2022-04-06 21:44:47,905 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 107 [2022-04-06 21:44:47,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:47,906 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2022-04-06 21:44:47,906 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:44:47,906 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2022-04-06 21:44:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-04-06 21:44:47,906 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:47,907 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:47,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 21:44:48,107 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:48,107 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:48,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:48,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1388085622, now seen corresponding path program 15 times [2022-04-06 21:44:48,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:48,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [973831110] [2022-04-06 21:44:48,112 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:48,112 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:48,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1388085622, now seen corresponding path program 16 times [2022-04-06 21:44:48,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:48,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227835332] [2022-04-06 21:44:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:48,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:48,129 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:48,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1991298186] [2022-04-06 21:44:48,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:44:48,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:48,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:48,143 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:48,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 21:44:48,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:44:48,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:48,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 21:44:48,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:44:48,552 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 34 proven. 33 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 21:44:48,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:44:48,795 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 34 proven. 33 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-04-06 21:44:48,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:44:48,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227835332] [2022-04-06 21:44:48,795 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:44:48,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991298186] [2022-04-06 21:44:48,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991298186] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:44:48,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:44:48,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-04-06 21:44:48,795 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:44:48,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [973831110] [2022-04-06 21:44:48,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [973831110] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:44:48,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:44:48,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:44:48,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471963848] [2022-04-06 21:44:48,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:44:48,796 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:44:48,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:48,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:44:48,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:44:48,797 INFO L87 Difference]: Start difference. First operand 123 states and 133 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:44:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:44:49,163 INFO L93 Difference]: Finished difference Result 139 states and 157 transitions. [2022-04-06 21:44:49,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:44:49,168 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2022-04-06 21:44:49,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:44:49,169 INFO L225 Difference]: With dead ends: 139 [2022-04-06 21:44:49,169 INFO L226 Difference]: Without dead ends: 137 [2022-04-06 21:44:49,169 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:44:49,169 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 6 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:44:49,170 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 259 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:44:49,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-04-06 21:44:49,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 128. [2022-04-06 21:44:49,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 74 states have (on average 1.027027027027027) internal successors, (76), 76 states have internal predecessors, (76), 32 states have call successors, (32), 22 states have call predecessors, (32), 21 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:44:49,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2022-04-06 21:44:49,189 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 108 [2022-04-06 21:44:49,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:44:49,189 INFO L478 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2022-04-06 21:44:49,189 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:44:49,189 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2022-04-06 21:44:49,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 21:44:49,190 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:44:49,190 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:44:49,215 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:44:49,390 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:44:49,391 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:44:49,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:44:49,391 INFO L85 PathProgramCache]: Analyzing trace with hash 34642523, now seen corresponding path program 17 times [2022-04-06 21:44:49,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:44:49,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [133049415] [2022-04-06 21:44:49,397 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:44:49,398 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:44:49,398 INFO L85 PathProgramCache]: Analyzing trace with hash 34642523, now seen corresponding path program 18 times [2022-04-06 21:44:49,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:44:49,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433153191] [2022-04-06 21:44:49,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:44:49,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:44:49,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:44:49,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1082042750] [2022-04-06 21:44:49,418 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:44:49,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:44:49,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:44:49,421 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:44:49,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 21:44:49,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:44:49,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:44:49,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 24 conjunts are in the unsatisfiable core [2022-04-06 21:44:49,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:45:00,215 WARN L833 $PredicateComparison]: unable to prove that (or (and (exists ((aux_div_v_main_~z~0_BEFORE_CALL_228_35 Int)) (not (let ((.cse0 (* 3 aux_div_v_main_~z~0_BEFORE_CALL_228_35 aux_div_v_main_~z~0_BEFORE_CALL_228_35))) (= (+ (* 6 (* aux_div_v_main_~z~0_BEFORE_CALL_228_35 (+ (* (- 3) aux_div_v_main_~z~0_BEFORE_CALL_228_35) .cse0 1))) (* 12 aux_div_v_main_~z~0_BEFORE_CALL_228_35)) (+ (* 18 (let ((.cse1 (div (+ (* 6 aux_div_v_main_~z~0_BEFORE_CALL_228_35) (- 6)) 6))) (* .cse1 .cse1 .cse1))) (* (- 36) aux_div_v_main_~z~0_BEFORE_CALL_228_35) (* 12 .cse0) 18))))) (<= 0 |c___VERIFIER_assert_#in~cond|)) (<= 1 |c___VERIFIER_assert_#in~cond|)) is different from false [2022-04-06 21:45:07,143 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 179 proven. 9 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 21:45:07,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:45:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 684 backedges. 179 proven. 9 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-04-06 21:45:11,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:45:11,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433153191] [2022-04-06 21:45:11,025 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:45:11,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082042750] [2022-04-06 21:45:11,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082042750] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:45:11,025 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:45:11,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2022-04-06 21:45:11,025 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:45:11,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [133049415] [2022-04-06 21:45:11,025 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [133049415] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:45:11,025 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:45:11,025 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:45:11,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259070621] [2022-04-06 21:45:11,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:45:11,026 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:45:11,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:45:11,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:45:11,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=143, Unknown=2, NotChecked=24, Total=210 [2022-04-06 21:45:11,026 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 21:45:13,076 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:15,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:17,079 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:19,081 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:21,979 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:23,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:26,021 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:28,197 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:30,198 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:32,200 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:34,298 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.10s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:36,312 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:38,314 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:40,317 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:42,319 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:42,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:45:42,319 INFO L93 Difference]: Finished difference Result 136 states and 146 transitions. [2022-04-06 21:45:42,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:45:42,321 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) Word has length 113 [2022-04-06 21:45:42,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:45:42,322 INFO L225 Difference]: With dead ends: 136 [2022-04-06 21:45:42,322 INFO L226 Difference]: Without dead ends: 134 [2022-04-06 21:45:42,322 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 212 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=63, Invalid=211, Unknown=2, NotChecked=30, Total=306 [2022-04-06 21:45:42,323 INFO L913 BasicCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 41 mSolverCounterUnsat, 15 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 15 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 31.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:45:42,323 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 95 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 105 Invalid, 15 Unknown, 42 Unchecked, 31.2s Time] [2022-04-06 21:45:42,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-04-06 21:45:42,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-04-06 21:45:42,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 80 states have internal predecessors, (81), 32 states have call successors, (32), 24 states have call predecessors, (32), 22 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:45:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 143 transitions. [2022-04-06 21:45:42,337 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 143 transitions. Word has length 113 [2022-04-06 21:45:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:45:42,337 INFO L478 AbstractCegarLoop]: Abstraction has 134 states and 143 transitions. [2022-04-06 21:45:42,337 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 21:45:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 143 transitions. [2022-04-06 21:45:42,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-04-06 21:45:42,338 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:45:42,338 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:45:42,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:45:42,543 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 21:45:42,543 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:45:42,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:45:42,544 INFO L85 PathProgramCache]: Analyzing trace with hash -2063139367, now seen corresponding path program 5 times [2022-04-06 21:45:42,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:45:42,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [575540236] [2022-04-06 21:45:42,549 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:45:42,549 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:45:42,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2063139367, now seen corresponding path program 6 times [2022-04-06 21:45:42,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:45:42,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83010334] [2022-04-06 21:45:42,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:45:42,549 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:45:42,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:45:42,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299697508] [2022-04-06 21:45:42,572 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:45:42,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:45:42,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:45:42,573 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:45:42,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 21:45:42,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:45:42,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:45:42,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:45:42,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:45:43,437 INFO L134 CoverageAnalysis]: Checked inductivity of 924 backedges. 107 proven. 16 refuted. 0 times theorem prover too weak. 801 trivial. 0 not checked. [2022-04-06 21:45:43,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:45:45,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:45:45,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83010334] [2022-04-06 21:45:45,473 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:45:45,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299697508] [2022-04-06 21:45:45,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299697508] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:45:45,473 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:45:45,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 21:45:45,473 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:45:45,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [575540236] [2022-04-06 21:45:45,473 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [575540236] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:45:45,474 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:45:45,474 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:45:45,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011820368] [2022-04-06 21:45:45,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:45:45,474 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:45:45,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:45:45,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:45:45,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=127, Unknown=1, NotChecked=0, Total=156 [2022-04-06 21:45:45,474 INFO L87 Difference]: Start difference. First operand 134 states and 143 transitions. Second operand has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 21:45:47,222 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:45:47,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:45:47,762 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2022-04-06 21:45:47,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:45:47,762 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) Word has length 129 [2022-04-06 21:45:47,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:45:47,763 INFO L225 Difference]: With dead ends: 140 [2022-04-06 21:45:47,763 INFO L226 Difference]: Without dead ends: 138 [2022-04-06 21:45:47,764 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=50, Invalid=221, Unknown=1, NotChecked=0, Total=272 [2022-04-06 21:45:47,764 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 202 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 202 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:45:47,764 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 202 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-04-06 21:45:47,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-04-06 21:45:47,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-04-06 21:45:47,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.024390243902439) internal successors, (84), 83 states have internal predecessors, (84), 32 states have call successors, (32), 25 states have call predecessors, (32), 23 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:45:47,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2022-04-06 21:45:47,775 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 129 [2022-04-06 21:45:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:45:47,776 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2022-04-06 21:45:47,776 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 4 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 21:45:47,776 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2022-04-06 21:45:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-04-06 21:45:47,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:45:47,777 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:45:47,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 21:45:47,981 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:45:47,982 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:45:47,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:45:47,982 INFO L85 PathProgramCache]: Analyzing trace with hash -262683944, now seen corresponding path program 5 times [2022-04-06 21:45:47,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:45:47,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1551259281] [2022-04-06 21:45:47,985 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:45:47,985 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:45:47,985 INFO L85 PathProgramCache]: Analyzing trace with hash -262683944, now seen corresponding path program 6 times [2022-04-06 21:45:47,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:45:47,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105006761] [2022-04-06 21:45:47,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:45:47,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:45:47,997 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:45:47,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1017118956] [2022-04-06 21:45:47,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:45:47,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:45:47,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:45:47,998 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:45:48,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 21:45:49,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:45:49,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:45:49,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 21:45:49,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:45:57,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 181 proven. 69 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 21:45:57,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:46:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 148 proven. 39 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2022-04-06 21:46:02,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:46:02,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105006761] [2022-04-06 21:46:02,243 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:46:02,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017118956] [2022-04-06 21:46:02,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017118956] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:46:02,244 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:46:02,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 21:46:02,244 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:46:02,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1551259281] [2022-04-06 21:46:02,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1551259281] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:46:02,244 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:46:02,244 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:46:02,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078196175] [2022-04-06 21:46:02,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:46:02,244 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:46:02,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:46:02,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:46:02,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2022-04-06 21:46:02,245 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2022-04-06 21:46:06,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.78s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:46:08,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:46:08,136 INFO L93 Difference]: Finished difference Result 144 states and 151 transitions. [2022-04-06 21:46:08,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 21:46:08,137 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) Word has length 134 [2022-04-06 21:46:08,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:46:08,138 INFO L225 Difference]: With dead ends: 144 [2022-04-06 21:46:08,138 INFO L226 Difference]: Without dead ends: 142 [2022-04-06 21:46:08,138 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 249 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-04-06 21:46:08,138 INFO L913 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:46:08,138 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 109 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-04-06 21:46:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2022-04-06 21:46:08,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2022-04-06 21:46:08,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 85 states have internal predecessors, (85), 32 states have call successors, (32), 25 states have call predecessors, (32), 24 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 21:46:08,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 147 transitions. [2022-04-06 21:46:08,178 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 147 transitions. Word has length 134 [2022-04-06 21:46:08,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:46:08,179 INFO L478 AbstractCegarLoop]: Abstraction has 140 states and 147 transitions. [2022-04-06 21:46:08,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 6 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 5 states have call predecessors, (20), 6 states have call successors, (20) [2022-04-06 21:46:08,179 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 147 transitions. [2022-04-06 21:46:08,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 21:46:08,181 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:46:08,181 INFO L499 BasicCegarLoop]: trace histogram [23, 22, 22, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:46:08,193 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 21:46:08,393 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:46:08,393 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:46:08,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:46:08,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1923910469, now seen corresponding path program 19 times [2022-04-06 21:46:08,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:46:08,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [621284543] [2022-04-06 21:46:08,397 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:46:08,397 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:46:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1923910469, now seen corresponding path program 20 times [2022-04-06 21:46:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:46:08,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197131071] [2022-04-06 21:46:08,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:46:08,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:46:08,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:46:08,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976903280] [2022-04-06 21:46:08,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:46:08,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:46:08,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:46:08,406 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:46:08,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 21:46:08,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:46:08,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:46:08,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 21:46:08,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:46:08,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 44 proven. 58 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-06 21:46:08,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:46:09,123 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 44 proven. 58 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2022-04-06 21:46:09,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:46:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197131071] [2022-04-06 21:46:09,123 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:46:09,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976903280] [2022-04-06 21:46:09,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976903280] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:46:09,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:46:09,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-04-06 21:46:09,124 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:46:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [621284543] [2022-04-06 21:46:09,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [621284543] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:46:09,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:46:09,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:46:09,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169269582] [2022-04-06 21:46:09,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:46:09,124 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:46:09,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:46:09,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:46:09,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:46:09,125 INFO L87 Difference]: Start difference. First operand 140 states and 147 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-04-06 21:46:09,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:46:09,598 INFO L93 Difference]: Finished difference Result 180 states and 202 transitions. [2022-04-06 21:46:09,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:46:09,598 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 135 [2022-04-06 21:46:09,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:46:09,599 INFO L225 Difference]: With dead ends: 180 [2022-04-06 21:46:09,599 INFO L226 Difference]: Without dead ends: 172 [2022-04-06 21:46:09,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:46:09,600 INFO L913 BasicCegarLoop]: 78 mSDtfsCounter, 7 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:46:09,600 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 301 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 21:46:09,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-04-06 21:46:09,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 163. [2022-04-06 21:46:09,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 99 states have internal predecessors, (99), 37 states have call successors, (37), 29 states have call predecessors, (37), 28 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 21:46:09,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 171 transitions. [2022-04-06 21:46:09,618 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 171 transitions. Word has length 135 [2022-04-06 21:46:09,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:46:09,618 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 171 transitions. [2022-04-06 21:46:09,619 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 6 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2022-04-06 21:46:09,619 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 171 transitions. [2022-04-06 21:46:09,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-04-06 21:46:09,620 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:46:09,620 INFO L499 BasicCegarLoop]: trace histogram [28, 27, 27, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:46:09,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 21:46:09,837 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:46:09,837 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:46:09,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:46:09,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1219256746, now seen corresponding path program 21 times [2022-04-06 21:46:09,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:46:09,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1050929718] [2022-04-06 21:46:09,846 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:46:09,846 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:46:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1219256746, now seen corresponding path program 22 times [2022-04-06 21:46:09,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:46:09,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090002601] [2022-04-06 21:46:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:46:09,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:46:09,852 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:46:09,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [269672394] [2022-04-06 21:46:09,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:46:09,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:46:09,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:46:09,860 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:46:09,862 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 21:46:09,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:46:09,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:46:09,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 45 conjunts are in the unsatisfiable core [2022-04-06 21:46:09,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:46:10,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 54 proven. 90 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-04-06 21:46:10,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:46:10,579 INFO L134 CoverageAnalysis]: Checked inductivity of 1548 backedges. 54 proven. 90 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2022-04-06 21:46:10,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:46:10,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090002601] [2022-04-06 21:46:10,579 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:46:10,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269672394] [2022-04-06 21:46:10,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269672394] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:46:10,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:46:10,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 21:46:10,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:46:10,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1050929718] [2022-04-06 21:46:10,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1050929718] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:46:10,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:46:10,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:46:10,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489348933] [2022-04-06 21:46:10,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:46:10,580 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:46:10,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:46:10,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:46:10,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:46:10,581 INFO L87 Difference]: Start difference. First operand 163 states and 171 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2022-04-06 21:46:11,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:46:11,557 INFO L93 Difference]: Finished difference Result 195 states and 220 transitions. [2022-04-06 21:46:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:46:11,557 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) Word has length 162 [2022-04-06 21:46:11,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:46:11,558 INFO L225 Difference]: With dead ends: 195 [2022-04-06 21:46:11,558 INFO L226 Difference]: Without dead ends: 193 [2022-04-06 21:46:11,559 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 308 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:46:11,559 INFO L913 BasicCegarLoop]: 90 mSDtfsCounter, 7 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:46:11,559 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 360 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:46:11,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-04-06 21:46:11,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 178. [2022-04-06 21:46:11,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 107 states have internal predecessors, (108), 42 states have call successors, (42), 31 states have call predecessors, (42), 30 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 21:46:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 190 transitions. [2022-04-06 21:46:11,583 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 190 transitions. Word has length 162 [2022-04-06 21:46:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:46:11,583 INFO L478 AbstractCegarLoop]: Abstraction has 178 states and 190 transitions. [2022-04-06 21:46:11,583 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 7 states have call successors, (31), 2 states have call predecessors, (31), 1 states have return successors, (29), 7 states have call predecessors, (29), 7 states have call successors, (29) [2022-04-06 21:46:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 190 transitions. [2022-04-06 21:46:11,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-04-06 21:46:11,601 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:46:11,602 INFO L499 BasicCegarLoop]: trace histogram [29, 28, 28, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:46:11,619 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 21:46:11,815 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 21:46:11,815 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:46:11,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:46:11,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1267842796, now seen corresponding path program 1 times [2022-04-06 21:46:11,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:46:11,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1358797654] [2022-04-06 21:46:11,819 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:46:11,819 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:46:11,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1267842796, now seen corresponding path program 2 times [2022-04-06 21:46:11,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:46:11,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126252543] [2022-04-06 21:46:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:46:11,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:46:11,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:46:11,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1362218560] [2022-04-06 21:46:11,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:46:11,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:46:11,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:46:11,852 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:46:11,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 21:46:11,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:46:11,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:46:11,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 54 conjunts are in the unsatisfiable core [2022-04-06 21:46:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:46:12,489 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:46:12,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1638 backedges. 275 proven. 76 refuted. 0 times theorem prover too weak. 1287 trivial. 0 not checked. [2022-04-06 21:46:12,541 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:46:14,518 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:46:29,211 WARN L232 SmtUtils]: Spent 9.97s on a formula simplification that was a NOOP. DAG size: 60 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:46:33,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:46:33,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126252543] [2022-04-06 21:46:33,788 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:46:33,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362218560] [2022-04-06 21:46:33,788 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1362218560] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:46:33,788 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:46:33,788 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-04-06 21:46:33,788 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:46:33,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1358797654] [2022-04-06 21:46:33,789 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1358797654] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:46:33,789 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:46:33,789 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:46:33,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505968215] [2022-04-06 21:46:33,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:46:33,789 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:46:33,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:46:33,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:46:33,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:46:33,790 INFO L87 Difference]: Start difference. First operand 178 states and 190 transitions. Second operand has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 8 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2022-04-06 21:46:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:46:34,842 INFO L93 Difference]: Finished difference Result 198 states and 212 transitions. [2022-04-06 21:46:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:46:34,842 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 8 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) Word has length 166 [2022-04-06 21:46:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:46:34,843 INFO L225 Difference]: With dead ends: 198 [2022-04-06 21:46:34,843 INFO L226 Difference]: Without dead ends: 186 [2022-04-06 21:46:34,844 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:46:34,844 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 14 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:46:34,844 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 187 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:46:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-04-06 21:46:34,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2022-04-06 21:46:34,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 111 states have (on average 1.018018018018018) internal successors, (113), 113 states have internal predecessors, (113), 42 states have call successors, (42), 33 states have call predecessors, (42), 32 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 21:46:34,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 195 transitions. [2022-04-06 21:46:34,863 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 195 transitions. Word has length 166 [2022-04-06 21:46:34,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:46:34,863 INFO L478 AbstractCegarLoop]: Abstraction has 186 states and 195 transitions. [2022-04-06 21:46:34,863 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 8 states have call successors, (32), 2 states have call predecessors, (32), 2 states have return successors, (30), 8 states have call predecessors, (30), 7 states have call successors, (30) [2022-04-06 21:46:34,863 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 195 transitions. [2022-04-06 21:46:34,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-04-06 21:46:34,864 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:46:34,865 INFO L499 BasicCegarLoop]: trace histogram [33, 32, 32, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:46:34,897 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 21:46:35,082 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-04-06 21:46:35,082 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:46:35,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:46:35,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1777251365, now seen corresponding path program 23 times [2022-04-06 21:46:35,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:46:35,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240658151] [2022-04-06 21:46:35,086 INFO L97 AcceleratorQvasr]: Qvasr could not accelerate loop because java.lang.UnsupportedOperationException: Cannot deal with arrays. [2022-04-06 21:46:35,087 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 21:46:35,087 INFO L85 PathProgramCache]: Analyzing trace with hash -1777251365, now seen corresponding path program 24 times [2022-04-06 21:46:35,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:46:35,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577154794] [2022-04-06 21:46:35,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:46:35,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:46:35,096 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:46:35,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1054059657] [2022-04-06 21:46:35,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:46:35,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:46:35,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:46:35,097 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:46:35,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 21:46:35,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:46:35,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:46:35,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 31 conjunts are in the unsatisfiable core [2022-04-06 21:46:35,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:46:35,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 430 proven. 4 refuted. 0 times theorem prover too weak. 1743 trivial. 0 not checked. [2022-04-06 21:46:35,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:46:44,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2177 backedges. 353 proven. 6 refuted. 0 times theorem prover too weak. 1818 trivial. 0 not checked. [2022-04-06 21:46:44,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:46:44,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577154794] [2022-04-06 21:46:44,348 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:46:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054059657] [2022-04-06 21:46:44,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054059657] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:46:44,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:46:44,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2022-04-06 21:46:44,349 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:46:44,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240658151] [2022-04-06 21:46:44,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240658151] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:46:44,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:46:44,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:46:44,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129126130] [2022-04-06 21:46:44,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:46:44,349 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:46:44,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:46:44,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:46:44,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:46:44,350 INFO L87 Difference]: Start difference. First operand 186 states and 195 transitions. Second operand has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:46:46,526 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 21:46:46,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:46:46,818 INFO L93 Difference]: Finished difference Result 190 states and 198 transitions. [2022-04-06 21:46:46,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 21:46:46,818 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) Word has length 189 [2022-04-06 21:46:46,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:46:46,818 INFO L225 Difference]: With dead ends: 190 [2022-04-06 21:46:46,818 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 21:46:46,819 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 362 SyntacticMatches, 5 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:46:46,819 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 14 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:46:46,820 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 110 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 21:46:46,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 21:46:46,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 21:46:46,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 21:46:46,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 21:46:46,820 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 189 [2022-04-06 21:46:46,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:46:46,820 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 21:46:46,820 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 5 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:46:46,820 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 21:46:46,821 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 21:46:46,822 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 21:46:46,840 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 21:46:47,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:46:47,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 21:46:56,133 WARN L232 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 163 DAG size of output: 35 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter) [2022-04-06 21:47:12,617 INFO L882 garLoopResultBuilder]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2022-04-06 21:47:12,617 INFO L882 garLoopResultBuilder]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2022-04-06 21:47:12,617 INFO L882 garLoopResultBuilder]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2022-04-06 21:47:12,617 INFO L885 garLoopResultBuilder]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2022-04-06 21:47:12,617 INFO L878 garLoopResultBuilder]: At program point L12(line 12) the Hoare annotation is: (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|) [2022-04-06 21:47:12,617 INFO L878 garLoopResultBuilder]: At program point L12-2(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 21:47:12,617 INFO L878 garLoopResultBuilder]: At program point assume_abort_if_notEXIT(lines 11 13) the Hoare annotation is: (and (not (= |assume_abort_if_not_#in~cond| 0)) (= assume_abort_if_not_~cond |assume_abort_if_not_#in~cond|)) [2022-04-06 21:47:12,617 INFO L878 garLoopResultBuilder]: At program point L33-2(lines 33 46) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:47:12,617 INFO L878 garLoopResultBuilder]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse1 main_~a~0)) (<= main_~a~0 50) (= main_~x~0 (* .cse1 .cse1 .cse1)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse1 (+ main_~a~0 1)))))) [2022-04-06 21:47:12,617 INFO L885 garLoopResultBuilder]: At program point mainEXIT(lines 22 56) the Hoare annotation is: true [2022-04-06 21:47:12,618 INFO L878 garLoopResultBuilder]: At program point L52(line 52) the Hoare annotation is: (let ((.cse1 (= (+ (* main_~n~0 6) 6) main_~z~0)) (.cse2 (+ main_~z~0 main_~x~0))) (or (let ((.cse0 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse0 main_~a~0)) (<= main_~a~0 50) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse1 (<= 0 main_~a~0) (<= .cse0 (+ main_~a~0 1)) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))))) (and (= main_~x~0 0) (= main_~y~0 1) .cse1 (= main_~z~0 6)) (and .cse1 (= main_~x~0 1) (= (+ main_~y~0 6) .cse2) (= main_~y~0 (+ main_~x~0 6))) (and (= (+ main_~x~0 10) main_~z~0) .cse1 (= (+ 7 main_~y~0) .cse2) (= main_~x~0 8)))) [2022-04-06 21:47:12,618 INFO L878 garLoopResultBuilder]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0)) (.cse1 (+ main_~z~0 main_~x~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (and .cse0 (= main_~x~0 1) (= (+ main_~y~0 6) .cse1) (= main_~y~0 (+ main_~x~0 6))) (let ((.cse2 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse2 main_~a~0)) (<= main_~a~0 50) (= main_~x~0 (* .cse2 .cse2 .cse2)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse2 (+ main_~a~0 1)))) (and (= (+ main_~x~0 10) main_~z~0) .cse0 (= (+ 7 main_~y~0) .cse1) (= main_~x~0 8)))) [2022-04-06 21:47:12,618 INFO L878 garLoopResultBuilder]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse1 main_~a~0)) (<= main_~a~0 50) (= main_~x~0 (* .cse1 .cse1 .cse1)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse1 (+ main_~a~0 1)))))) [2022-04-06 21:47:12,618 INFO L885 garLoopResultBuilder]: At program point mainFINAL(lines 22 56) the Hoare annotation is: true [2022-04-06 21:47:12,618 INFO L878 garLoopResultBuilder]: At program point L38(lines 33 46) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:47:12,618 INFO L878 garLoopResultBuilder]: At program point L36(line 36) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:47:12,618 INFO L878 garLoopResultBuilder]: At program point L34(line 34) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:47:12,618 INFO L878 garLoopResultBuilder]: At program point L34-1(line 34) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:47:12,618 INFO L885 garLoopResultBuilder]: At program point mainENTRY(lines 22 56) the Hoare annotation is: true [2022-04-06 21:47:12,618 INFO L885 garLoopResultBuilder]: At program point L26(line 26) the Hoare annotation is: true [2022-04-06 21:47:12,618 INFO L878 garLoopResultBuilder]: At program point L26-1(line 26) the Hoare annotation is: (and (<= main_~a~0 50) (<= 0 main_~a~0)) [2022-04-06 21:47:12,618 INFO L885 garLoopResultBuilder]: At program point L53(line 53) the Hoare annotation is: true [2022-04-06 21:47:12,618 INFO L878 garLoopResultBuilder]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0)) (.cse1 (+ main_~z~0 main_~x~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (and .cse0 (= main_~x~0 1) (= (+ main_~y~0 6) .cse1) (= main_~y~0 (+ main_~x~0 6))) (let ((.cse2 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse2 main_~a~0)) (<= main_~a~0 50) (= main_~x~0 (* .cse2 .cse2 .cse2)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse2 (+ main_~a~0 1)))) (and (= (+ main_~x~0 10) main_~z~0) .cse0 (= (+ 7 main_~y~0) .cse1) (= main_~x~0 8)))) [2022-04-06 21:47:12,618 INFO L878 garLoopResultBuilder]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~n~0 6) 6) main_~z~0))) (or (and (= main_~x~0 0) (= main_~y~0 1) .cse0 (= main_~z~0 6)) (let ((.cse1 (div (+ main_~z~0 (- 6)) 6))) (and (not (<= .cse1 main_~a~0)) (<= main_~a~0 50) (= main_~x~0 (* .cse1 .cse1 .cse1)) (= (+ (* main_~z~0 main_~z~0) 12) (+ (* main_~y~0 12) (* main_~z~0 6))) .cse0 (<= 0 main_~a~0) (<= .cse1 (+ main_~a~0 1)))))) [2022-04-06 21:47:12,619 INFO L878 garLoopResultBuilder]: At program point L37(line 37) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:47:12,619 INFO L878 garLoopResultBuilder]: At program point L35(line 35) the Hoare annotation is: (and (<= main_~n~0 (+ main_~a~0 1)) (<= main_~a~0 50) (= (+ (* main_~n~0 6) 6) main_~z~0) (<= 0 main_~a~0) (= (+ (* main_~n~0 12) (* (* main_~n~0 main_~y~0) 6) 6) (+ (* main_~x~0 18) (* main_~y~0 6))) (= (* main_~y~0 12) (+ (* 36 (* main_~n~0 main_~n~0)) 12 (* main_~n~0 36)))) [2022-04-06 21:47:12,619 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:47:12,619 INFO L878 garLoopResultBuilder]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#NULL.base)| |#NULL.base|)) [2022-04-06 21:47:12,619 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:47:12,619 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2022-04-06 21:47:12,619 INFO L885 garLoopResultBuilder]: At program point L-1(line -1) the Hoare annotation is: true [2022-04-06 21:47:12,619 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2022-04-06 21:47:12,619 INFO L885 garLoopResultBuilder]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2022-04-06 21:47:12,619 INFO L878 garLoopResultBuilder]: At program point L16(lines 16 17) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 21:47:12,619 INFO L878 garLoopResultBuilder]: At program point L15(lines 15 18) the Hoare annotation is: (and (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2022-04-06 21:47:12,619 INFO L885 garLoopResultBuilder]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2022-04-06 21:47:12,619 INFO L878 garLoopResultBuilder]: At program point L15-2(lines 14 20) the Hoare annotation is: (and (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2022-04-06 21:47:12,619 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertEXIT(lines 14 20) the Hoare annotation is: (and (or (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0)))) [2022-04-06 21:47:12,619 INFO L878 garLoopResultBuilder]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2022-04-06 21:47:12,622 INFO L719 BasicCegarLoop]: Path program histogram: [24, 6, 6, 2, 2, 2, 2, 2, 2] [2022-04-06 21:47:12,623 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-04-06 21:47:12,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.04 09:47:12 BoogieIcfgContainer [2022-04-06 21:47:12,636 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-04-06 21:47:12,637 INFO L158 Benchmark]: Toolchain (without parser) took 162013.13ms. Allocated memory was 172.0MB in the beginning and 298.8MB in the end (delta: 126.9MB). Free memory was 153.7MB in the beginning and 207.5MB in the end (delta: -53.8MB). Peak memory consumption was 184.6MB. Max. memory is 8.0GB. [2022-04-06 21:47:12,637 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 172.0MB. Free memory is still 142.0MB. There was no memory consumed. Max. memory is 8.0GB. [2022-04-06 21:47:12,637 INFO L158 Benchmark]: CACSL2BoogieTranslator took 193.73ms. Allocated memory is still 172.0MB. Free memory was 153.5MB in the beginning and 150.8MB in the end (delta: 2.7MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. [2022-04-06 21:47:12,637 INFO L158 Benchmark]: Boogie Preprocessor took 41.45ms. Allocated memory is still 172.0MB. Free memory was 150.8MB in the beginning and 149.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-04-06 21:47:12,637 INFO L158 Benchmark]: RCFGBuilder took 249.54ms. Allocated memory is still 172.0MB. Free memory was 149.3MB in the beginning and 138.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-04-06 21:47:12,637 INFO L158 Benchmark]: TraceAbstraction took 161525.52ms. Allocated memory was 172.0MB in the beginning and 298.8MB in the end (delta: 126.9MB). Free memory was 138.0MB in the beginning and 207.5MB in the end (delta: -69.4MB). Peak memory consumption was 170.7MB. Max. memory is 8.0GB. [2022-04-06 21:47:12,638 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 172.0MB. Free memory is still 142.0MB. There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 193.73ms. Allocated memory is still 172.0MB. Free memory was 153.5MB in the beginning and 150.8MB in the end (delta: 2.7MB). Peak memory consumption was 8.7MB. Max. memory is 8.0GB. * Boogie Preprocessor took 41.45ms. Allocated memory is still 172.0MB. Free memory was 150.8MB in the beginning and 149.3MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 249.54ms. Allocated memory is still 172.0MB. Free memory was 149.3MB in the beginning and 138.5MB in the end (delta: 10.8MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 161525.52ms. Allocated memory was 172.0MB in the beginning and 298.8MB in the end (delta: 126.9MB). Free memory was 138.0MB in the beginning and 207.5MB in the end (delta: -69.4MB). Peak memory consumption was 170.7MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 39 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 161.4s, OverallIterations: 24, TraceHistogramMax: 33, PathProgramHistogramMax: 24, EmptinessCheckTime: 0.1s, AutomataDifference: 47.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 25.6s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 15 mSolverCounterUnknown, 373 SdHoareTripleChecker+Valid, 45.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 234 mSDsluCounter, 4201 SdHoareTripleChecker+Invalid, 45.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 42 IncrementalHoareTripleChecker+Unchecked, 3019 mSDsCounter, 412 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 5472 IncrementalHoareTripleChecker+Invalid, 5941 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 412 mSolverCounterUnsat, 1182 mSDtfsCounter, 5472 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3693 GetRequests, 3410 SyntacticMatches, 28 SemanticMatches, 255 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 30.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=186occurred in iteration=23, InterpolantAutomatonStates: 184, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 24 MinimizatonAttempts, 97 StatesRemovedByMinimization, 11 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 36 LocationsWithAnnotation, 510 PreInvPairs, 776 NumberOfFragments, 1078 HoareAnnotationTreeSize, 510 FomulaSimplifications, 7049 FormulaSimplificationTreeSizeReduction, 3.1s HoareSimplificationTime, 36 FomulaSimplificationsInter, 304669 FormulaSimplificationTreeSizeReductionInter, 22.4s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((((n <= a + 1 && a <= 50) && n * 6 + 6 == z) && 0 <= a) && n * 12 + n * y * 6 + 6 == x * 18 + y * 6) && y * 12 == 36 * (n * n) + 12 + n * 36 - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not: !(\old(cond) == 0) && cond == \old(cond) - ProcedureContractResult [Line: 22]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: (\old(cond) == cond || !(1 <= \old(cond))) && (\old(cond) == 0 || !(cond == 0)) RESULT: Ultimate proved your program to be correct! [2022-04-06 21:47:12,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...