/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/cohencu-ll_valuebound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:07:10,441 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:07:10,466 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:07:10,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 14:07:10,532 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:07:10,532 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:07:10,534 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:07:10,534 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-20 14:07:10,542 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:07:10,542 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:07:10,544 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:07:10,544 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:07:10,544 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:07:10,544 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:07:10,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:07:10,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:07:10,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:07:10,545 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:07:10,545 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:07:10,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:07:10,545 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:07:10,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:07:10,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:07:10,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:07:10,546 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:07:10,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:07:10,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:07:10,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:07:10,546 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:07:10,546 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:07:10,546 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:07:10,546 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:07:10,546 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:07:10,546 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:07:10,741 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:07:10,757 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:07:10,758 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:07:10,759 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:07:10,760 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:07:10,760 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound100.c [2022-03-20 14:07:10,821 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ae2049ea/81e3d84c5d3a499fba77e3273a50a85c/FLAGdcbfd3383 [2022-03-20 14:07:11,177 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:07:11,178 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound100.c [2022-03-20 14:07:11,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ae2049ea/81e3d84c5d3a499fba77e3273a50a85c/FLAGdcbfd3383 [2022-03-20 14:07:11,202 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5ae2049ea/81e3d84c5d3a499fba77e3273a50a85c [2022-03-20 14:07:11,203 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:07:11,205 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:07:11,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:07:11,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:07:11,209 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:07:11,209 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:07:11" (1/1) ... [2022-03-20 14:07:11,210 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@daee54e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11, skipping insertion in model container [2022-03-20 14:07:11,210 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:07:11" (1/1) ... [2022-03-20 14:07:11,215 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:07:11,226 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:07:11,357 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2022-03-20 14:07:11,389 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:07:11,394 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:07:11,401 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound100.c[588,601] [2022-03-20 14:07:11,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:07:11,415 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:07:11,415 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11 WrapperNode [2022-03-20 14:07:11,415 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:07:11,416 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:07:11,416 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:07:11,416 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:07:11,423 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11" (1/1) ... [2022-03-20 14:07:11,423 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11" (1/1) ... [2022-03-20 14:07:11,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11" (1/1) ... [2022-03-20 14:07:11,429 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11" (1/1) ... [2022-03-20 14:07:11,432 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11" (1/1) ... [2022-03-20 14:07:11,434 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11" (1/1) ... [2022-03-20 14:07:11,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11" (1/1) ... [2022-03-20 14:07:11,436 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:07:11,436 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:07:11,436 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:07:11,436 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:07:11,437 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11" (1/1) ... [2022-03-20 14:07:11,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:07:11,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:07:11,460 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) [2022-03-20 14:07:11,462 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 [2022-03-20 14:07:11,485 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:07:11,486 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:07:11,486 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:07:11,486 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:07:11,486 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:07:11,486 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:07:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:07:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:07:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:07:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:07:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-20 14:07:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:07:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:07:11,486 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:07:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:07:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:07:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:07:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:07:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:07:11,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:07:11,532 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:07:11,533 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:07:11,643 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:07:11,647 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:07:11,647 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 14:07:11,648 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:07:11 BoogieIcfgContainer [2022-03-20 14:07:11,648 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:07:11,649 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:07:11,649 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:07:11,654 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:07:11,654 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:07:11" (1/3) ... [2022-03-20 14:07:11,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7706e479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:07:11, skipping insertion in model container [2022-03-20 14:07:11,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:07:11" (2/3) ... [2022-03-20 14:07:11,655 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7706e479 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:07:11, skipping insertion in model container [2022-03-20 14:07:11,655 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:07:11" (3/3) ... [2022-03-20 14:07:11,656 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound100.c [2022-03-20 14:07:11,659 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:07:11,659 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:07:11,692 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:07:11,701 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 [2022-03-20 14:07:11,701 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:07:11,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 14:07:11,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 14:07:11,725 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:07:11,725 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:07:11,726 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:07:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:07:11,730 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 1 times [2022-03-20 14:07:11,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:11,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [952577586] [2022-03-20 14:07:11,743 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:07:11,743 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 2 times [2022-03-20 14:07:11,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:07:11,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777175254] [2022-03-20 14:07:11,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:07:11,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:07:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:07:11,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:07:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:07:11,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:07:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:07:11,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:07:11,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:07:11,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777175254] [2022-03-20 14:07:11,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777175254] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:11,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:11,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:07:11,917 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:07:11,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [952577586] [2022-03-20 14:07:11,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [952577586] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:11,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:11,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:07:11,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014124469] [2022-03-20 14:07:11,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:07:11,920 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:07:11,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:11,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:07:11,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:07:11,937 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 14:07:12,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:07:12,002 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2022-03-20 14:07:12,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:07:12,015 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 [2022-03-20 14:07:12,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:07:12,019 INFO L225 Difference]: With dead ends: 63 [2022-03-20 14:07:12,020 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 14:07:12,022 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 [2022-03-20 14:07:12,024 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:07:12,024 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:07:12,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 14:07:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 14:07:12,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:07:12,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-03-20 14:07:12,056 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-03-20 14:07:12,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:07:12,056 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-03-20 14:07:12,056 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) [2022-03-20 14:07:12,056 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-03-20 14:07:12,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 14:07:12,057 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:07:12,057 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:07:12,057 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:07:12,057 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:07:12,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:07:12,058 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 1 times [2022-03-20 14:07:12,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:12,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2040490290] [2022-03-20 14:07:12,058 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:07:12,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 2 times [2022-03-20 14:07:12,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:07:12,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529797326] [2022-03-20 14:07:12,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:07:12,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:07:12,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:07:12,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:07:12,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:07:12,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:07:12,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:07:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:07:12,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:07:12,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529797326] [2022-03-20 14:07:12,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529797326] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:12,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:12,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:07:12,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:07:12,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2040490290] [2022-03-20 14:07:12,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2040490290] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:12,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:12,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:07:12,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129199119] [2022-03-20 14:07:12,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:07:12,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:07:12,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:12,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:07:12,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:07:12,203 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-03-20 14:07:12,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:07:12,384 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-03-20 14:07:12,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 14:07:12,384 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 [2022-03-20 14:07:12,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:07:12,385 INFO L225 Difference]: With dead ends: 37 [2022-03-20 14:07:12,385 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 14:07:12,386 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:07:12,386 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 22 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:07:12,387 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 43 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:07:12,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 14:07:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 14:07:12,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-20 14:07:12,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 14:07:12,396 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-03-20 14:07:12,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:07:12,396 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 14:07:12,396 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) [2022-03-20 14:07:12,397 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 14:07:12,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 14:07:12,397 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:07:12,397 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] [2022-03-20 14:07:12,397 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 14:07:12,397 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:07:12,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:07:12,398 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 1 times [2022-03-20 14:07:12,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:12,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [818754903] [2022-03-20 14:07:12,399 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:07:12,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 2 times [2022-03-20 14:07:12,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:07:12,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090005983] [2022-03-20 14:07:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:07:12,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:07:12,425 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:07:12,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [55266943] [2022-03-20 14:07:12,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:07:12,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:12,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:07:12,443 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) [2022-03-20 14:07:12,451 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-20 14:07:12,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:07:12,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:07:12,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:07:12,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:07:12,605 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:07:12,605 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:07:12,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:07:12,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090005983] [2022-03-20 14:07:12,606 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:07:12,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55266943] [2022-03-20 14:07:12,606 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55266943] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:12,606 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:12,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:07:12,607 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:07:12,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [818754903] [2022-03-20 14:07:12,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [818754903] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:12,607 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:12,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:07:12,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635851844] [2022-03-20 14:07:12,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:07:12,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:07:12,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:12,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:07:12,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:07:12,608 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:07:12,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:07:12,662 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-03-20 14:07:12,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:07:12,663 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-03-20 14:07:12,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:07:12,664 INFO L225 Difference]: With dead ends: 54 [2022-03-20 14:07:12,664 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 14:07:12,664 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:07:12,665 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 6 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:07:12,665 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 168 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:07:12,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 14:07:12,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-03-20 14:07:12,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-03-20 14:07:12,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-03-20 14:07:12,681 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-03-20 14:07:12,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:07:12,681 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-03-20 14:07:12,681 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-03-20 14:07:12,681 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-03-20 14:07:12,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 14:07:12,682 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:07:12,682 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] [2022-03-20 14:07:12,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-20 14:07:12,882 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:12,883 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:07:12,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:07:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 1 times [2022-03-20 14:07:12,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:12,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [447420622] [2022-03-20 14:07:12,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:07:12,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 2 times [2022-03-20 14:07:12,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:07:12,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947068460] [2022-03-20 14:07:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:07:12,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:07:12,917 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:07:12,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [800897932] [2022-03-20 14:07:12,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:07:12,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:12,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:07:12,920 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) [2022-03-20 14:07:12,967 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-20 14:07:12,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:07:12,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:07:12,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:07:12,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:07:13,070 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-03-20 14:07:13,070 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:07:13,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:07:13,071 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947068460] [2022-03-20 14:07:13,071 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:07:13,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800897932] [2022-03-20 14:07:13,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800897932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:13,072 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:13,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:07:13,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:07:13,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [447420622] [2022-03-20 14:07:13,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [447420622] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:13,074 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:13,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:07:13,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736068202] [2022-03-20 14:07:13,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:07:13,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:07:13,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:13,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:07:13,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:07:13,083 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-20 14:07:13,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:07:13,139 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-03-20 14:07:13,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:07:13,139 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 [2022-03-20 14:07:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:07:13,144 INFO L225 Difference]: With dead ends: 58 [2022-03-20 14:07:13,144 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 14:07:13,149 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 [2022-03-20 14:07:13,152 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:07:13,152 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 165 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:07:13,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 14:07:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-20 14:07:13,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 21 states have call successors, (21), 7 states have call predecessors, (21), 6 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-20 14:07:13,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-03-20 14:07:13,173 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-03-20 14:07:13,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:07:13,174 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-03-20 14:07:13,174 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) [2022-03-20 14:07:13,174 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-03-20 14:07:13,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 14:07:13,175 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:07:13,175 INFO L499 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:07:13,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-20 14:07:13,386 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-03-20 14:07:13,386 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:07:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:07:13,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 1 times [2022-03-20 14:07:13,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:13,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [948533345] [2022-03-20 14:07:13,388 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:07:13,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 2 times [2022-03-20 14:07:13,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:07:13,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446088356] [2022-03-20 14:07:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:07:13,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:07:13,395 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:07:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1779466165] [2022-03-20 14:07:13,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:07:13,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:13,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:07:13,397 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) [2022-03-20 14:07:13,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-20 14:07:13,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:07:13,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:07:13,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:07:13,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:07:13,512 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 14:07:13,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:07:13,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:07:13,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446088356] [2022-03-20 14:07:13,513 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:07:13,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779466165] [2022-03-20 14:07:13,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779466165] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:13,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:13,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:07:13,513 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:07:13,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [948533345] [2022-03-20 14:07:13,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [948533345] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:07:13,514 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:07:13,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:07:13,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517845755] [2022-03-20 14:07:13,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:07:13,514 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:07:13,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:13,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:07:13,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:07:13,515 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:07:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:07:13,571 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-03-20 14:07:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:07:13,572 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2022-03-20 14:07:13,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:07:13,573 INFO L225 Difference]: With dead ends: 66 [2022-03-20 14:07:13,573 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 14:07:13,573 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:07:13,574 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 14:07:13,574 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 14:07:13,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 14:07:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 14:07:13,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:07:13,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-20 14:07:13,582 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-03-20 14:07:13,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:07:13,582 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-20 14:07:13,582 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-20 14:07:13,582 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-20 14:07:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 14:07:13,583 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:07:13,583 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:07:13,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-20 14:07:13,792 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:07:13,793 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:07:13,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:07:13,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 1 times [2022-03-20 14:07:13,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:07:13,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1955971529] [2022-03-20 14:08:05,248 WARN L232 SmtUtils]: Spent 51.21s on a formula simplification. DAG size of input: 192 DAG size of output: 185 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 14:08:05,254 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:08:05,255 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:08:05,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1018400594, now seen corresponding path program 1 times [2022-03-20 14:08:05,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:08:05,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620213825] [2022-03-20 14:08:05,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:08:05,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:08:05,266 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:08:05,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1348427028] [2022-03-20 14:08:05,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:08:05,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:08:05,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:08:05,271 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) [2022-03-20 14:08:05,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-20 14:08:05,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:08:05,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-20 14:08:05,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:08:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:08:07,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:08:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 14:08:08,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:08:08,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620213825] [2022-03-20 14:08:08,019 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:08:08,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348427028] [2022-03-20 14:08:08,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348427028] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:08:08,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:08:08,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 14:09:52,721 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:09:52,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1955971529] [2022-03-20 14:09:52,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1955971529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:09:52,722 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:09:52,722 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 14:09:52,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219014380] [2022-03-20 14:09:52,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:09:52,722 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 14:09:52,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:09:52,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 14:09:52,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=968, Unknown=33, NotChecked=0, Total=1190 [2022-03-20 14:09:52,723 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 14:09:58,269 WARN L232 SmtUtils]: Spent 5.37s on a formula simplification. DAG size of input: 103 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:10:17,516 WARN L232 SmtUtils]: Spent 8.05s on a formula simplification. DAG size of input: 89 DAG size of output: 78 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:10:18,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:10:18,124 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-03-20 14:10:18,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 14:10:18,125 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 49 [2022-03-20 14:10:18,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:10:18,126 INFO L225 Difference]: With dead ends: 74 [2022-03-20 14:10:18,126 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 14:10:18,126 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 129.2s TimeCoverageRelationStatistics Valid=244, Invalid=1281, Unknown=35, NotChecked=0, Total=1560 [2022-03-20 14:10:18,127 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 14:10:18,127 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 386 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 116 Unchecked, 0.5s Time] [2022-03-20 14:10:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 14:10:18,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-03-20 14:10:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 states have internal predecessors, (45), 19 states have call successors, (19), 13 states have call predecessors, (19), 11 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-20 14:10:18,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-03-20 14:10:18,139 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 49 [2022-03-20 14:10:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:10:18,139 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-03-20 14:10:18,139 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (10), 7 states have call predecessors, (10), 7 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-03-20 14:10:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-03-20 14:10:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 14:10:18,140 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:10:18,140 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:10:18,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-03-20 14:10:18,345 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:10:18,345 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:10:18,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:10:18,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 2 times [2022-03-20 14:10:18,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:10:18,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1245063558] [2022-03-20 14:12:17,424 WARN L232 SmtUtils]: Spent 1.98m on a formula simplification. DAG size of input: 192 DAG size of output: 188 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 14:12:17,427 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:12:17,432 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:12:17,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1063970467, now seen corresponding path program 1 times [2022-03-20 14:12:17,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:12:17,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900162281] [2022-03-20 14:12:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:12:17,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:12:17,439 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:12:17,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251148221] [2022-03-20 14:12:17,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:12:17,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:12:17,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:12:17,441 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) [2022-03-20 14:12:17,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-20 14:12:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 14:12:17,603 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 14:12:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 14:12:17,865 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 14:12:17,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 3 times [2022-03-20 14:12:17,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:12:17,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128125252] [2022-03-20 14:12:17,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:12:17,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:12:17,872 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:12:17,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2076945109] [2022-03-20 14:12:17,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 14:12:17,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:12:17,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:12:17,874 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) [2022-03-20 14:12:17,874 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-20 14:12:17,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 14:12:17,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:12:17,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 14:12:17,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:12:18,636 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 14:12:18,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:12:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-03-20 14:12:19,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:12:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128125252] [2022-03-20 14:12:19,055 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:12:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076945109] [2022-03-20 14:12:19,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076945109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:12:19,055 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:12:19,055 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 14:12:19,055 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:12:19,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1245063558] [2022-03-20 14:12:19,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1245063558] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:12:19,056 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:12:19,056 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:12:19,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053441823] [2022-03-20 14:12:19,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:12:19,056 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:12:19,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:12:19,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:12:19,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:12:19,057 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:12:19,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:12:19,584 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-03-20 14:12:19,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:12:19,586 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 54 [2022-03-20 14:12:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:12:19,587 INFO L225 Difference]: With dead ends: 91 [2022-03-20 14:12:19,587 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 14:12:19,588 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:12:19,588 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 6 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 14:12:19,588 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 238 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 14:12:19,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 14:12:19,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2022-03-20 14:12:19,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 46 states have internal predecessors, (49), 22 states have call successors, (22), 14 states have call predecessors, (22), 12 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 14:12:19,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-03-20 14:12:19,608 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 54 [2022-03-20 14:12:19,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:12:19,609 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-03-20 14:12:19,609 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-03-20 14:12:19,609 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-03-20 14:12:19,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:12:19,615 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:12:19,615 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 14:12:19,622 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-03-20 14:12:19,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-20 14:12:20,038 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:12:20,038 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:12:20,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:12:20,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1546120389, now seen corresponding path program 4 times [2022-03-20 14:12:20,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:12:20,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1643735917] [2022-03-20 14:13:40,342 WARN L232 SmtUtils]: Spent 1.34m on a formula simplification. DAG size of input: 192 DAG size of output: 190 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 14:13:40,345 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:13:40,346 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:13:40,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1624834318, now seen corresponding path program 1 times [2022-03-20 14:13:40,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:13:40,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872058842] [2022-03-20 14:13:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:13:40,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:13:40,353 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:13:40,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [867584411] [2022-03-20 14:13:40,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:13:40,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:13:40,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:13:40,355 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) [2022-03-20 14:13:40,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-20 14:13:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:13:40,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 14:13:40,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:14:34,510 WARN L232 SmtUtils]: Spent 32.26s on a formula simplification. DAG size of input: 114 DAG size of output: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:14:52,957 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 14:14:52,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:15:03,538 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-20 14:15:03,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:15:03,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872058842] [2022-03-20 14:15:03,538 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:15:03,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867584411] [2022-03-20 14:15:03,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867584411] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:15:03,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:15:03,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-03-20 14:16:43,455 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:16:43,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1643735917] [2022-03-20 14:16:43,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1643735917] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:16:43,456 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:16:43,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 14:16:43,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982054635] [2022-03-20 14:16:43,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:16:43,456 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 14:16:43,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:16:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 14:16:43,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1032, Unknown=33, NotChecked=0, Total=1260 [2022-03-20 14:16:43,457 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-20 14:17:22,598 WARN L232 SmtUtils]: Spent 15.01s on a formula simplification that was a NOOP. DAG size: 95 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:17:35,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:17:35,111 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-03-20 14:17:35,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 14:17:35,112 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) Word has length 59 [2022-03-20 14:17:35,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:17:35,114 INFO L225 Difference]: With dead ends: 94 [2022-03-20 14:17:35,114 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 14:17:35,114 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 58 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 199.0s TimeCoverageRelationStatistics Valid=258, Invalid=1421, Unknown=43, NotChecked=0, Total=1722 [2022-03-20 14:17:35,115 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 164 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 14:17:35,115 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 346 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 63 Invalid, 0 Unknown, 164 Unchecked, 0.7s Time] [2022-03-20 14:17:35,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 14:17:35,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-20 14:17:35,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 22 states have call successors, (22), 17 states have call predecessors, (22), 15 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2022-03-20 14:17:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-03-20 14:17:35,149 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 59 [2022-03-20 14:17:35,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:17:35,149 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-03-20 14:17:35,149 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 17 states have internal predecessors, (31), 8 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2022-03-20 14:17:35,149 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-03-20 14:17:35,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 14:17:35,150 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:17:35,150 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 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] [2022-03-20 14:17:35,159 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-20 14:17:35,356 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:17:35,357 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:17:35,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:17:35,357 INFO L85 PathProgramCache]: Analyzing trace with hash -389057674, now seen corresponding path program 5 times [2022-03-20 14:17:35,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:17:35,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [176847451] [2022-03-20 14:19:33,225 WARN L232 SmtUtils]: Spent 1.96m on a formula simplification. DAG size of input: 195 DAG size of output: 188 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 14:19:33,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 4 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 4=1}}, 0 SequentialAcceleration, 1 AlternatingAcceleration, 0 QuantifierFreeResult [2022-03-20 14:19:33,228 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:19:33,228 INFO L85 PathProgramCache]: Analyzing trace with hash 746353091, now seen corresponding path program 1 times [2022-03-20 14:19:33,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:19:33,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750066796] [2022-03-20 14:19:33,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:19:33,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:19:33,259 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:19:33,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [29679973] [2022-03-20 14:19:33,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:19:33,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:19:33,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:19:33,267 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) [2022-03-20 14:19:33,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-20 14:19:33,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:19:33,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 14:19:33,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:19:49,825 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 14:19:49,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:20:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 14:20:46,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:20:46,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750066796] [2022-03-20 14:20:46,772 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:20:46,772 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29679973] [2022-03-20 14:20:46,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29679973] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:20:46,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:20:46,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2022-03-20 14:21:41,843 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:21:41,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [176847451] [2022-03-20 14:21:41,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [176847451] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:21:41,843 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:21:41,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-03-20 14:21:41,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717181463] [2022-03-20 14:21:41,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:21:41,844 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-03-20 14:21:41,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:21:41,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-03-20 14:21:41,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=1098, Unknown=10, NotChecked=0, Total=1332 [2022-03-20 14:21:41,845 INFO L87 Difference]: Start difference. First operand 92 states and 100 transitions. Second operand has 30 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 17 states have internal predecessors, (34), 9 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 9 states have call predecessors, (11), 8 states have call successors, (11)