/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 17:31:32,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 17:31:32,149 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 17:31:32,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 17:31:32,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 17:31:32,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 17:31:32,216 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 17:31:32,216 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-04-06 17:31:32,228 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 17:31:32,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 17:31:32,229 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 17:31:32,229 INFO L138 SettingsManager]: * sizeof long=4 [2022-04-06 17:31:32,229 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 17:31:32,229 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-04-06 17:31:32,229 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 17:31:32,229 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 17:31:32,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 17:31:32,230 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 17:31:32,230 INFO L138 SettingsManager]: * sizeof long double=12 [2022-04-06 17:31:32,230 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 17:31:32,230 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 17:31:32,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 17:31:32,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 17:31:32,230 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 17:31:32,230 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 17:31:32,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 17:31:32,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 17:31:32,231 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 17:31:32,231 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 17:31:32,231 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 17:31:32,231 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 17:31:32,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 17:31:32,231 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-04-06 17:31:32,231 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 17:31:32,378 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 17:31:32,406 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 17:31:32,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 17:31:32,408 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 17:31:32,408 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 17:31:32,409 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2022-04-06 17:31:32,466 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad360a107/0f5acc16937649b292d0f61b147a09e8/FLAG38233b320 [2022-04-06 17:31:32,805 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 17:31:32,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard2_valuebound50.c [2022-04-06 17:31:32,812 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad360a107/0f5acc16937649b292d0f61b147a09e8/FLAG38233b320 [2022-04-06 17:31:32,820 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad360a107/0f5acc16937649b292d0f61b147a09e8 [2022-04-06 17:31:32,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 17:31:32,822 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 17:31:32,824 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 17:31:32,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 17:31:32,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 17:31:32,827 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:31:32" (1/1) ... [2022-04-06 17:31:32,828 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11705c7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32, skipping insertion in model container [2022-04-06 17:31:32,828 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 05:31:32" (1/1) ... [2022-04-06 17:31:32,832 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 17:31:32,842 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 17:31:32,951 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/hard2_valuebound50.c[526,539] [2022-04-06 17:31:32,960 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 17:31:32,964 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 17:31:32,971 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/hard2_valuebound50.c[526,539] [2022-04-06 17:31:32,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 17:31:32,982 INFO L208 MainTranslator]: Completed translation [2022-04-06 17:31:32,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32 WrapperNode [2022-04-06 17:31:32,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 17:31:32,983 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 17:31:32,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 17:31:32,984 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 17:31:33,004 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32" (1/1) ... [2022-04-06 17:31:33,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32" (1/1) ... [2022-04-06 17:31:33,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32" (1/1) ... [2022-04-06 17:31:33,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32" (1/1) ... [2022-04-06 17:31:33,011 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32" (1/1) ... [2022-04-06 17:31:33,013 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32" (1/1) ... [2022-04-06 17:31:33,014 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32" (1/1) ... [2022-04-06 17:31:33,015 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 17:31:33,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 17:31:33,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 17:31:33,015 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 17:31:33,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32" (1/1) ... [2022-04-06 17:31:33,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 17:31:33,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:31:33,042 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 17:31:33,063 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 17:31:33,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 17:31:33,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 17:31:33,069 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 17:31:33,069 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 17:31:33,069 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 17:31:33,069 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 17:31:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 17:31:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 17:31:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 17:31:33,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 17:31:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 17:31:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 17:31:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 17:31:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 17:31:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 17:31:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 17:31:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 17:31:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 17:31:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 17:31:33,070 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 17:31:33,108 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 17:31:33,109 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 17:31:33,210 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 17:31:33,214 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 17:31:33,214 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-04-06 17:31:33,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:31:33 BoogieIcfgContainer [2022-04-06 17:31:33,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 17:31:33,217 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 17:31:33,217 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 17:31:33,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 17:31:33,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 05:31:32" (1/3) ... [2022-04-06 17:31:33,219 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffb2cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:31:33, skipping insertion in model container [2022-04-06 17:31:33,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 05:31:32" (2/3) ... [2022-04-06 17:31:33,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ffb2cf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 05:31:33, skipping insertion in model container [2022-04-06 17:31:33,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 05:31:33" (3/3) ... [2022-04-06 17:31:33,221 INFO L111 eAbstractionObserver]: Analyzing ICFG hard2_valuebound50.c [2022-04-06 17:31:33,224 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 17:31:33,224 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 17:31:33,251 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 17:31:33,255 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 17:31:33,255 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 17:31:33,264 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-04-06 17:31:33,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 17:31:33,269 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:33,269 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 17:31:33,269 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:33,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:33,272 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 1 times [2022-04-06 17:31:33,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:33,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1155827668] [2022-04-06 17:31:33,284 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:31:33,284 INFO L85 PathProgramCache]: Analyzing trace with hash -977830905, now seen corresponding path program 2 times [2022-04-06 17:31:33,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:33,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191109756] [2022-04-06 17:31:33,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:33,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:33,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:31:33,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:31:33,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:31:33,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:31:33,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:31:33,452 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 17:31:33,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:33,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191109756] [2022-04-06 17:31:33,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191109756] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:33,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:33,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 17:31:33,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:33,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1155827668] [2022-04-06 17:31:33,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1155827668] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:33,455 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:33,455 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 17:31:33,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822098248] [2022-04-06 17:31:33,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:33,459 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 17:31:33,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:33,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 17:31:33,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 17:31:33,485 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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 17:31:33,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:33,578 INFO L93 Difference]: Finished difference Result 61 states and 95 transitions. [2022-04-06 17:31:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 17:31:33,580 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 17:31:33,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:33,585 INFO L225 Difference]: With dead ends: 61 [2022-04-06 17:31:33,585 INFO L226 Difference]: Without dead ends: 30 [2022-04-06 17:31:33,587 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 17:31:33,589 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:33,590 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 38 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:31:33,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-04-06 17:31:33,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-04-06 17:31:33,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 17:31:33,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-04-06 17:31:33,637 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 17 [2022-04-06 17:31:33,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:33,638 INFO L478 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-04-06 17:31:33,638 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 17:31:33,638 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-04-06 17:31:33,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-04-06 17:31:33,638 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:33,639 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 17:31:33,639 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 17:31:33,639 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:33,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:33,640 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 1 times [2022-04-06 17:31:33,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:33,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1546847217] [2022-04-06 17:31:33,643 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:31:33,643 INFO L85 PathProgramCache]: Analyzing trace with hash -297772535, now seen corresponding path program 2 times [2022-04-06 17:31:33,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:33,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887588163] [2022-04-06 17:31:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:33,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:31:33,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:31:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:31:33,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:31:33,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:31:33,749 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 17:31:33,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:33,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887588163] [2022-04-06 17:31:33,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887588163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:33,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:33,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:31:33,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:33,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1546847217] [2022-04-06 17:31:33,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1546847217] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:33,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:33,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:31:33,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887354843] [2022-04-06 17:31:33,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:33,752 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:31:33,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:33,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:31:33,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:31:33,753 INFO L87 Difference]: Start difference. First operand 30 states and 38 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 17:31:33,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:33,921 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-04-06 17:31:33,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 17:31:33,922 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 17:31:33,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:33,923 INFO L225 Difference]: With dead ends: 43 [2022-04-06 17:31:33,923 INFO L226 Difference]: Without dead ends: 41 [2022-04-06 17:31:33,923 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:31:33,924 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:33,924 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 45 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:31:33,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-04-06 17:31:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2022-04-06 17:31:33,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 17:31:33,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-04-06 17:31:33,932 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 17 [2022-04-06 17:31:33,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:33,932 INFO L478 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-04-06 17:31:33,932 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 17:31:33,932 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-04-06 17:31:33,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 17:31:33,932 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:33,933 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 17:31:33,933 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-04-06 17:31:33,933 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:33,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:33,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 1 times [2022-04-06 17:31:33,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:33,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1682612488] [2022-04-06 17:31:33,934 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:31:33,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1294462534, now seen corresponding path program 2 times [2022-04-06 17:31:33,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:33,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678694944] [2022-04-06 17:31:33,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:33,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:31:33,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 17:31:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:31:33,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 17:31:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:31:33,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-04-06 17:31:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 17:31:34,001 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 17:31:34,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:34,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678694944] [2022-04-06 17:31:34,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678694944] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:34,002 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:34,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:31:34,002 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:34,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1682612488] [2022-04-06 17:31:34,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1682612488] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:34,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:34,003 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:31:34,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490508788] [2022-04-06 17:31:34,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:34,003 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:31:34,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:34,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:31:34,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:31:34,004 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 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 17:31:34,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:34,118 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-04-06 17:31:34,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 17:31:34,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 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 17:31:34,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:34,140 INFO L225 Difference]: With dead ends: 47 [2022-04-06 17:31:34,140 INFO L226 Difference]: Without dead ends: 45 [2022-04-06 17:31:34,141 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:31:34,143 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 32 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:34,145 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 45 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:31:34,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-04-06 17:31:34,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2022-04-06 17:31:34,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-04-06 17:31:34,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2022-04-06 17:31:34,151 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 22 [2022-04-06 17:31:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:34,151 INFO L478 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2022-04-06 17:31:34,152 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 3 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 17:31:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2022-04-06 17:31:34,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-04-06 17:31:34,152 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:34,152 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 17:31:34,152 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-04-06 17:31:34,153 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:34,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:34,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 1 times [2022-04-06 17:31:34,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:34,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [907158888] [2022-04-06 17:31:34,153 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:31:34,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1449027479, now seen corresponding path program 2 times [2022-04-06 17:31:34,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:34,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52024757] [2022-04-06 17:31:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:34,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:34,162 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:31:34,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1241549349] [2022-04-06 17:31:34,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:31:34,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:34,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:31:34,168 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 17:31:34,173 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 17:31:34,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:31:34,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:31:34,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 17:31:34,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:31:34,384 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 17:31:34,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:31:34,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:34,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52024757] [2022-04-06 17:31:34,385 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:31:34,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1241549349] [2022-04-06 17:31:34,385 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1241549349] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:34,385 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:34,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:31:34,386 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [907158888] [2022-04-06 17:31:34,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [907158888] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:34,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:34,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:31:34,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629191005] [2022-04-06 17:31:34,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:34,387 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:31:34,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:34,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:31:34,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 17:31:34,387 INFO L87 Difference]: Start difference. First operand 38 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, (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 17:31:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:34,432 INFO L93 Difference]: Finished difference Result 66 states and 84 transitions. [2022-04-06 17:31:34,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:31:34,433 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 17:31:34,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:34,433 INFO L225 Difference]: With dead ends: 66 [2022-04-06 17:31:34,434 INFO L226 Difference]: Without dead ends: 52 [2022-04-06 17:31:34,434 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 17:31:34,435 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 8 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:34,435 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 128 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:31:34,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-04-06 17:31:34,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-04-06 17:31:34,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 16 states have call successors, (16), 7 states have call predecessors, (16), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 17:31:34,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-04-06 17:31:34,443 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 27 [2022-04-06 17:31:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:34,443 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-04-06 17:31:34,443 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 17:31:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-04-06 17:31:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-04-06 17:31:34,444 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:34,444 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, 1, 1] [2022-04-06 17:31:34,463 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 17:31:34,660 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:34,661 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:34,661 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 1 times [2022-04-06 17:31:34,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:34,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1981158009] [2022-04-06 17:31:34,662 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 17:31:34,662 INFO L85 PathProgramCache]: Analyzing trace with hash 905213191, now seen corresponding path program 2 times [2022-04-06 17:31:34,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:34,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908004677] [2022-04-06 17:31:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:34,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:34,669 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:31:34,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [942483608] [2022-04-06 17:31:34,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:31:34,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:34,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:31:34,683 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 17:31:34,684 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 17:31:34,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:31:34,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:31:34,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 17:31:34,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:31:34,820 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 17:31:34,821 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:31:34,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908004677] [2022-04-06 17:31:34,821 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:31:34,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942483608] [2022-04-06 17:31:34,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942483608] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:34,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:34,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:31:34,822 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:34,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1981158009] [2022-04-06 17:31:34,822 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1981158009] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:34,822 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:34,822 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:31:34,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087511487] [2022-04-06 17:31:34,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:34,822 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:31:34,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:34,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:31:34,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 17:31:34,823 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 17:31:34,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:34,870 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2022-04-06 17:31:34,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:31:34,871 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 34 [2022-04-06 17:31:34,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:34,872 INFO L225 Difference]: With dead ends: 65 [2022-04-06 17:31:34,872 INFO L226 Difference]: Without dead ends: 58 [2022-04-06 17:31:34,872 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 30 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 17:31:34,872 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 9 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:34,873 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 103 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:31:34,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-04-06 17:31:34,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-04-06 17:31:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 35 states have internal predecessors, (39), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-04-06 17:31:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 69 transitions. [2022-04-06 17:31:34,881 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 69 transitions. Word has length 34 [2022-04-06 17:31:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:34,881 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 69 transitions. [2022-04-06 17:31:34,882 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 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 17:31:34,882 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 69 transitions. [2022-04-06 17:31:34,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-04-06 17:31:34,882 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:34,882 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:31:34,901 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 17:31:35,099 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:35,099 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:35,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:35,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 1 times [2022-04-06 17:31:35,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:35,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [430731210] [2022-04-06 17:31:35,118 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:31:35,118 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:31:35,118 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:31:35,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1576096488, now seen corresponding path program 2 times [2022-04-06 17:31:35,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:35,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825778445] [2022-04-06 17:31:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:35,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:35,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:31:35,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846880897] [2022-04-06 17:31:35,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:31:35,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:35,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:31:35,145 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 17:31:35,146 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 17:31:35,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:31:35,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:31:35,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 17:31:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:31:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 17:31:35,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:31:35,396 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-04-06 17:31:35,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:35,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825778445] [2022-04-06 17:31:35,397 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:31:35,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846880897] [2022-04-06 17:31:35,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846880897] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 17:31:35,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 17:31:35,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-04-06 17:31:35,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:35,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [430731210] [2022-04-06 17:31:35,397 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [430731210] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:35,397 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:35,397 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 17:31:35,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839582399] [2022-04-06 17:31:35,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:35,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 17:31:35,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:35,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 17:31:35,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-04-06 17:31:35,398 INFO L87 Difference]: Start difference. First operand 57 states and 69 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17:31:35,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:35,511 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2022-04-06 17:31:35,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 17:31:35,511 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 44 [2022-04-06 17:31:35,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:35,513 INFO L225 Difference]: With dead ends: 69 [2022-04-06 17:31:35,513 INFO L226 Difference]: Without dead ends: 67 [2022-04-06 17:31:35,513 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 17:31:35,514 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:35,514 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 112 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:31:35,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-04-06 17:31:35,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 64. [2022-04-06 17:31:35,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 18 states have call successors, (18), 9 states have call predecessors, (18), 8 states have return successors, (16), 14 states have call predecessors, (16), 16 states have call successors, (16) [2022-04-06 17:31:35,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2022-04-06 17:31:35,528 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 44 [2022-04-06 17:31:35,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:35,528 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2022-04-06 17:31:35,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 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 17:31:35,528 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2022-04-06 17:31:35,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-04-06 17:31:35,534 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:35,535 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 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 17:31:35,553 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 17:31:35,751 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:35,751 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:35,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 1 times [2022-04-06 17:31:35,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:35,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1410601917] [2022-04-06 17:31:35,755 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:31:35,755 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:31:35,755 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:31:35,755 INFO L85 PathProgramCache]: Analyzing trace with hash 1615471943, now seen corresponding path program 2 times [2022-04-06 17:31:35,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:35,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117178860] [2022-04-06 17:31:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:35,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:35,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:31:35,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [327561297] [2022-04-06 17:31:35,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:31:35,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:35,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:31:35,762 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 17:31:35,763 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 17:31:35,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:31:35,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:31:35,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 25 conjunts are in the unsatisfiable core [2022-04-06 17:31:35,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:31:36,096 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 17:31:36,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:31:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-04-06 17:31:36,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:36,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117178860] [2022-04-06 17:31:36,790 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:31:36,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327561297] [2022-04-06 17:31:36,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327561297] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:31:36,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:31:36,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2022-04-06 17:31:36,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:36,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1410601917] [2022-04-06 17:31:36,791 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1410601917] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:36,791 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:36,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 17:31:36,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946290927] [2022-04-06 17:31:36,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:36,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 17:31:36,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:36,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 17:31:36,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:31:36,792 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 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 17:31:36,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:36,920 INFO L93 Difference]: Finished difference Result 130 states and 164 transitions. [2022-04-06 17:31:36,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 17:31:36,920 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 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 64 [2022-04-06 17:31:36,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:36,923 INFO L225 Difference]: With dead ends: 130 [2022-04-06 17:31:36,923 INFO L226 Difference]: Without dead ends: 101 [2022-04-06 17:31:36,925 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 116 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-04-06 17:31:36,926 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 11 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:36,926 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 172 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:31:36,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-04-06 17:31:36,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 99. [2022-04-06 17:31:36,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 60 states have (on average 1.15) internal successors, (69), 63 states have internal predecessors, (69), 25 states have call successors, (25), 14 states have call predecessors, (25), 13 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 17:31:36,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 117 transitions. [2022-04-06 17:31:36,950 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 117 transitions. Word has length 64 [2022-04-06 17:31:36,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:36,951 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 117 transitions. [2022-04-06 17:31:36,951 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 4 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 17:31:36,951 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 117 transitions. [2022-04-06 17:31:36,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 17:31:36,953 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:36,953 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 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 17:31:36,971 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 17:31:37,163 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:37,163 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:37,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:37,164 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 3 times [2022-04-06 17:31:37,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:37,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [429148290] [2022-04-06 17:31:37,167 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:31:37,167 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:31:37,167 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:31:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash -262609796, now seen corresponding path program 4 times [2022-04-06 17:31:37,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:37,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386845148] [2022-04-06 17:31:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:37,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:37,173 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:31:37,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2041108907] [2022-04-06 17:31:37,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 17:31:37,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:37,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:31:37,174 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 17:31:37,175 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 17:31:37,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 17:31:37,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:31:37,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 17 conjunts are in the unsatisfiable core [2022-04-06 17:31:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:31:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 17:31:37,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:31:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-04-06 17:31:37,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:37,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386845148] [2022-04-06 17:31:37,915 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:31:37,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041108907] [2022-04-06 17:31:37,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041108907] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:31:37,915 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:31:37,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 17:31:37,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:37,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [429148290] [2022-04-06 17:31:37,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [429148290] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:37,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:37,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:31:37,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583344470] [2022-04-06 17:31:37,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:37,916 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:31:37,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:37,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:31:37,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 17:31:37,917 INFO L87 Difference]: Start difference. First operand 99 states and 117 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 17:31:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:37,996 INFO L93 Difference]: Finished difference Result 126 states and 151 transitions. [2022-04-06 17:31:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 17:31:37,996 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 69 [2022-04-06 17:31:37,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:37,997 INFO L225 Difference]: With dead ends: 126 [2022-04-06 17:31:37,997 INFO L226 Difference]: Without dead ends: 103 [2022-04-06 17:31:37,997 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 2 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 17:31:37,998 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:37,998 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 175 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:31:37,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-04-06 17:31:38,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-04-06 17:31:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 62 states have (on average 1.1129032258064515) internal successors, (69), 66 states have internal predecessors, (69), 26 states have call successors, (26), 15 states have call predecessors, (26), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 17:31:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 118 transitions. [2022-04-06 17:31:38,006 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 118 transitions. Word has length 69 [2022-04-06 17:31:38,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:38,006 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 118 transitions. [2022-04-06 17:31:38,006 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2022-04-06 17:31:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 118 transitions. [2022-04-06 17:31:38,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 17:31:38,007 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:38,007 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:31:38,023 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 17:31:38,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:38,223 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:38,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:38,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 1 times [2022-04-06 17:31:38,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:38,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1983149688] [2022-04-06 17:31:38,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:31:38,227 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:31:38,227 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:31:38,227 INFO L85 PathProgramCache]: Analyzing trace with hash -1554666020, now seen corresponding path program 2 times [2022-04-06 17:31:38,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:38,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685425983] [2022-04-06 17:31:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:38,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:38,233 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:31:38,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [564273641] [2022-04-06 17:31:38,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:31:38,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:38,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:31:38,234 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 17:31:38,235 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 17:31:38,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:31:38,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:31:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 17:31:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:31:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 62 proven. 30 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2022-04-06 17:31:38,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:31:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 68 proven. 2 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-04-06 17:31:38,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:31:38,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685425983] [2022-04-06 17:31:38,808 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:31:38,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564273641] [2022-04-06 17:31:38,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564273641] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:31:38,809 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:31:38,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 17:31:38,809 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:31:38,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1983149688] [2022-04-06 17:31:38,809 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1983149688] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:31:38,809 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:31:38,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 17:31:38,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566949276] [2022-04-06 17:31:38,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:31:38,809 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 17:31:38,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:38,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 17:31:38,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-04-06 17:31:38,810 INFO L87 Difference]: Start difference. First operand 103 states and 118 transitions. Second operand has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 17:31:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:31:38,969 INFO L93 Difference]: Finished difference Result 109 states and 123 transitions. [2022-04-06 17:31:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 17:31:38,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 75 [2022-04-06 17:31:38,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:31:38,971 INFO L225 Difference]: With dead ends: 109 [2022-04-06 17:31:38,971 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 17:31:38,971 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-04-06 17:31:38,971 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 16 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 276 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:31:38,972 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 144 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 276 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:31:38,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 17:31:38,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-04-06 17:31:38,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 48 states have (on average 1.125) internal successors, (54), 51 states have internal predecessors, (54), 21 states have call successors, (21), 12 states have call predecessors, (21), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-04-06 17:31:38,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 94 transitions. [2022-04-06 17:31:38,979 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 94 transitions. Word has length 75 [2022-04-06 17:31:38,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:31:38,979 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 94 transitions. [2022-04-06 17:31:38,979 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2022-04-06 17:31:38,979 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 94 transitions. [2022-04-06 17:31:38,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-04-06 17:31:38,980 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:31:38,980 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:31:38,997 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 17:31:39,196 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:39,197 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:31:39,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:31:39,197 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 5 times [2022-04-06 17:31:39,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:31:39,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [409335375] [2022-04-06 17:31:39,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:31:39,200 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:31:39,200 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:31:39,200 INFO L85 PathProgramCache]: Analyzing trace with hash 330473976, now seen corresponding path program 6 times [2022-04-06 17:31:39,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:31:39,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200142057] [2022-04-06 17:31:39,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:31:39,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:31:39,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:31:39,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [874952183] [2022-04-06 17:31:39,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 17:31:39,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:31:39,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:31:39,208 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 17:31:39,209 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 17:31:39,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-04-06 17:31:39,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:31:39,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 17:31:39,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:31:39,516 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 17:31:39,527 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 17:31:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 17:31:39,599 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:32:08,009 WARN L232 SmtUtils]: Spent 7.01s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 17:33:00,253 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-04-06 17:33:00,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:33:00,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200142057] [2022-04-06 17:33:00,253 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:33:00,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874952183] [2022-04-06 17:33:00,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874952183] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:33:00,254 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:33:00,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 16 [2022-04-06 17:33:00,254 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:33:00,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [409335375] [2022-04-06 17:33:00,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [409335375] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:33:00,254 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:33:00,254 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 17:33:00,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141260544] [2022-04-06 17:33:00,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:33:00,255 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 17:33:00,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:00,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 17:33:00,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2022-04-06 17:33:00,255 INFO L87 Difference]: Start difference. First operand 81 states and 94 transitions. Second operand has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 17:33:00,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:33:00,412 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2022-04-06 17:33:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 17:33:00,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 81 [2022-04-06 17:33:00,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:33:00,413 INFO L225 Difference]: With dead ends: 106 [2022-04-06 17:33:00,413 INFO L226 Difference]: Without dead ends: 94 [2022-04-06 17:33:00,414 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=70, Invalid=235, Unknown=1, NotChecked=0, Total=306 [2022-04-06 17:33:00,414 INFO L913 BasicCegarLoop]: 30 mSDtfsCounter, 27 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:33:00,414 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 105 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:33:00,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-04-06 17:33:00,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2022-04-06 17:33:00,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 17:33:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 107 transitions. [2022-04-06 17:33:00,422 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 107 transitions. Word has length 81 [2022-04-06 17:33:00,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:33:00,422 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 107 transitions. [2022-04-06 17:33:00,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.272727272727273) internal successors, (25), 10 states have internal predecessors, (25), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-04-06 17:33:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 107 transitions. [2022-04-06 17:33:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-04-06 17:33:00,423 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:33:00,423 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:33:00,447 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 17:33:00,641 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:00,642 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:33:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:33:00,642 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 7 times [2022-04-06 17:33:00,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:00,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1888641590] [2022-04-06 17:33:00,645 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:33:00,645 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:33:00,645 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:33:00,645 INFO L85 PathProgramCache]: Analyzing trace with hash -454578581, now seen corresponding path program 8 times [2022-04-06 17:33:00,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:33:00,645 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436720207] [2022-04-06 17:33:00,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:33:00,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:33:00,651 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:33:00,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146477104] [2022-04-06 17:33:00,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:33:00,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:00,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:33:00,668 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 17:33:00,669 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 17:33:00,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:33:00,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:33:00,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 17:33:00,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:33:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2022-04-06 17:33:00,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:33:01,661 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 24 proven. 13 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2022-04-06 17:33:01,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:33:01,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436720207] [2022-04-06 17:33:01,661 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:33:01,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146477104] [2022-04-06 17:33:01,661 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146477104] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:33:01,661 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:33:01,661 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2022-04-06 17:33:01,662 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:33:01,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1888641590] [2022-04-06 17:33:01,662 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1888641590] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:33:01,662 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:33:01,662 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 17:33:01,662 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865222865] [2022-04-06 17:33:01,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:33:01,662 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 17:33:01,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:01,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 17:33:01,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-04-06 17:33:01,663 INFO L87 Difference]: Start difference. First operand 91 states and 107 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 17:33:01,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:33:01,815 INFO L93 Difference]: Finished difference Result 170 states and 221 transitions. [2022-04-06 17:33:01,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-04-06 17:33:01,815 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 86 [2022-04-06 17:33:01,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:33:01,816 INFO L225 Difference]: With dead ends: 170 [2022-04-06 17:33:01,816 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 17:33:01,816 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 161 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-04-06 17:33:01,817 INFO L913 BasicCegarLoop]: 57 mSDtfsCounter, 10 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:33:01,817 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 233 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:33:01,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 17:33:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2022-04-06 17:33:01,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 78 states have (on average 1.141025641025641) internal successors, (89), 82 states have internal predecessors, (89), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 17:33:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 158 transitions. [2022-04-06 17:33:01,829 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 158 transitions. Word has length 86 [2022-04-06 17:33:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:33:01,829 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 158 transitions. [2022-04-06 17:33:01,829 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 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 17:33:01,829 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 158 transitions. [2022-04-06 17:33:01,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-04-06 17:33:01,830 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:33:01,830 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 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, 1] [2022-04-06 17:33:01,846 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 17:33:02,030 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,SelfDestructingSolverStorable10 [2022-04-06 17:33:02,031 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:33:02,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:33:02,031 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 9 times [2022-04-06 17:33:02,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:02,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [178963504] [2022-04-06 17:33:02,042 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:33:02,042 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:33:02,042 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:33:02,042 INFO L85 PathProgramCache]: Analyzing trace with hash -132947769, now seen corresponding path program 10 times [2022-04-06 17:33:02,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:33:02,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063307679] [2022-04-06 17:33:02,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:33:02,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:33:02,048 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:33:02,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514600461] [2022-04-06 17:33:02,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 17:33:02,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:02,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:33:02,049 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 17:33:02,050 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 17:33:02,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 17:33:02,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:33:02,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 37 conjunts are in the unsatisfiable core [2022-04-06 17:33:02,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:33:02,470 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 17:33:02,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:33:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2022-04-06 17:33:22,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:33:22,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063307679] [2022-04-06 17:33:22,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:33:22,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514600461] [2022-04-06 17:33:22,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514600461] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:33:22,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:33:22,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 17:33:22,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:33:22,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [178963504] [2022-04-06 17:33:22,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [178963504] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:33:22,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:33:22,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 17:33:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309877539] [2022-04-06 17:33:22,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:33:22,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 17:33:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:22,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 17:33:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-04-06 17:33:22,016 INFO L87 Difference]: Start difference. First operand 130 states and 158 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 17:33:22,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:33:22,278 INFO L93 Difference]: Finished difference Result 164 states and 189 transitions. [2022-04-06 17:33:22,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 17:33:22,278 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 94 [2022-04-06 17:33:22,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:33:22,279 INFO L225 Difference]: With dead ends: 164 [2022-04-06 17:33:22,279 INFO L226 Difference]: Without dead ends: 157 [2022-04-06 17:33:22,279 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 170 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-04-06 17:33:22,280 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 17:33:22,280 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 266 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 457 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 17:33:22,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-04-06 17:33:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 154. [2022-04-06 17:33:22,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 96 states have (on average 1.1041666666666667) internal successors, (106), 100 states have internal predecessors, (106), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 17:33:22,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 175 transitions. [2022-04-06 17:33:22,293 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 175 transitions. Word has length 94 [2022-04-06 17:33:22,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:33:22,293 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 175 transitions. [2022-04-06 17:33:22,293 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 1 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 17:33:22,293 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 175 transitions. [2022-04-06 17:33:22,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-04-06 17:33:22,294 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:33:22,294 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 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 17:33:22,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 17:33:22,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:22,504 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:33:22,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:33:22,504 INFO L85 PathProgramCache]: Analyzing trace with hash -321511332, now seen corresponding path program 11 times [2022-04-06 17:33:22,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:22,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [925947242] [2022-04-06 17:33:22,506 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:33:22,506 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:33:22,506 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:33:22,506 INFO L85 PathProgramCache]: Analyzing trace with hash -321511332, now seen corresponding path program 12 times [2022-04-06 17:33:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:33:22,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631099991] [2022-04-06 17:33:22,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:33:22,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:33:22,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:33:22,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1700464427] [2022-04-06 17:33:22,512 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 17:33:22,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:22,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:33:22,513 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 17:33:22,517 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 17:33:22,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 17:33:22,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:33:22,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 18 conjunts are in the unsatisfiable core [2022-04-06 17:33:22,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:33:22,768 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 70 proven. 22 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-04-06 17:33:22,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:33:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 69 proven. 23 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2022-04-06 17:33:23,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:33:23,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631099991] [2022-04-06 17:33:23,534 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:33:23,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700464427] [2022-04-06 17:33:23,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700464427] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:33:23,534 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:33:23,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-04-06 17:33:23,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:33:23,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [925947242] [2022-04-06 17:33:23,534 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [925947242] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:33:23,534 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:33:23,534 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 17:33:23,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252263792] [2022-04-06 17:33:23,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:33:23,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 17:33:23,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:23,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 17:33:23,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-04-06 17:33:23,535 INFO L87 Difference]: Start difference. First operand 154 states and 175 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 17:33:23,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:33:23,656 INFO L93 Difference]: Finished difference Result 164 states and 183 transitions. [2022-04-06 17:33:23,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 17:33:23,656 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 103 [2022-04-06 17:33:23,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:33:23,657 INFO L225 Difference]: With dead ends: 164 [2022-04-06 17:33:23,657 INFO L226 Difference]: Without dead ends: 162 [2022-04-06 17:33:23,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 193 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2022-04-06 17:33:23,658 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 17 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:33:23,658 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 120 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:33:23,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-04-06 17:33:23,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2022-04-06 17:33:23,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 102 states have (on average 1.0980392156862746) internal successors, (112), 106 states have internal predecessors, (112), 36 states have call successors, (36), 24 states have call predecessors, (36), 23 states have return successors, (33), 31 states have call predecessors, (33), 33 states have call successors, (33) [2022-04-06 17:33:23,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 181 transitions. [2022-04-06 17:33:23,671 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 181 transitions. Word has length 103 [2022-04-06 17:33:23,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:33:23,671 INFO L478 AbstractCegarLoop]: Abstraction has 162 states and 181 transitions. [2022-04-06 17:33:23,671 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 17:33:23,671 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 181 transitions. [2022-04-06 17:33:23,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 17:33:23,672 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:33:23,672 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:33:23,689 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 17:33:23,889 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,SelfDestructingSolverStorable12 [2022-04-06 17:33:23,889 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:33:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:33:23,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 3 times [2022-04-06 17:33:23,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:23,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [877853664] [2022-04-06 17:33:23,902 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:33:23,902 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:33:23,902 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:33:23,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1306280540, now seen corresponding path program 4 times [2022-04-06 17:33:23,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:33:23,902 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869397737] [2022-04-06 17:33:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:33:23,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:33:23,908 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:33:23,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255022182] [2022-04-06 17:33:23,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 17:33:23,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:23,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:33:23,909 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 17:33:23,910 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 17:33:23,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 17:33:23,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:33:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 39 conjunts are in the unsatisfiable core [2022-04-06 17:33:23,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:33:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 17:33:24,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:33:27,649 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-04-06 17:33:27,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:33:27,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869397737] [2022-04-06 17:33:27,650 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:33:27,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255022182] [2022-04-06 17:33:27,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255022182] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:33:27,650 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:33:27,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 16 [2022-04-06 17:33:27,650 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:33:27,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [877853664] [2022-04-06 17:33:27,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [877853664] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:33:27,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:33:27,650 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 17:33:27,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018022634] [2022-04-06 17:33:27,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:33:27,651 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 17:33:27,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:27,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 17:33:27,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 17:33:27,651 INFO L87 Difference]: Start difference. First operand 162 states and 181 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 17:33:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:33:27,862 INFO L93 Difference]: Finished difference Result 171 states and 190 transitions. [2022-04-06 17:33:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 17:33:27,862 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) Word has length 105 [2022-04-06 17:33:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:33:27,863 INFO L225 Difference]: With dead ends: 171 [2022-04-06 17:33:27,863 INFO L226 Difference]: Without dead ends: 143 [2022-04-06 17:33:27,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 191 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 17:33:27,864 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 9 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 17:33:27,864 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 276 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 17:33:27,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-04-06 17:33:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-04-06 17:33:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 89 states have (on average 1.101123595505618) internal successors, (98), 92 states have internal predecessors, (98), 33 states have call successors, (33), 21 states have call predecessors, (33), 20 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2022-04-06 17:33:27,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 161 transitions. [2022-04-06 17:33:27,876 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 161 transitions. Word has length 105 [2022-04-06 17:33:27,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:33:27,876 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 161 transitions. [2022-04-06 17:33:27,876 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 7 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 6 states have call predecessors, (17), 6 states have call successors, (17) [2022-04-06 17:33:27,876 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 161 transitions. [2022-04-06 17:33:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 17:33:27,878 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:33:27,878 INFO L499 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:33:27,897 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 17:33:28,091 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,SelfDestructingSolverStorable13 [2022-04-06 17:33:28,091 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:33:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:33:28,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1328912794, now seen corresponding path program 1 times [2022-04-06 17:33:28,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:28,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1456060491] [2022-04-06 17:33:28,095 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:33:28,096 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:33:28,096 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:33:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1328912794, now seen corresponding path program 2 times [2022-04-06 17:33:28,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:33:28,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32528002] [2022-04-06 17:33:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:33:28,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:33:28,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:33:28,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617299229] [2022-04-06 17:33:28,102 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:33:28,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:28,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:33:28,104 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 17:33:28,105 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 17:33:28,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:33:28,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:33:28,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 17:33:28,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:33:28,367 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 222 proven. 0 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2022-04-06 17:33:28,367 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 17:33:28,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:33:28,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32528002] [2022-04-06 17:33:28,367 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:33:28,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617299229] [2022-04-06 17:33:28,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617299229] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:33:28,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:33:28,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:33:28,368 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:33:28,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1456060491] [2022-04-06 17:33:28,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1456060491] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:33:28,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:33:28,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:33:28,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975528041] [2022-04-06 17:33:28,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:33:28,368 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:33:28,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:28,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:33:28,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:33:28,369 INFO L87 Difference]: Start difference. First operand 143 states and 161 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 17:33:28,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:33:28,513 INFO L93 Difference]: Finished difference Result 195 states and 230 transitions. [2022-04-06 17:33:28,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 17:33:28,514 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 105 [2022-04-06 17:33:28,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:33:28,514 INFO L225 Difference]: With dead ends: 195 [2022-04-06 17:33:28,515 INFO L226 Difference]: Without dead ends: 124 [2022-04-06 17:33:28,515 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-04-06 17:33:28,515 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 8 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 17:33:28,515 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 157 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 17:33:28,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-04-06 17:33:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 107. [2022-04-06 17:33:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 68 states have internal predecessors, (73), 23 states have call successors, (23), 17 states have call predecessors, (23), 16 states have return successors, (21), 21 states have call predecessors, (21), 21 states have call successors, (21) [2022-04-06 17:33:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2022-04-06 17:33:28,524 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 105 [2022-04-06 17:33:28,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:33:28,524 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2022-04-06 17:33:28,524 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 17:33:28,524 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2022-04-06 17:33:28,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-04-06 17:33:28,525 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:33:28,525 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:33:28,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 17:33:28,739 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,SelfDestructingSolverStorable14 [2022-04-06 17:33:28,739 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:33:28,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:33:28,740 INFO L85 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 5 times [2022-04-06 17:33:28,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:28,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2031476835] [2022-04-06 17:33:28,742 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:33:28,742 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:33:28,742 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:33:28,742 INFO L85 PathProgramCache]: Analyzing trace with hash -416382532, now seen corresponding path program 6 times [2022-04-06 17:33:28,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:33:28,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993394783] [2022-04-06 17:33:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:33:28,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:33:28,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:33:28,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [115811536] [2022-04-06 17:33:28,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 17:33:28,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:28,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:33:28,749 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 17:33:28,750 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 17:33:28,794 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 17:33:28,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:33:28,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 17:33:28,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:33:29,048 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 17:33:29,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:33:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2022-04-06 17:33:29,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:33:29,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993394783] [2022-04-06 17:33:29,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:33:29,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115811536] [2022-04-06 17:33:29,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115811536] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:33:29,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:33:29,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2022-04-06 17:33:29,279 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:33:29,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2031476835] [2022-04-06 17:33:29,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2031476835] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:33:29,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:33:29,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 17:33:29,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071947063] [2022-04-06 17:33:29,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:33:29,279 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 17:33:29,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 17:33:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:33:29,280 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 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 17:33:29,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:33:29,337 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2022-04-06 17:33:29,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 17:33:29,338 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 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 109 [2022-04-06 17:33:29,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:33:29,339 INFO L225 Difference]: With dead ends: 128 [2022-04-06 17:33:29,339 INFO L226 Difference]: Without dead ends: 120 [2022-04-06 17:33:29,339 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 208 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-04-06 17:33:29,339 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 17 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 17:33:29,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 122 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 17:33:29,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-04-06 17:33:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-04-06 17:33:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 74 states have (on average 1.0945945945945945) internal successors, (81), 75 states have internal predecessors, (81), 29 states have call successors, (29), 17 states have call predecessors, (29), 16 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 17:33:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 137 transitions. [2022-04-06 17:33:29,350 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 137 transitions. Word has length 109 [2022-04-06 17:33:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:33:29,350 INFO L478 AbstractCegarLoop]: Abstraction has 120 states and 137 transitions. [2022-04-06 17:33:29,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 6 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 17:33:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 137 transitions. [2022-04-06 17:33:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-04-06 17:33:29,351 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:33:29,351 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:33:29,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 17:33:29,575 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,SelfDestructingSolverStorable15 [2022-04-06 17:33:29,576 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:33:29,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:33:29,576 INFO L85 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 13 times [2022-04-06 17:33:29,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:29,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [155810962] [2022-04-06 17:33:29,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:33:29,579 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:33:29,579 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:33:29,579 INFO L85 PathProgramCache]: Analyzing trace with hash -76721736, now seen corresponding path program 14 times [2022-04-06 17:33:29,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:33:29,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119985576] [2022-04-06 17:33:29,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:33:29,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:33:29,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:33:29,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [456199466] [2022-04-06 17:33:29,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:33:29,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:29,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:33:29,586 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 17:33:29,587 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 17:33:29,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:33:29,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:33:29,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2022-04-06 17:33:29,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:33:30,093 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 17:33:30,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:33:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 551 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-04-06 17:33:53,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:33:53,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119985576] [2022-04-06 17:33:53,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:33:53,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456199466] [2022-04-06 17:33:53,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456199466] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:33:53,163 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:33:53,163 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2022-04-06 17:33:53,163 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:33:53,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [155810962] [2022-04-06 17:33:53,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [155810962] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:33:53,163 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:33:53,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 17:33:53,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658620985] [2022-04-06 17:33:53,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:33:53,164 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 17:33:53,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:53,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 17:33:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=229, Unknown=1, NotChecked=0, Total=306 [2022-04-06 17:33:53,164 INFO L87 Difference]: Start difference. First operand 120 states and 137 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 17:33:53,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:33:53,495 INFO L93 Difference]: Finished difference Result 180 states and 208 transitions. [2022-04-06 17:33:53,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 17:33:53,496 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 111 [2022-04-06 17:33:53,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:33:53,497 INFO L225 Difference]: With dead ends: 180 [2022-04-06 17:33:53,497 INFO L226 Difference]: Without dead ends: 178 [2022-04-06 17:33:53,497 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 202 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=80, Invalid=261, Unknown=1, NotChecked=0, Total=342 [2022-04-06 17:33:53,497 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 10 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 17:33:53,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 304 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 17:33:53,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-04-06 17:33:53,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2022-04-06 17:33:53,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 109 states have (on average 1.1009174311926606) internal successors, (120), 111 states have internal predecessors, (120), 42 states have call successors, (42), 24 states have call predecessors, (42), 23 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 17:33:53,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 202 transitions. [2022-04-06 17:33:53,517 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 202 transitions. Word has length 111 [2022-04-06 17:33:53,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:33:53,517 INFO L478 AbstractCegarLoop]: Abstraction has 175 states and 202 transitions. [2022-04-06 17:33:53,517 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 7 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 17:33:53,517 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 202 transitions. [2022-04-06 17:33:53,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 17:33:53,518 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:33:53,518 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 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, 1] [2022-04-06 17:33:53,545 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 17:33:53,735 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:53,735 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:33:53,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:33:53,736 INFO L85 PathProgramCache]: Analyzing trace with hash -238794489, now seen corresponding path program 15 times [2022-04-06 17:33:53,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:33:53,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1021483829] [2022-04-06 17:33:53,738 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:33:53,738 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:33:53,738 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:33:53,738 INFO L85 PathProgramCache]: Analyzing trace with hash -238794489, now seen corresponding path program 16 times [2022-04-06 17:33:53,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:33:53,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732270985] [2022-04-06 17:33:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:33:53,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:33:53,749 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:33:53,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1852535176] [2022-04-06 17:33:53,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 17:33:53,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:33:53,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:33:53,752 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 17:33:53,753 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 17:33:53,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 17:33:53,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:33:53,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 17:33:53,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:33:54,352 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 17:33:54,352 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:34:31,711 WARN L232 SmtUtils]: Spent 8.81s on a formula simplification that was a NOOP. DAG size: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 17:36:18,206 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 17:36:18,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:36:18,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732270985] [2022-04-06 17:36:18,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:36:18,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852535176] [2022-04-06 17:36:18,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852535176] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:36:18,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:36:18,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2022-04-06 17:36:18,207 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:36:18,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1021483829] [2022-04-06 17:36:18,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1021483829] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:36:18,207 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:36:18,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 17:36:18,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191725013] [2022-04-06 17:36:18,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:36:18,208 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 17:36:18,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:36:18,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 17:36:18,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=346, Unknown=2, NotChecked=0, Total=462 [2022-04-06 17:36:18,208 INFO L87 Difference]: Start difference. First operand 175 states and 202 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 17:36:18,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:36:18,759 INFO L93 Difference]: Finished difference Result 219 states and 257 transitions. [2022-04-06 17:36:18,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 17:36:18,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 124 [2022-04-06 17:36:18,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:36:18,760 INFO L225 Difference]: With dead ends: 219 [2022-04-06 17:36:18,760 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 17:36:18,761 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 224 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 24.4s TimeCoverageRelationStatistics Valid=118, Invalid=386, Unknown=2, NotChecked=0, Total=506 [2022-04-06 17:36:18,761 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 13 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 17:36:18,761 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 376 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 17:36:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 17:36:18,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2022-04-06 17:36:18,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 118 states have internal predecessors, (127), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 17:36:18,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2022-04-06 17:36:18,778 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 124 [2022-04-06 17:36:18,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:36:18,778 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2022-04-06 17:36:18,779 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 17:36:18,779 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2022-04-06 17:36:18,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 17:36:18,780 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:36:18,780 INFO L499 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:36:18,801 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 17:36:18,995 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,SelfDestructingSolverStorable17 [2022-04-06 17:36:18,995 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:36:18,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:36:18,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1927738231, now seen corresponding path program 1 times [2022-04-06 17:36:18,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:36:18,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1369749821] [2022-04-06 17:36:19,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:36:19,002 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:36:19,002 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:36:19,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1927738231, now seen corresponding path program 2 times [2022-04-06 17:36:19,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:36:19,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823425889] [2022-04-06 17:36:19,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:36:19,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:36:19,010 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:36:19,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1410851329] [2022-04-06 17:36:19,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:36:19,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:36:19,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:36:19,011 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 17:36:19,011 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 17:36:19,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:36:19,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:36:19,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 17:36:19,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:36:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 17:36:19,729 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:36:57,145 WARN L232 SmtUtils]: Spent 8.64s on a formula simplification that was a NOOP. DAG size: 437 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 17:38:28,421 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 36 proven. 51 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2022-04-06 17:38:28,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:38:28,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823425889] [2022-04-06 17:38:28,422 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:38:28,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410851329] [2022-04-06 17:38:28,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410851329] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:38:28,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:38:28,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-06 17:38:28,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:38:28,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1369749821] [2022-04-06 17:38:28,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1369749821] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:38:28,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:38:28,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 17:38:28,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181953471] [2022-04-06 17:38:28,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:38:28,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 17:38:28,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:38:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 17:38:28,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=408, Unknown=1, NotChecked=0, Total=552 [2022-04-06 17:38:28,423 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 17:38:28,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:38:28,905 INFO L93 Difference]: Finished difference Result 237 states and 276 transitions. [2022-04-06 17:38:28,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 17:38:28,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 124 [2022-04-06 17:38:28,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:38:28,907 INFO L225 Difference]: With dead ends: 237 [2022-04-06 17:38:28,907 INFO L226 Difference]: Without dead ends: 197 [2022-04-06 17:38:28,908 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 224 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=147, Invalid=452, Unknown=1, NotChecked=0, Total=600 [2022-04-06 17:38:28,908 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 13 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 17:38:28,908 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 371 Invalid, 827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 17:38:28,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-04-06 17:38:28,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 184. [2022-04-06 17:38:28,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 116 states have (on average 1.0948275862068966) internal successors, (127), 118 states have internal predecessors, (127), 42 states have call successors, (42), 26 states have call predecessors, (42), 25 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 17:38:28,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 209 transitions. [2022-04-06 17:38:28,926 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 209 transitions. Word has length 124 [2022-04-06 17:38:28,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:38:28,926 INFO L478 AbstractCegarLoop]: Abstraction has 184 states and 209 transitions. [2022-04-06 17:38:28,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-04-06 17:38:28,927 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 209 transitions. [2022-04-06 17:38:28,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 17:38:28,927 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:38:28,927 INFO L499 BasicCegarLoop]: trace histogram [20, 19, 19, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:38:28,961 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 17:38:29,128 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:38:29,128 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:38:29,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:38:29,129 INFO L85 PathProgramCache]: Analyzing trace with hash -964214553, now seen corresponding path program 17 times [2022-04-06 17:38:29,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:38:29,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [742922031] [2022-04-06 17:38:29,131 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:38:29,131 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:38:29,131 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:38:29,131 INFO L85 PathProgramCache]: Analyzing trace with hash -964214553, now seen corresponding path program 18 times [2022-04-06 17:38:29,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:38:29,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573449353] [2022-04-06 17:38:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:38:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:38:29,138 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:38:29,138 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423443376] [2022-04-06 17:38:29,138 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 17:38:29,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:38:29,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:38:29,139 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 17:38:29,140 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 17:38:29,212 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 17:38:29,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:38:29,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 17:38:29,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:38:29,645 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 17:38:29,919 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 17:38:30,005 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 199 proven. 27 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2022-04-06 17:38:30,006 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:39:15,853 WARN L232 SmtUtils]: Spent 27.89s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 17:40:01,765 WARN L232 SmtUtils]: Spent 10.67s on a formula simplification that was a NOOP. DAG size: 105 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 17:41:32,073 INFO L134 CoverageAnalysis]: Checked inductivity of 781 backedges. 168 proven. 16 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2022-04-06 17:41:32,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:41:32,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573449353] [2022-04-06 17:41:32,074 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:41:32,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423443376] [2022-04-06 17:41:32,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423443376] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:41:32,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:41:32,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 20 [2022-04-06 17:41:32,074 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:41:32,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [742922031] [2022-04-06 17:41:32,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [742922031] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:41:32,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:41:32,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 17:41:32,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806599558] [2022-04-06 17:41:32,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:41:32,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 17:41:32,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:41:32,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 17:41:32,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=288, Unknown=2, NotChecked=0, Total=380 [2022-04-06 17:41:32,075 INFO L87 Difference]: Start difference. First operand 184 states and 209 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 17:41:34,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:41:34,706 INFO L93 Difference]: Finished difference Result 207 states and 234 transitions. [2022-04-06 17:41:34,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 17:41:34,707 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 128 [2022-04-06 17:41:34,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:41:34,708 INFO L225 Difference]: With dead ends: 207 [2022-04-06 17:41:34,708 INFO L226 Difference]: Without dead ends: 205 [2022-04-06 17:41:34,708 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 231 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 53.6s TimeCoverageRelationStatistics Valid=103, Invalid=357, Unknown=2, NotChecked=0, Total=462 [2022-04-06 17:41:34,708 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 21 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 224 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 17:41:34,708 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 224 Invalid, 540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 17:41:34,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-04-06 17:41:34,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 192. [2022-04-06 17:41:34,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 122 states have (on average 1.0901639344262295) internal successors, (133), 124 states have internal predecessors, (133), 42 states have call successors, (42), 28 states have call predecessors, (42), 27 states have return successors, (40), 39 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 17:41:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 215 transitions. [2022-04-06 17:41:34,729 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 215 transitions. Word has length 128 [2022-04-06 17:41:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:41:34,729 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 215 transitions. [2022-04-06 17:41:34,729 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 17:41:34,729 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 215 transitions. [2022-04-06 17:41:34,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 17:41:34,730 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:41:34,730 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:41:34,748 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 17:41:34,948 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:41:34,951 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:41:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:41:34,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1349759516, now seen corresponding path program 7 times [2022-04-06 17:41:34,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:41:34,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1918546543] [2022-04-06 17:41:34,953 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:41:34,953 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:41:34,953 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:41:34,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1349759516, now seen corresponding path program 8 times [2022-04-06 17:41:34,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:41:34,953 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809210902] [2022-04-06 17:41:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:41:34,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:41:34,958 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:41:34,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [258089020] [2022-04-06 17:41:34,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:41:34,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:41:34,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:41:34,959 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 17:41:34,961 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 17:41:35,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:41:35,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:41:35,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 17:41:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:41:35,499 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 17:41:35,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:41:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 17:41:50,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:41:50,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809210902] [2022-04-06 17:41:50,270 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:41:50,270 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258089020] [2022-04-06 17:41:50,270 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258089020] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:41:50,270 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:41:50,270 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2022-04-06 17:41:50,270 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:41:50,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1918546543] [2022-04-06 17:41:50,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1918546543] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:41:50,271 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:41:50,271 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 17:41:50,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369809344] [2022-04-06 17:41:50,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:41:50,271 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 17:41:50,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:41:50,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 17:41:50,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2022-04-06 17:41:50,272 INFO L87 Difference]: Start difference. First operand 192 states and 215 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 17:41:50,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:41:50,715 INFO L93 Difference]: Finished difference Result 230 states and 263 transitions. [2022-04-06 17:41:50,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 17:41:50,715 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 135 [2022-04-06 17:41:50,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:41:50,716 INFO L225 Difference]: With dead ends: 230 [2022-04-06 17:41:50,716 INFO L226 Difference]: Without dead ends: 204 [2022-04-06 17:41:50,717 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 245 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2022-04-06 17:41:50,717 INFO L913 BasicCegarLoop]: 67 mSDtfsCounter, 9 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 17:41:50,717 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 389 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 17:41:50,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-04-06 17:41:50,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2022-04-06 17:41:50,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 129 states have (on average 1.0852713178294573) internal successors, (140), 131 states have internal predecessors, (140), 45 states have call successors, (45), 29 states have call predecessors, (45), 28 states have return successors, (43), 42 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 17:41:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 228 transitions. [2022-04-06 17:41:50,739 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 228 transitions. Word has length 135 [2022-04-06 17:41:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:41:50,739 INFO L478 AbstractCegarLoop]: Abstraction has 203 states and 228 transitions. [2022-04-06 17:41:50,740 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 17:41:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 228 transitions. [2022-04-06 17:41:50,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 17:41:50,740 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:41:50,740 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:41:50,758 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 17:41:50,955 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:41:50,955 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:41:50,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:41:50,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1372391770, now seen corresponding path program 3 times [2022-04-06 17:41:50,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:41:50,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [988968867] [2022-04-06 17:41:50,958 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:41:50,958 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:41:50,958 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:41:50,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1372391770, now seen corresponding path program 4 times [2022-04-06 17:41:50,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:41:50,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364940137] [2022-04-06 17:41:50,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:41:50,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:41:50,963 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:41:50,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252547189] [2022-04-06 17:41:50,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 17:41:50,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:41:50,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:41:50,966 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 17:41:50,972 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 17:41:51,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 17:41:51,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:41:51,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 50 conjunts are in the unsatisfiable core [2022-04-06 17:41:51,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:41:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2022-04-06 17:41:51,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:41:52,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:41:52,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364940137] [2022-04-06 17:41:52,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:41:52,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252547189] [2022-04-06 17:41:52,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252547189] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 17:41:52,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 17:41:52,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-04-06 17:41:52,563 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:41:52,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [988968867] [2022-04-06 17:41:52,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [988968867] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:41:52,563 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:41:52,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 17:41:52,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105663872] [2022-04-06 17:41:52,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:41:52,563 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 17:41:52,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:41:52,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 17:41:52,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2022-04-06 17:41:52,564 INFO L87 Difference]: Start difference. First operand 203 states and 228 transitions. Second operand has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 17:41:53,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:41:53,031 INFO L93 Difference]: Finished difference Result 239 states and 274 transitions. [2022-04-06 17:41:53,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 17:41:53,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 135 [2022-04-06 17:41:53,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:41:53,033 INFO L225 Difference]: With dead ends: 239 [2022-04-06 17:41:53,033 INFO L226 Difference]: Without dead ends: 213 [2022-04-06 17:41:53,034 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 146 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2022-04-06 17:41:53,034 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 9 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 17:41:53,034 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 352 Invalid, 616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 17:41:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-04-06 17:41:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 201. [2022-04-06 17:41:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 127 states have (on average 1.0866141732283465) internal successors, (138), 130 states have internal predecessors, (138), 45 states have call successors, (45), 29 states have call predecessors, (45), 28 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 17:41:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 226 transitions. [2022-04-06 17:41:53,056 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 226 transitions. Word has length 135 [2022-04-06 17:41:53,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:41:53,056 INFO L478 AbstractCegarLoop]: Abstraction has 201 states and 226 transitions. [2022-04-06 17:41:53,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 14 states have internal predecessors, (32), 9 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-04-06 17:41:53,056 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 226 transitions. [2022-04-06 17:41:53,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-04-06 17:41:53,057 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:41:53,057 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:41:53,083 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 17:41:53,271 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:41:53,271 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:41:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:41:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash 66667591, now seen corresponding path program 1 times [2022-04-06 17:41:53,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:41:53,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1818581685] [2022-04-06 17:41:53,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:41:53,274 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:41:53,274 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:41:53,274 INFO L85 PathProgramCache]: Analyzing trace with hash 66667591, now seen corresponding path program 2 times [2022-04-06 17:41:53,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:41:53,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136686772] [2022-04-06 17:41:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:41:53,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:41:53,279 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:41:53,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1704250731] [2022-04-06 17:41:53,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:41:53,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:41:53,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:41:53,316 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 17:41:53,316 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 17:41:53,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:41:53,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:41:53,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 17:41:53,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:41:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 939 backedges. 42 proven. 57 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 17:41:53,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:42:01,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:42:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136686772] [2022-04-06 17:42:01,511 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:42:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704250731] [2022-04-06 17:42:01,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704250731] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 17:42:01,511 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 17:42:01,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 17:42:01,511 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:42:01,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1818581685] [2022-04-06 17:42:01,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1818581685] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:42:01,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:42:01,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 17:42:01,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307882575] [2022-04-06 17:42:01,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:42:01,512 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 17:42:01,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:42:01,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 17:42:01,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-04-06 17:42:01,512 INFO L87 Difference]: Start difference. First operand 201 states and 226 transitions. Second operand has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-04-06 17:42:01,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:42:01,898 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2022-04-06 17:42:01,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 17:42:01,898 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 140 [2022-04-06 17:42:01,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:42:01,899 INFO L225 Difference]: With dead ends: 208 [2022-04-06 17:42:01,899 INFO L226 Difference]: Without dead ends: 154 [2022-04-06 17:42:01,899 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-04-06 17:42:01,900 INFO L913 BasicCegarLoop]: 76 mSDtfsCounter, 16 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 17:42:01,900 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 471 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 17:42:01,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-04-06 17:42:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 154. [2022-04-06 17:42:01,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 97 states have (on average 1.092783505154639) internal successors, (106), 98 states have internal predecessors, (106), 34 states have call successors, (34), 23 states have call predecessors, (34), 22 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32) [2022-04-06 17:42:01,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2022-04-06 17:42:01,914 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 140 [2022-04-06 17:42:01,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:42:01,914 INFO L478 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2022-04-06 17:42:01,914 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.2857142857142856) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-04-06 17:42:01,914 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2022-04-06 17:42:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 17:42:01,914 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:42:01,914 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:42:01,933 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 17:42:02,131 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,SelfDestructingSolverStorable22 [2022-04-06 17:42:02,131 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:42:02,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:42:02,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1044299320, now seen corresponding path program 19 times [2022-04-06 17:42:02,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:42:02,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1442217561] [2022-04-06 17:42:02,134 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:42:02,134 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:42:02,134 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:42:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1044299320, now seen corresponding path program 20 times [2022-04-06 17:42:02,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:42:02,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502366057] [2022-04-06 17:42:02,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:42:02,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:42:02,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:42:02,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994552782] [2022-04-06 17:42:02,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 17:42:02,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:42:02,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:42:02,140 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 17:42:02,141 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 17:42:02,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 17:42:02,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:42:02,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 17:42:02,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:42:02,837 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 42 proven. 71 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 17:42:02,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:42:46,963 WARN L232 SmtUtils]: Spent 8.61s on a formula simplification that was a NOOP. DAG size: 433 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 17:44:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 42 proven. 71 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 17:44:45,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 17:44:45,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502366057] [2022-04-06 17:44:45,506 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 17:44:45,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994552782] [2022-04-06 17:44:45,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994552782] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 17:44:45,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 17:44:45,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2022-04-06 17:44:45,507 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 17:44:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1442217561] [2022-04-06 17:44:45,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1442217561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 17:44:45,507 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 17:44:45,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 17:44:45,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366385343] [2022-04-06 17:44:45,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 17:44:45,507 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 17:44:45,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 17:44:45,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 17:44:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=412, Unknown=4, NotChecked=0, Total=552 [2022-04-06 17:44:45,508 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-04-06 17:44:46,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 17:44:46,201 INFO L93 Difference]: Finished difference Result 233 states and 265 transitions. [2022-04-06 17:44:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 17:44:46,202 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) Word has length 141 [2022-04-06 17:44:46,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 17:44:46,203 INFO L225 Difference]: With dead ends: 233 [2022-04-06 17:44:46,203 INFO L226 Difference]: Without dead ends: 225 [2022-04-06 17:44:46,204 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 256 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 30.6s TimeCoverageRelationStatistics Valid=140, Invalid=456, Unknown=4, NotChecked=0, Total=600 [2022-04-06 17:44:46,204 INFO L913 BasicCegarLoop]: 65 mSDtfsCounter, 12 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 977 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 17:44:46,204 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 418 Invalid, 977 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 17:44:46,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-04-06 17:44:46,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 212. [2022-04-06 17:44:46,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 134 states have (on average 1.0895522388059702) internal successors, (146), 137 states have internal predecessors, (146), 47 states have call successors, (47), 31 states have call predecessors, (47), 30 states have return successors, (45), 43 states have call predecessors, (45), 45 states have call successors, (45) [2022-04-06 17:44:46,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 238 transitions. [2022-04-06 17:44:46,224 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 238 transitions. Word has length 141 [2022-04-06 17:44:46,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 17:44:46,224 INFO L478 AbstractCegarLoop]: Abstraction has 212 states and 238 transitions. [2022-04-06 17:44:46,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 9 states have call successors, (25), 2 states have call predecessors, (25), 1 states have return successors, (23), 8 states have call predecessors, (23), 8 states have call successors, (23) [2022-04-06 17:44:46,225 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 238 transitions. [2022-04-06 17:44:46,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2022-04-06 17:44:46,225 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 17:44:46,225 INFO L499 BasicCegarLoop]: trace histogram [22, 21, 21, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 17:44:46,242 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 17:44:46,439 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,SelfDestructingSolverStorable23 [2022-04-06 17:44:46,439 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 17:44:46,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 17:44:46,440 INFO L85 PathProgramCache]: Analyzing trace with hash -644644422, now seen corresponding path program 3 times [2022-04-06 17:44:46,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 17:44:46,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1045854495] [2022-04-06 17:44:46,443 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-04-06 17:44:46,443 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because UNSUPPORTED_EIGENVALUES [2022-04-06 17:44:46,443 INFO L274 tedInterpolationCore]: Could not compute an accelerate. [2022-04-06 17:44:46,443 INFO L85 PathProgramCache]: Analyzing trace with hash -644644422, now seen corresponding path program 4 times [2022-04-06 17:44:46,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 17:44:46,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424738470] [2022-04-06 17:44:46,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 17:44:46,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 17:44:46,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 17:44:46,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247500779] [2022-04-06 17:44:46,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 17:44:46,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 17:44:46,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 17:44:46,454 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 17:44:46,455 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 17:44:46,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 17:44:46,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 17:44:46,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 49 conjunts are in the unsatisfiable core [2022-04-06 17:44:46,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 17:44:47,128 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 42 proven. 71 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2022-04-06 17:44:47,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 17:45:22,103 WARN L232 SmtUtils]: Spent 8.26s on a formula simplification that was a NOOP. DAG size: 429 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)