/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_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 14:11:00,286 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 14:11:00,288 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 14:11:00,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 14:11:00,376 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 14:11:00,376 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 14:11:00,378 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 14:11:00,379 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 14:11:00,389 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 14:11:00,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 14:11:00,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 14:11:00,391 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-20 14:11:00,391 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 14:11:00,391 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-20 14:11:00,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 14:11:00,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 14:11:00,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 14:11:00,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 14:11:00,393 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-20 14:11:00,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 14:11:00,393 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 14:11:00,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 14:11:00,393 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 14:11:00,393 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 14:11:00,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 14:11:00,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 14:11:00,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:11:00,394 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 14:11:00,394 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 14:11:00,394 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 14:11:00,394 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 14:11:00,394 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 14:11:00,395 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-20 14:11:00,395 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 14:11:00,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 14:11:00,644 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 14:11:00,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 14:11:00,647 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 14:11:00,647 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 14:11:00,648 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2022-03-20 14:11:00,704 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c37e66b8/cf4a667602c344dd8c39f60b1da98a77/FLAG3e5b36c01 [2022-03-20 14:11:01,064 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 14:11:01,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c [2022-03-20 14:11:01,069 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c37e66b8/cf4a667602c344dd8c39f60b1da98a77/FLAG3e5b36c01 [2022-03-20 14:11:01,490 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0c37e66b8/cf4a667602c344dd8c39f60b1da98a77 [2022-03-20 14:11:01,492 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 14:11:01,493 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 14:11:01,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 14:11:01,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 14:11:01,503 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 14:11:01,504 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:11:01" (1/1) ... [2022-03-20 14:11:01,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b2f0633 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01, skipping insertion in model container [2022-03-20 14:11:01,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 02:11:01" (1/1) ... [2022-03-20 14:11:01,510 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 14:11:01,523 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 14:11:01,642 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c[588,601] [2022-03-20 14:11:01,683 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:11:01,689 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 14:11:01,697 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound50.c[588,601] [2022-03-20 14:11:01,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 14:11:01,714 INFO L208 MainTranslator]: Completed translation [2022-03-20 14:11:01,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01 WrapperNode [2022-03-20 14:11:01,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 14:11:01,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 14:11:01,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 14:11:01,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 14:11:01,723 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01" (1/1) ... [2022-03-20 14:11:01,723 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01" (1/1) ... [2022-03-20 14:11:01,741 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01" (1/1) ... [2022-03-20 14:11:01,742 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01" (1/1) ... [2022-03-20 14:11:01,746 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01" (1/1) ... [2022-03-20 14:11:01,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01" (1/1) ... [2022-03-20 14:11:01,758 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01" (1/1) ... [2022-03-20 14:11:01,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 14:11:01,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 14:11:01,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 14:11:01,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 14:11:01,760 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01" (1/1) ... [2022-03-20 14:11:01,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 14:11:01,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:01,796 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 14:11:01,823 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 14:11:01,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 14:11:01,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 14:11:01,844 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 14:11:01,845 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-20 14:11:01,845 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 14:11:01,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 14:11:01,845 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 14:11:01,845 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 14:11:01,845 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 14:11:01,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 14:11:01,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2022-03-20 14:11:01,846 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-20 14:11:01,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 14:11:01,848 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 14:11:01,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 14:11:01,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 14:11:01,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 14:11:01,849 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 14:11:01,849 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 14:11:01,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 14:11:01,907 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 14:11:01,908 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 14:11:02,014 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 14:11:02,019 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 14:11:02,019 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 14:11:02,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:11:02 BoogieIcfgContainer [2022-03-20 14:11:02,020 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 14:11:02,022 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 14:11:02,022 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 14:11:02,025 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 14:11:02,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 02:11:01" (1/3) ... [2022-03-20 14:11:02,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377411d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:11:02, skipping insertion in model container [2022-03-20 14:11:02,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 02:11:01" (2/3) ... [2022-03-20 14:11:02,026 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@377411d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 02:11:02, skipping insertion in model container [2022-03-20 14:11:02,026 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 02:11:02" (3/3) ... [2022-03-20 14:11:02,027 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound50.c [2022-03-20 14:11:02,031 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 14:11:02,031 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 14:11:02,065 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 14:11:02,071 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 14:11:02,071 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 14:11:02,096 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 14:11:02,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 14:11:02,102 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:02,102 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 14:11:02,102 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:02,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:02,106 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 1 times [2022-03-20 14:11:02,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:02,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1912807477] [2022-03-20 14:11:02,148 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:02,149 INFO L85 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 2 times [2022-03-20 14:11:02,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:02,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603632550] [2022-03-20 14:11:02,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:02,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:02,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:11:02,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:02,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:11:02,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:02,334 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 14:11:02,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:02,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603632550] [2022-03-20 14:11:02,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603632550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:02,336 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:02,336 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:11:02,338 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:02,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1912807477] [2022-03-20 14:11:02,339 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1912807477] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:02,339 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:02,339 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-20 14:11:02,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273894202] [2022-03-20 14:11:02,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:02,346 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-20 14:11:02,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:02,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-20 14:11:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-20 14:11:02,386 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 14:11:02,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:02,493 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2022-03-20 14:11:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-20 14:11:02,496 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 14:11:02,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:02,501 INFO L225 Difference]: With dead ends: 63 [2022-03-20 14:11:02,502 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 14:11:02,504 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 14:11:02,507 INFO L913 BasicCegarLoop]: 34 mSDtfsCounter, 15 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 14:11:02,508 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 37 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 14:11:02,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 14:11:02,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 14:11:02,540 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 14:11:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-03-20 14:11:02,543 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2022-03-20 14:11:02,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:02,543 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-03-20 14:11:02,544 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 14:11:02,544 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-03-20 14:11:02,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-20 14:11:02,545 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:02,545 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 14:11:02,545 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 14:11:02,545 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:02,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:02,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 1 times [2022-03-20 14:11:02,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:02,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1893770371] [2022-03-20 14:11:02,547 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:02,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 2 times [2022-03-20 14:11:02,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:02,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813722032] [2022-03-20 14:11:02,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:02,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:02,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 14:11:02,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:02,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-20 14:11:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:11:02,713 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 14:11:02,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:02,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813722032] [2022-03-20 14:11:02,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813722032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:02,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:02,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:11:02,715 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:02,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1893770371] [2022-03-20 14:11:02,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1893770371] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:02,715 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:02,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:11:02,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597960762] [2022-03-20 14:11:02,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:02,716 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:11:02,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:02,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:11:02,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 14:11:02,718 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 14:11:02,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:02,861 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2022-03-20 14:11:02,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 14:11:02,862 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 14:11:02,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:02,863 INFO L225 Difference]: With dead ends: 37 [2022-03-20 14:11:02,863 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 14:11:02,864 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 14:11:02,865 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 14:11:02,866 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 14:11:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 14:11:02,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 14:11:02,877 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 14:11:02,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2022-03-20 14:11:02,878 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2022-03-20 14:11:02,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:02,878 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2022-03-20 14:11:02,879 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 14:11:02,879 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2022-03-20 14:11:02,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 14:11:02,879 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:02,879 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 14:11:02,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 14:11:02,880 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:02,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:02,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 1 times [2022-03-20 14:11:02,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:02,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1597445167] [2022-03-20 14:11:02,881 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:02,882 INFO L85 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 2 times [2022-03-20 14:11:02,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:02,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948549121] [2022-03-20 14:11:02,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:02,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:02,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:11:02,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1731795765] [2022-03-20 14:11:02,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:11:02,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:11:02,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:02,895 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 14:11:02,926 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 14:11:02,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:11:02,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:11:02,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:11:02,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:11:03,031 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 14:11:03,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:11:03,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948549121] [2022-03-20 14:11:03,032 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:11:03,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731795765] [2022-03-20 14:11:03,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731795765] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:03,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:03,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:11:03,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:03,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1597445167] [2022-03-20 14:11:03,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1597445167] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:03,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:03,034 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:11:03,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168479751] [2022-03-20 14:11:03,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:03,034 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:11:03,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:03,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:11:03,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:11:03,035 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 14:11:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:03,079 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2022-03-20 14:11:03,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:11:03,080 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 14:11:03,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:03,081 INFO L225 Difference]: With dead ends: 54 [2022-03-20 14:11:03,081 INFO L226 Difference]: Without dead ends: 52 [2022-03-20 14:11:03,082 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 14:11:03,083 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 14:11:03,083 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 14:11:03,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-20 14:11:03,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2022-03-20 14:11:03,095 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 14:11:03,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2022-03-20 14:11:03,096 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 22 [2022-03-20 14:11:03,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:03,097 INFO L478 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2022-03-20 14:11:03,097 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 14:11:03,097 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2022-03-20 14:11:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-03-20 14:11:03,098 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:03,098 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 14:11:03,124 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-20 14:11:03,322 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 14:11:03,323 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:03,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:03,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 1 times [2022-03-20 14:11:03,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:03,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1750806053] [2022-03-20 14:11:03,325 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:03,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 2 times [2022-03-20 14:11:03,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:03,325 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467705601] [2022-03-20 14:11:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:03,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:03,338 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:11:03,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [832312119] [2022-03-20 14:11:03,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:11:03,339 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:11:03,339 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:03,343 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 14:11:03,384 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 14:11:03,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:11:03,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:11:03,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-20 14:11:03,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:11:03,555 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 14:11:03,555 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:11:03,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:03,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467705601] [2022-03-20 14:11:03,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:11:03,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832312119] [2022-03-20 14:11:03,558 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832312119] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:03,558 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:03,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:11:03,560 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:03,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1750806053] [2022-03-20 14:11:03,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1750806053] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:03,560 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:03,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:11:03,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546684728] [2022-03-20 14:11:03,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:03,561 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:11:03,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:03,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:11:03,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:11:03,562 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 14:11:03,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:03,616 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2022-03-20 14:11:03,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:11:03,622 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 14:11:03,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:03,624 INFO L225 Difference]: With dead ends: 58 [2022-03-20 14:11:03,624 INFO L226 Difference]: Without dead ends: 56 [2022-03-20 14:11:03,624 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 14:11:03,625 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 14:11:03,626 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 14:11:03,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-03-20 14:11:03,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2022-03-20 14:11:03,638 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 14:11:03,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2022-03-20 14:11:03,640 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 27 [2022-03-20 14:11:03,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:03,640 INFO L478 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2022-03-20 14:11:03,640 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 14:11:03,640 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2022-03-20 14:11:03,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 14:11:03,641 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:03,641 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 14:11:03,663 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 14:11:03,858 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 14:11:03,859 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:03,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:03,859 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 1 times [2022-03-20 14:11:03,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:03,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [449501804] [2022-03-20 14:11:03,860 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 14:11:03,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 2 times [2022-03-20 14:11:03,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:11:03,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186756185] [2022-03-20 14:11:03,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:11:03,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:11:03,871 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:11:03,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658301080] [2022-03-20 14:11:03,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-20 14:11:03,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:11:03,875 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:11:03,877 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 14:11:03,878 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 14:11:03,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-20 14:11:03,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:11:03,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2022-03-20 14:11:03,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:11:04,031 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 14:11:04,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-20 14:11:04,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:11:04,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186756185] [2022-03-20 14:11:04,031 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:11:04,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658301080] [2022-03-20 14:11:04,033 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658301080] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:04,033 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:04,033 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:11:04,033 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:11:04,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [449501804] [2022-03-20 14:11:04,035 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [449501804] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:11:04,035 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:11:04,035 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-20 14:11:04,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759521204] [2022-03-20 14:11:04,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:11:04,036 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-20 14:11:04,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:04,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-20 14:11:04,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-20 14:11:04,037 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 14:11:04,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:11:04,109 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2022-03-20 14:11:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-20 14:11:04,110 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 14:11:04,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:11:04,111 INFO L225 Difference]: With dead ends: 66 [2022-03-20 14:11:04,111 INFO L226 Difference]: Without dead ends: 54 [2022-03-20 14:11:04,111 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 14:11:04,118 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 14:11:04,119 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 14:11:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-20 14:11:04,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2022-03-20 14:11:04,141 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 14:11:04,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2022-03-20 14:11:04,147 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 32 [2022-03-20 14:11:04,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:11:04,147 INFO L478 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2022-03-20 14:11:04,148 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 14:11:04,148 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2022-03-20 14:11:04,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-03-20 14:11:04,150 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:11:04,150 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 14:11:04,176 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 14:11:04,363 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 14:11:04,364 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:11:04,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:11:04,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 1 times [2022-03-20 14:11:04,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:11:04,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [7469139] [2022-03-20 14:13:37,514 WARN L232 SmtUtils]: Spent 2.55m on a formula simplification. DAG size of input: 192 DAG size of output: 187 (called from [L 564] de.uni_freiburg.informatik.ultimate.icfgtransformer.loopacceleration.jordan.JordanLoopAcceleration.buildAccelerationFormula) [2022-03-20 14:13:37,525 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 14:13:37,528 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:13:37,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1018400594, now seen corresponding path program 1 times [2022-03-20 14:13:37,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:13:37,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704287380] [2022-03-20 14:13:37,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:13:37,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:13:37,546 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:13:37,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889621886] [2022-03-20 14:13:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:13:37,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:13:37,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:13:37,551 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 14:13:37,595 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 14:13:37,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:13:37,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-20 14:13:37,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:13:42,908 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 14:13:42,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:14:52,541 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 14:14:52,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:14:52,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704287380] [2022-03-20 14:14:52,542 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:14:52,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889621886] [2022-03-20 14:14:52,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1889621886] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:14:52,542 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:14:52,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2022-03-20 14:16:31,912 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:16:31,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [7469139] [2022-03-20 14:16:31,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [7469139] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:16:31,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:16:31,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 14:16:31,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713885199] [2022-03-20 14:16:31,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:16:31,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 14:16:31,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:16:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 14:16:31,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=969, Unknown=33, NotChecked=0, Total=1190 [2022-03-20 14:16:31,918 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 14:16:48,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:16:48,962 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2022-03-20 14:16:48,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-20 14:16:48,963 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 14:16:48,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:16:48,964 INFO L225 Difference]: With dead ends: 74 [2022-03-20 14:16:48,964 INFO L226 Difference]: Without dead ends: 72 [2022-03-20 14:16:48,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 42 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 115.4s TimeCoverageRelationStatistics Valid=230, Invalid=1217, Unknown=35, NotChecked=0, Total=1482 [2022-03-20 14:16:48,966 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 14:16:48,967 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 387 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 78 Invalid, 0 Unknown, 115 Unchecked, 0.6s Time] [2022-03-20 14:16:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-20 14:16:48,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-03-20 14:16:48,983 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 14:16:48,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2022-03-20 14:16:48,984 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 49 [2022-03-20 14:16:48,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:16:48,985 INFO L478 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2022-03-20 14:16:48,985 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 14:16:48,985 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2022-03-20 14:16:48,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 14:16:48,996 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:16:48,996 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 14:16:49,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-20 14:16:49,206 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 14:16:49,206 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:16:49,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:16:49,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 2 times [2022-03-20 14:16:49,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:16:49,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [513176675] [2022-03-20 14:18:18,443 WARN L232 SmtUtils]: Spent 1.48m 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 14:18:18,447 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 14:18:18,448 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:18:18,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1063970467, now seen corresponding path program 1 times [2022-03-20 14:18:18,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:18:18,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313565187] [2022-03-20 14:18:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:18:18,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:18:18,467 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:18:18,467 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879004056] [2022-03-20 14:18:18,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:18:18,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:18:18,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:18:18,472 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 14:18:18,474 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 14:18:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 14:18:18,901 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-03-20 14:18:19,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-03-20 14:18:19,245 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-03-20 14:18:19,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 3 times [2022-03-20 14:18:19,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:18:19,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727827794] [2022-03-20 14:18:19,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:18:19,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:18:19,254 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:18:19,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694298700] [2022-03-20 14:18:19,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-20 14:18:19,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:18:19,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:18:19,263 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 14:18:19,303 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 14:18:19,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-20 14:18:19,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-20 14:18:19,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2022-03-20 14:18:19,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:18:19,972 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 14:18:19,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:18:20,371 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 14:18:20,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:18:20,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727827794] [2022-03-20 14:18:20,371 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:18:20,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694298700] [2022-03-20 14:18:20,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694298700] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:18:20,372 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:18:20,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-03-20 14:18:20,372 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:18:20,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [513176675] [2022-03-20 14:18:20,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [513176675] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:18:20,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:18:20,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 14:18:20,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554551200] [2022-03-20 14:18:20,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:18:20,373 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 14:18:20,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:18:20,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 14:18:20,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-03-20 14:18:20,374 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 14:18:20,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:18:20,912 INFO L93 Difference]: Finished difference Result 91 states and 110 transitions. [2022-03-20 14:18:20,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-20 14:18:20,913 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 14:18:20,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:18:20,914 INFO L225 Difference]: With dead ends: 91 [2022-03-20 14:18:20,914 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 14:18:20,914 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-03-20 14:18:20,915 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 14:18:20,915 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 14:18:20,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 14:18:20,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2022-03-20 14:18:20,935 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 14:18:20,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2022-03-20 14:18:20,936 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 54 [2022-03-20 14:18:20,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:18:20,936 INFO L478 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2022-03-20 14:18:20,936 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 14:18:20,936 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2022-03-20 14:18:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-03-20 14:18:20,937 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:18:20,937 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 14:18:20,946 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 14:18:21,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-03-20 14:18:21,346 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 14:18:21,347 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:18:21,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:18:21,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1546120389, now seen corresponding path program 4 times [2022-03-20 14:18:21,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:18:21,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1067292701] [2022-03-20 14:19:38,743 WARN L232 SmtUtils]: Spent 1.29m 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 14:19:38,746 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 14:19:38,747 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:19:38,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1624834318, now seen corresponding path program 1 times [2022-03-20 14:19:38,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:19:38,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702032789] [2022-03-20 14:19:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:19:38,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:19:38,767 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:19:38,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1256293276] [2022-03-20 14:19:38,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:19:38,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:19:38,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:19:38,774 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 14:19:38,775 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 14:19:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:19:39,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 27 conjunts are in the unsatisfiable core [2022-03-20 14:19:39,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:19:48,447 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 14:19:48,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:19:51,271 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 14:19:51,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:19:51,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702032789] [2022-03-20 14:19:51,272 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:19:51,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256293276] [2022-03-20 14:19:51,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256293276] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:19:51,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:19:51,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2022-03-20 14:21:25,840 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 14:21:25,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1067292701] [2022-03-20 14:21:25,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1067292701] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 14:21:25,841 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 14:21:25,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 14:21:25,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048152217] [2022-03-20 14:21:25,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 14:21:25,841 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 14:21:25,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 14:21:25,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 14:21:25,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1034, Unknown=29, NotChecked=0, Total=1260 [2022-03-20 14:21:25,843 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 14:21:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 14:21:44,088 INFO L93 Difference]: Finished difference Result 94 states and 103 transitions. [2022-03-20 14:21:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 14:21:44,088 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 14:21:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 14:21:44,091 INFO L225 Difference]: With dead ends: 94 [2022-03-20 14:21:44,091 INFO L226 Difference]: Without dead ends: 92 [2022-03-20 14:21:44,092 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 59 SyntacticMatches, 8 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 116.1s TimeCoverageRelationStatistics Valid=264, Invalid=1427, Unknown=31, NotChecked=0, Total=1722 [2022-03-20 14:21:44,092 INFO L913 BasicCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 396 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 14:21:44,093 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 428 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 75 Invalid, 0 Unknown, 157 Unchecked, 0.8s Time] [2022-03-20 14:21:44,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-20 14:21:44,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2022-03-20 14:21:44,124 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 14:21:44,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 100 transitions. [2022-03-20 14:21:44,124 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 100 transitions. Word has length 59 [2022-03-20 14:21:44,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 14:21:44,125 INFO L478 AbstractCegarLoop]: Abstraction has 92 states and 100 transitions. [2022-03-20 14:21:44,125 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 14:21:44,125 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 100 transitions. [2022-03-20 14:21:44,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 14:21:44,126 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 14:21:44,126 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 14:21:44,134 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 14:21:44,333 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 14:21:44,334 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 14:21:44,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 14:21:44,334 INFO L85 PathProgramCache]: Analyzing trace with hash -389057674, now seen corresponding path program 5 times [2022-03-20 14:21:44,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 14:21:44,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1220966713] [2022-03-20 14:24:39,568 WARN L232 SmtUtils]: Spent 2.92m 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 14:24:39,570 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 14:24:39,571 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 14:24:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash 746353091, now seen corresponding path program 1 times [2022-03-20 14:24:39,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 14:24:39,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359688006] [2022-03-20 14:24:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:24:39,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 14:24:39,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-20 14:24:39,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1359202810] [2022-03-20 14:24:39,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 14:24:39,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-20 14:24:39,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 14:24:39,587 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 14:24:39,587 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 14:24:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 14:24:39,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-20 14:24:39,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-20 14:25:09,389 WARN L232 SmtUtils]: Spent 5.58s on a formula simplification. DAG size of input: 78 DAG size of output: 77 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-20 14:25:14,266 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-20 14:25:14,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-20 14:25:34,983 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-03-20 14:25:34,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 14:25:34,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359688006] [2022-03-20 14:25:34,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-20 14:25:34,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359202810] [2022-03-20 14:25:34,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359202810] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-20 14:25:34,984 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-20 14:25:34,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14