/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/hard-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-5d317bd [2022-03-19 05:00:59,346 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-19 05:00:59,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-19 05:00:59,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-19 05:00:59,455 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-19 05:00:59,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-19 05:00:59,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-19 05:00:59,460 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-03-19 05:00:59,471 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-19 05:00:59,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-19 05:00:59,472 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-19 05:00:59,472 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-19 05:00:59,472 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-19 05:00:59,473 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-19 05:00:59,473 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-19 05:00:59,473 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-19 05:00:59,473 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-19 05:00:59,474 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-19 05:00:59,474 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-19 05:00:59,474 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-19 05:00:59,474 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-19 05:00:59,474 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-19 05:00:59,474 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-19 05:00:59,475 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-19 05:00:59,475 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-19 05:00:59,475 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-19 05:00:59,475 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 05:00:59,475 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-19 05:00:59,475 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-19 05:00:59,475 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-19 05:00:59,476 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-19 05:00:59,476 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-19 05:00:59,476 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-03-19 05:00:59,476 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-19 05:00:59,670 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-19 05:00:59,705 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-19 05:00:59,708 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-19 05:00:59,709 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-19 05:00:59,711 INFO L275 PluginConnector]: CDTParser initialized [2022-03-19 05:00:59,712 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2022-03-19 05:00:59,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/005a432c6/ae9689e632a347bb852fba9f0ad99947/FLAGfe1797123 [2022-03-19 05:01:00,133 INFO L306 CDTParser]: Found 1 translation units. [2022-03-19 05:01:00,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/hard-ll_valuebound20.c [2022-03-19 05:01:00,141 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/005a432c6/ae9689e632a347bb852fba9f0ad99947/FLAGfe1797123 [2022-03-19 05:01:00,167 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/005a432c6/ae9689e632a347bb852fba9f0ad99947 [2022-03-19 05:01:00,169 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-19 05:01:00,170 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-19 05:01:00,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-19 05:01:00,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-19 05:01:00,173 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-19 05:01:00,174 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 05:01:00" (1/1) ... [2022-03-19 05:01:00,175 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f26ccad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00, skipping insertion in model container [2022-03-19 05:01:00,175 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.03 05:01:00" (1/1) ... [2022-03-19 05:01:00,179 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-19 05:01:00,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-19 05:01:00,363 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/hard-ll_valuebound20.c[538,551] [2022-03-19 05:01:00,388 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 05:01:00,395 INFO L203 MainTranslator]: Completed pre-run [2022-03-19 05:01:00,410 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/hard-ll_valuebound20.c[538,551] [2022-03-19 05:01:00,417 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-19 05:01:00,428 INFO L208 MainTranslator]: Completed translation [2022-03-19 05:01:00,429 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00 WrapperNode [2022-03-19 05:01:00,429 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-19 05:01:00,430 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-19 05:01:00,430 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-19 05:01:00,430 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-19 05:01:00,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00" (1/1) ... [2022-03-19 05:01:00,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00" (1/1) ... [2022-03-19 05:01:00,448 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00" (1/1) ... [2022-03-19 05:01:00,448 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00" (1/1) ... [2022-03-19 05:01:00,452 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00" (1/1) ... [2022-03-19 05:01:00,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00" (1/1) ... [2022-03-19 05:01:00,463 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00" (1/1) ... [2022-03-19 05:01:00,465 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-19 05:01:00,465 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-19 05:01:00,465 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-19 05:01:00,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-19 05:01:00,466 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00" (1/1) ... [2022-03-19 05:01:00,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-19 05:01:00,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:00,495 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) [2022-03-19 05:01:00,499 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 [2022-03-19 05:01:00,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-19 05:01:00,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-19 05:01:00,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-19 05:01:00,527 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-03-19 05:01:00,527 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-19 05:01:00,527 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-19 05:01:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-19 05:01:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-19 05:01:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-19 05:01:00,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-19 05:01:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-03-19 05:01:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-03-19 05:01:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-19 05:01:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-19 05:01:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-19 05:01:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-19 05:01:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-19 05:01:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-19 05:01:00,528 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-19 05:01:00,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-19 05:01:00,589 INFO L234 CfgBuilder]: Building ICFG [2022-03-19 05:01:00,591 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-19 05:01:00,746 INFO L275 CfgBuilder]: Performing block encoding [2022-03-19 05:01:00,752 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-19 05:01:00,752 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-19 05:01:00,753 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 05:01:00 BoogieIcfgContainer [2022-03-19 05:01:00,753 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-19 05:01:00,755 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-19 05:01:00,755 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-19 05:01:00,758 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-19 05:01:00,758 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.03 05:01:00" (1/3) ... [2022-03-19 05:01:00,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7f89d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 05:01:00, skipping insertion in model container [2022-03-19 05:01:00,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.03 05:01:00" (2/3) ... [2022-03-19 05:01:00,759 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c7f89d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.03 05:01:00, skipping insertion in model container [2022-03-19 05:01:00,759 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.03 05:01:00" (3/3) ... [2022-03-19 05:01:00,760 INFO L111 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound20.c [2022-03-19 05:01:00,764 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-19 05:01:00,765 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-19 05:01:00,814 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-19 05:01:00,820 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 [2022-03-19 05:01:00,820 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-19 05:01:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-03-19 05:01:00,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 05:01:00,840 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:00,840 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:00,841 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:00,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:00,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 1 times [2022-03-19 05:01:00,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:00,853 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [890209707] [2022-03-19 05:01:00,863 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1784424332, now seen corresponding path program 2 times [2022-03-19 05:01:00,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:00,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573769478] [2022-03-19 05:01:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:00,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:00,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:01:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:01:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 05:01:01,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 05:01:01,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 05:01:01,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:01,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573769478] [2022-03-19 05:01:01,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573769478] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:01,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:01,068 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 05:01:01,069 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:01,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [890209707] [2022-03-19 05:01:01,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [890209707] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:01,070 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:01,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-03-19 05:01:01,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036924358] [2022-03-19 05:01:01,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:01,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-03-19 05:01:01,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:01,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-03-19 05:01:01,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 05:01:01,097 INFO L87 Difference]: Start difference. First operand has 38 states, 20 states have (on average 1.5) internal successors, (30), 21 states have internal predecessors, (30), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 05:01:01,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:01,200 INFO L93 Difference]: Finished difference Result 69 states and 110 transitions. [2022-03-19 05:01:01,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-03-19 05:01:01,203 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 28 [2022-03-19 05:01:01,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:01,208 INFO L225 Difference]: With dead ends: 69 [2022-03-19 05:01:01,208 INFO L226 Difference]: Without dead ends: 33 [2022-03-19 05:01:01,210 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-03-19 05:01:01,212 INFO L912 BasicCegarLoop]: 38 mSDtfsCounter, 21 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:01,213 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 41 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:01:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-19 05:01:01,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-19 05:01:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 05:01:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-03-19 05:01:01,254 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 28 [2022-03-19 05:01:01,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:01,255 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-03-19 05:01:01,255 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-03-19 05:01:01,255 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-03-19 05:01:01,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-19 05:01:01,256 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:01,256 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:01,256 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-19 05:01:01,257 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:01,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:01,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 1 times [2022-03-19 05:01:01,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:01,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1934891110] [2022-03-19 05:01:01,258 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:01,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1361835634, now seen corresponding path program 2 times [2022-03-19 05:01:01,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:01,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110496986] [2022-03-19 05:01:01,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:01,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:01,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:01:01,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:01:01,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 05:01:01,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 05:01:01,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,377 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 05:01:01,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:01,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110496986] [2022-03-19 05:01:01,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1110496986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:01,378 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:01,378 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:01:01,378 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:01,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1934891110] [2022-03-19 05:01:01,379 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1934891110] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:01,379 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:01,379 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:01:01,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698596197] [2022-03-19 05:01:01,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:01,381 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:01:01,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:01,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:01:01,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:01:01,382 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 05:01:01,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:01,576 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2022-03-19 05:01:01,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:01:01,577 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 28 [2022-03-19 05:01:01,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:01,579 INFO L225 Difference]: With dead ends: 46 [2022-03-19 05:01:01,579 INFO L226 Difference]: Without dead ends: 44 [2022-03-19 05:01:01,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:01:01,584 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 38 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:01,584 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 48 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:01:01,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-19 05:01:01,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2022-03-19 05:01:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 05:01:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-03-19 05:01:01,605 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 28 [2022-03-19 05:01:01,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:01,605 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-03-19 05:01:01,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-03-19 05:01:01,606 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-03-19 05:01:01,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-03-19 05:01:01,606 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:01,607 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:01,607 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-19 05:01:01,608 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:01,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 1 times [2022-03-19 05:01:01,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:01,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1539217355] [2022-03-19 05:01:01,609 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:01,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1382067636, now seen corresponding path program 2 times [2022-03-19 05:01:01,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:01,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187414835] [2022-03-19 05:01:01,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:01,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:01,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-19 05:01:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-03-19 05:01:01,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-03-19 05:01:01,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-03-19 05:01:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-03-19 05:01:01,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-19 05:01:01,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-03-19 05:01:01,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:01,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187414835] [2022-03-19 05:01:01,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187414835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:01,741 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:01,741 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:01:01,742 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:01,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1539217355] [2022-03-19 05:01:01,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1539217355] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:01,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:01,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:01:01,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955526127] [2022-03-19 05:01:01,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:01,743 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:01:01,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:01,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:01:01,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:01:01,743 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:01:01,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:01,876 INFO L93 Difference]: Finished difference Result 50 states and 63 transitions. [2022-03-19 05:01:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-19 05:01:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 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 33 [2022-03-19 05:01:01,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:01,877 INFO L225 Difference]: With dead ends: 50 [2022-03-19 05:01:01,877 INFO L226 Difference]: Without dead ends: 48 [2022-03-19 05:01:01,878 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:01:01,878 INFO L912 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:01,879 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:01:01,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-03-19 05:01:01,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 41. [2022-03-19 05:01:01,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-03-19 05:01:01,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2022-03-19 05:01:01,900 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 33 [2022-03-19 05:01:01,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:01,901 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2022-03-19 05:01:01,901 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-03-19 05:01:01,901 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2022-03-19 05:01:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-19 05:01:01,902 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:01,902 INFO L500 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:01,902 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-19 05:01:01,903 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:01,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 1 times [2022-03-19 05:01:01,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:01,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1873670667] [2022-03-19 05:01:01,904 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:01,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1455208590, now seen corresponding path program 2 times [2022-03-19 05:01:01,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:01,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77344040] [2022-03-19 05:01:01,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:01,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:01,918 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:01,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426745556] [2022-03-19 05:01:01,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:01:01,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:01,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:01,926 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) [2022-03-19 05:01:01,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-19 05:01:01,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:01:01,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:01,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 05:01:01,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:02,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-03-19 05:01:02,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:01:02,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:02,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77344040] [2022-03-19 05:01:02,171 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:02,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426745556] [2022-03-19 05:01:02,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426745556] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:02,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:02,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:01:02,172 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:02,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1873670667] [2022-03-19 05:01:02,174 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1873670667] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:02,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:02,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:01:02,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556004553] [2022-03-19 05:01:02,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:02,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:01:02,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:02,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:01:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:01:02,176 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 05:01:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:02,254 INFO L93 Difference]: Finished difference Result 69 states and 89 transitions. [2022-03-19 05:01:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:01:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-03-19 05:01:02,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:02,257 INFO L225 Difference]: With dead ends: 69 [2022-03-19 05:01:02,257 INFO L226 Difference]: Without dead ends: 55 [2022-03-19 05:01:02,257 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:01:02,264 INFO L912 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:02,265 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 157 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:01:02,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-19 05:01:02,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-19 05:01:02,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 32 states have internal predecessors, (35), 18 states have call successors, (18), 7 states have call predecessors, (18), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-03-19 05:01:02,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 68 transitions. [2022-03-19 05:01:02,282 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 68 transitions. Word has length 38 [2022-03-19 05:01:02,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:02,282 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 68 transitions. [2022-03-19 05:01:02,282 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-03-19 05:01:02,282 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 68 transitions. [2022-03-19 05:01:02,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-03-19 05:01:02,283 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:02,283 INFO L500 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:02,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-03-19 05:01:02,506 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:02,506 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:02,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 1 times [2022-03-19 05:01:02,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:02,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [539381121] [2022-03-19 05:01:02,508 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:02,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1688067263, now seen corresponding path program 2 times [2022-03-19 05:01:02,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:02,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263000689] [2022-03-19 05:01:02,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:02,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:02,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:02,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136068862] [2022-03-19 05:01:02,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:01:02,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:02,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:02,538 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) [2022-03-19 05:01:02,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-19 05:01:02,593 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:01:02,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:02,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-19 05:01:02,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-03-19 05:01:02,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:03,027 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-03-19 05:01:03,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:03,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263000689] [2022-03-19 05:01:03,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:03,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136068862] [2022-03-19 05:01:03,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136068862] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 05:01:03,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:01:03,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 11 [2022-03-19 05:01:03,029 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:03,029 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [539381121] [2022-03-19 05:01:03,029 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [539381121] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:03,029 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:03,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:01:03,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549588892] [2022-03-19 05:01:03,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:03,029 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:01:03,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:03,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:01:03,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-03-19 05:01:03,030 INFO L87 Difference]: Start difference. First operand 55 states and 68 transitions. Second operand has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 05:01:03,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:03,070 INFO L93 Difference]: Finished difference Result 68 states and 85 transitions. [2022-03-19 05:01:03,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:01:03,071 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2022-03-19 05:01:03,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:03,072 INFO L225 Difference]: With dead ends: 68 [2022-03-19 05:01:03,072 INFO L226 Difference]: Without dead ends: 66 [2022-03-19 05:01:03,072 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-19 05:01:03,072 INFO L912 BasicCegarLoop]: 42 mSDtfsCounter, 12 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:03,073 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 178 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:01:03,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-03-19 05:01:03,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2022-03-19 05:01:03,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 36 states have (on average 1.1944444444444444) internal successors, (43), 38 states have internal predecessors, (43), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-03-19 05:01:03,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-03-19 05:01:03,082 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 45 [2022-03-19 05:01:03,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:03,082 INFO L478 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-03-19 05:01:03,082 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 5 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 05:01:03,082 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-03-19 05:01:03,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-03-19 05:01:03,083 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:03,083 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:03,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:03,300 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:03,300 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:03,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:03,301 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 1 times [2022-03-19 05:01:03,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:03,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [761097362] [2022-03-19 05:01:03,302 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:03,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734606, now seen corresponding path program 2 times [2022-03-19 05:01:03,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:03,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623330236] [2022-03-19 05:01:03,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:03,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:03,313 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:03,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828857253] [2022-03-19 05:01:03,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:01:03,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:03,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:03,321 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) [2022-03-19 05:01:03,325 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-19 05:01:03,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:01:03,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:03,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-19 05:01:03,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:03,607 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 16 proven. 4 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-03-19 05:01:03,608 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:03,748 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-03-19 05:01:03,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:03,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623330236] [2022-03-19 05:01:03,749 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:03,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828857253] [2022-03-19 05:01:03,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828857253] provided 1 perfect and 1 imperfect interpolant sequences [2022-03-19 05:01:03,749 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:01:03,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 10 [2022-03-19 05:01:03,750 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:03,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [761097362] [2022-03-19 05:01:03,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [761097362] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:03,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:03,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:01:03,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46725888] [2022-03-19 05:01:03,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:03,750 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:01:03,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:03,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:01:03,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2022-03-19 05:01:03,751 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 05:01:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:03,798 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-03-19 05:01:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:01:03,798 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 55 [2022-03-19 05:01:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:03,799 INFO L225 Difference]: With dead ends: 76 [2022-03-19 05:01:03,799 INFO L226 Difference]: Without dead ends: 74 [2022-03-19 05:01:03,799 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-19 05:01:03,800 INFO L912 BasicCegarLoop]: 41 mSDtfsCounter, 8 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:03,800 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 141 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:01:03,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-03-19 05:01:03,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2022-03-19 05:01:03,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 40 states have (on average 1.175) internal successors, (47), 43 states have internal predecessors, (47), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (19), 18 states have call predecessors, (19), 19 states have call successors, (19) [2022-03-19 05:01:03,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-03-19 05:01:03,811 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 55 [2022-03-19 05:01:03,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:03,811 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-03-19 05:01:03,811 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-03-19 05:01:03,811 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-03-19 05:01:03,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-19 05:01:03,812 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:03,812 INFO L500 BasicCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:03,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:04,029 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:04,030 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 1 times [2022-03-19 05:01:04,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:04,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1065786440] [2022-03-19 05:01:04,031 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:04,031 INFO L85 PathProgramCache]: Analyzing trace with hash -682689219, now seen corresponding path program 2 times [2022-03-19 05:01:04,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:04,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150273140] [2022-03-19 05:01:04,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:04,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:04,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:04,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [534554908] [2022-03-19 05:01:04,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:01:04,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:04,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:04,044 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) [2022-03-19 05:01:04,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-19 05:01:04,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:01:04,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:04,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjunts are in the unsatisfiable core [2022-03-19 05:01:04,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:04,221 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-03-19 05:01:04,221 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-03-19 05:01:04,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:04,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150273140] [2022-03-19 05:01:04,222 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:04,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534554908] [2022-03-19 05:01:04,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534554908] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:04,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:04,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:01:04,222 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:04,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1065786440] [2022-03-19 05:01:04,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1065786440] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:04,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:04,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-19 05:01:04,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039768607] [2022-03-19 05:01:04,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:04,223 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-19 05:01:04,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:04,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-19 05:01:04,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-19 05:01:04,223 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 05:01:04,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:04,270 INFO L93 Difference]: Finished difference Result 79 states and 96 transitions. [2022-03-19 05:01:04,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-19 05:01:04,271 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2022-03-19 05:01:04,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:04,273 INFO L225 Difference]: With dead ends: 79 [2022-03-19 05:01:04,273 INFO L226 Difference]: Without dead ends: 72 [2022-03-19 05:01:04,273 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:01:04,273 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:04,274 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 132 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-19 05:01:04,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-03-19 05:01:04,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2022-03-19 05:01:04,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 20 states have call successors, (20), 10 states have call predecessors, (20), 9 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2022-03-19 05:01:04,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-03-19 05:01:04,287 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 56 [2022-03-19 05:01:04,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:04,287 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-03-19 05:01:04,287 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2022-03-19 05:01:04,287 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-03-19 05:01:04,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-03-19 05:01:04,288 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:04,288 INFO L500 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:04,315 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:04,503 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:04,503 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:04,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:04,504 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 1 times [2022-03-19 05:01:04,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:04,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1707905584] [2022-03-19 05:01:04,504 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:04,505 INFO L85 PathProgramCache]: Analyzing trace with hash 680531353, now seen corresponding path program 2 times [2022-03-19 05:01:04,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:04,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680487709] [2022-03-19 05:01:04,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:04,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:04,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:04,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009044390] [2022-03-19 05:01:04,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:01:04,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:04,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:04,575 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) [2022-03-19 05:01:04,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-19 05:01:04,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:01:04,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:04,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 25 conjunts are in the unsatisfiable core [2022-03-19 05:01:04,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:05,249 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-19 05:01:05,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:06,413 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-03-19 05:01:06,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:06,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680487709] [2022-03-19 05:01:06,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:06,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009044390] [2022-03-19 05:01:06,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009044390] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:01:06,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:01:06,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 05:01:06,416 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:06,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1707905584] [2022-03-19 05:01:06,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1707905584] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:06,416 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:06,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 05:01:06,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690802044] [2022-03-19 05:01:06,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:06,417 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 05:01:06,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:06,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 05:01:06,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-19 05:01:06,418 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 05:01:06,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:06,574 INFO L93 Difference]: Finished difference Result 135 states and 165 transitions. [2022-03-19 05:01:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 05:01:06,575 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2022-03-19 05:01:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:06,579 INFO L225 Difference]: With dead ends: 135 [2022-03-19 05:01:06,579 INFO L226 Difference]: Without dead ends: 108 [2022-03-19 05:01:06,580 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2022-03-19 05:01:06,581 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 10 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:06,581 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 326 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:01:06,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-19 05:01:06,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 106. [2022-03-19 05:01:06,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 64 states have (on average 1.140625) internal successors, (73), 67 states have internal predecessors, (73), 27 states have call successors, (27), 15 states have call predecessors, (27), 14 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 05:01:06,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 125 transitions. [2022-03-19 05:01:06,604 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 125 transitions. Word has length 75 [2022-03-19 05:01:06,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:06,605 INFO L478 AbstractCegarLoop]: Abstraction has 106 states and 125 transitions. [2022-03-19 05:01:06,605 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 05:01:06,605 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 125 transitions. [2022-03-19 05:01:06,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-19 05:01:06,608 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:06,609 INFO L500 BasicCegarLoop]: trace histogram [10, 9, 9, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:06,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:06,811 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:06,812 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:06,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:06,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 3 times [2022-03-19 05:01:06,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:06,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1510757683] [2022-03-19 05:01:06,813 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:06,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1566820819, now seen corresponding path program 4 times [2022-03-19 05:01:06,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:06,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948655836] [2022-03-19 05:01:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:06,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:06,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:06,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271395204] [2022-03-19 05:01:06,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:01:06,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:06,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:06,824 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) [2022-03-19 05:01:06,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-19 05:01:06,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:01:06,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:06,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-19 05:01:06,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:07,142 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 05:01:07,143 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:09,180 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2022-03-19 05:01:09,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:09,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948655836] [2022-03-19 05:01:09,181 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:09,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271395204] [2022-03-19 05:01:09,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271395204] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:01:09,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:01:09,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2022-03-19 05:01:09,181 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:09,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1510757683] [2022-03-19 05:01:09,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1510757683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:09,181 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:09,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-19 05:01:09,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122022756] [2022-03-19 05:01:09,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:09,182 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-03-19 05:01:09,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:09,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-03-19 05:01:09,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-03-19 05:01:09,183 INFO L87 Difference]: Start difference. First operand 106 states and 125 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 05:01:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:09,334 INFO L93 Difference]: Finished difference Result 133 states and 159 transitions. [2022-03-19 05:01:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-03-19 05:01:09,334 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 80 [2022-03-19 05:01:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:09,335 INFO L225 Difference]: With dead ends: 133 [2022-03-19 05:01:09,335 INFO L226 Difference]: Without dead ends: 110 [2022-03-19 05:01:09,335 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2022-03-19 05:01:09,336 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:09,336 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 265 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:01:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-03-19 05:01:09,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-03-19 05:01:09,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 66 states have (on average 1.106060606060606) internal successors, (73), 70 states have internal predecessors, (73), 28 states have call successors, (28), 16 states have call predecessors, (28), 15 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-03-19 05:01:09,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 126 transitions. [2022-03-19 05:01:09,349 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 126 transitions. Word has length 80 [2022-03-19 05:01:09,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:09,349 INFO L478 AbstractCegarLoop]: Abstraction has 110 states and 126 transitions. [2022-03-19 05:01:09,349 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2022-03-19 05:01:09,350 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 126 transitions. [2022-03-19 05:01:09,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-19 05:01:09,350 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:09,350 INFO L500 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:09,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:09,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:09,588 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:09,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:09,588 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 1 times [2022-03-19 05:01:09,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:09,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [183508299] [2022-03-19 05:01:09,589 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:09,589 INFO L85 PathProgramCache]: Analyzing trace with hash -815356955, now seen corresponding path program 2 times [2022-03-19 05:01:09,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:09,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544204171] [2022-03-19 05:01:09,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:09,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:09,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:09,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1999364662] [2022-03-19 05:01:09,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:01:09,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:09,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:09,615 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) [2022-03-19 05:01:09,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-19 05:01:09,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:01:09,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 31 conjunts are in the unsatisfiable core [2022-03-19 05:01:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:10,923 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 05:01:10,924 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:01:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 45 proven. 32 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-03-19 05:01:26,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:01:26,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544204171] [2022-03-19 05:01:26,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:01:26,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999364662] [2022-03-19 05:01:26,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999364662] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:01:26,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:01:26,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 23 [2022-03-19 05:01:26,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:01:26,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [183508299] [2022-03-19 05:01:26,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [183508299] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:01:26,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:01:26,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-03-19 05:01:26,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202536910] [2022-03-19 05:01:26,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:01:26,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-19 05:01:26,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:26,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-19 05:01:26,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2022-03-19 05:01:26,558 INFO L87 Difference]: Start difference. First operand 110 states and 126 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 05:01:27,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:01:27,573 INFO L93 Difference]: Finished difference Result 116 states and 131 transitions. [2022-03-19 05:01:27,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-19 05:01:27,574 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) Word has length 86 [2022-03-19 05:01:27,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:01:27,575 INFO L225 Difference]: With dead ends: 116 [2022-03-19 05:01:27,575 INFO L226 Difference]: Without dead ends: 88 [2022-03-19 05:01:27,575 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2022-03-19 05:01:27,576 INFO L912 BasicCegarLoop]: 36 mSDtfsCounter, 17 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-19 05:01:27,576 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 342 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-19 05:01:27,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-19 05:01:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-03-19 05:01:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 55 states have internal predecessors, (58), 23 states have call successors, (23), 13 states have call predecessors, (23), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-03-19 05:01:27,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 102 transitions. [2022-03-19 05:01:27,583 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 102 transitions. Word has length 86 [2022-03-19 05:01:27,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:01:27,584 INFO L478 AbstractCegarLoop]: Abstraction has 88 states and 102 transitions. [2022-03-19 05:01:27,584 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 6 states have call predecessors, (14), 6 states have call successors, (14) [2022-03-19 05:01:27,584 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 102 transitions. [2022-03-19 05:01:27,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-19 05:01:27,584 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:01:27,584 INFO L500 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:01:27,609 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-19 05:01:27,801 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:27,801 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:01:27,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:01:27,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 5 times [2022-03-19 05:01:27,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:01:27,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [448643244] [2022-03-19 05:01:27,802 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:01:27,803 INFO L85 PathProgramCache]: Analyzing trace with hash 1885636697, now seen corresponding path program 6 times [2022-03-19 05:01:27,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:01:27,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795550686] [2022-03-19 05:01:27,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:01:27,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:01:27,809 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:01:27,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1517841139] [2022-03-19 05:01:27,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:01:27,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:01:27,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:01:27,823 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) [2022-03-19 05:01:27,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-19 05:01:27,863 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-19 05:01:27,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:01:27,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 26 conjunts are in the unsatisfiable core [2022-03-19 05:01:27,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:01:40,778 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 55 proven. 9 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 05:01:40,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:02:28,205 WARN L232 SmtUtils]: Spent 23.38s on a formula simplification that was a NOOP. DAG size: 51 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:03:31,860 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 45 proven. 19 refuted. 0 times theorem prover too weak. 207 trivial. 0 not checked. [2022-03-19 05:03:31,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:03:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795550686] [2022-03-19 05:03:31,861 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:03:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517841139] [2022-03-19 05:03:31,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517841139] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:03:31,861 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:03:31,861 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 15 [2022-03-19 05:03:31,861 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:03:31,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [448643244] [2022-03-19 05:03:31,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [448643244] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:03:31,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:03:31,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 05:03:31,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929726846] [2022-03-19 05:03:31,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:03:31,862 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 05:03:31,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:31,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 05:03:31,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=161, Unknown=3, NotChecked=0, Total=210 [2022-03-19 05:03:31,863 INFO L87 Difference]: Start difference. First operand 88 states and 102 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 05:03:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:03:36,337 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2022-03-19 05:03:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-19 05:03:36,337 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 92 [2022-03-19 05:03:36,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:03:36,338 INFO L225 Difference]: With dead ends: 112 [2022-03-19 05:03:36,338 INFO L226 Difference]: Without dead ends: 100 [2022-03-19 05:03:36,339 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 167 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 36.2s TimeCoverageRelationStatistics Valid=59, Invalid=209, Unknown=4, NotChecked=0, Total=272 [2022-03-19 05:03:36,339 INFO L912 BasicCegarLoop]: 35 mSDtfsCounter, 25 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-19 05:03:36,339 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 259 Invalid, 234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-19 05:03:36,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-19 05:03:36,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2022-03-19 05:03:36,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 59 states have (on average 1.11864406779661) internal successors, (66), 63 states have internal predecessors, (66), 26 states have call successors, (26), 14 states have call predecessors, (26), 13 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-03-19 05:03:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 116 transitions. [2022-03-19 05:03:36,350 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 116 transitions. Word has length 92 [2022-03-19 05:03:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:03:36,350 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 116 transitions. [2022-03-19 05:03:36,350 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-03-19 05:03:36,351 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 116 transitions. [2022-03-19 05:03:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-03-19 05:03:36,353 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:03:36,353 INFO L500 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:03:36,403 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-19 05:03:36,576 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-03-19 05:03:36,577 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:03:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:03:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 7 times [2022-03-19 05:03:36,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:36,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [324588948] [2022-03-19 05:03:36,578 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:03:36,578 INFO L85 PathProgramCache]: Analyzing trace with hash -278824083, now seen corresponding path program 8 times [2022-03-19 05:03:36,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:03:36,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442383986] [2022-03-19 05:03:36,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:03:36,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:03:36,586 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:03:36,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1254113418] [2022-03-19 05:03:36,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:03:36,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:03:36,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:03:36,598 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:03:36,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-19 05:03:36,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:03:36,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:03:36,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 23 conjunts are in the unsatisfiable core [2022-03-19 05:03:36,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:03:37,042 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 05:03:37,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:03:39,487 INFO L134 CoverageAnalysis]: Checked inductivity of 318 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-03-19 05:03:39,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:03:39,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442383986] [2022-03-19 05:03:39,488 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:03:39,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254113418] [2022-03-19 05:03:39,488 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254113418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:03:39,488 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:03:39,488 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2022-03-19 05:03:39,488 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:03:39,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [324588948] [2022-03-19 05:03:39,489 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [324588948] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:03:39,489 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:03:39,489 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-19 05:03:39,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584030666] [2022-03-19 05:03:39,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:03:39,489 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-19 05:03:39,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:39,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-19 05:03:39,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2022-03-19 05:03:39,490 INFO L87 Difference]: Start difference. First operand 99 states and 116 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 05:03:39,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:03:39,869 INFO L93 Difference]: Finished difference Result 177 states and 223 transitions. [2022-03-19 05:03:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-19 05:03:39,869 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-03-19 05:03:39,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:03:39,870 INFO L225 Difference]: With dead ends: 177 [2022-03-19 05:03:39,870 INFO L226 Difference]: Without dead ends: 138 [2022-03-19 05:03:39,871 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2022-03-19 05:03:39,871 INFO L912 BasicCegarLoop]: 62 mSDtfsCounter, 13 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:03:39,873 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 400 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-19 05:03:39,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-03-19 05:03:39,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-03-19 05:03:39,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 88 states have internal predecessors, (92), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (36), 32 states have call predecessors, (36), 36 states have call successors, (36) [2022-03-19 05:03:39,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 167 transitions. [2022-03-19 05:03:39,894 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 167 transitions. Word has length 97 [2022-03-19 05:03:39,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:03:39,895 INFO L478 AbstractCegarLoop]: Abstraction has 138 states and 167 transitions. [2022-03-19 05:03:39,895 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-03-19 05:03:39,895 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 167 transitions. [2022-03-19 05:03:39,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-03-19 05:03:39,897 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:03:39,897 INFO L500 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:03:39,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-19 05:03:40,116 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:03:40,117 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:03:40,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:03:40,117 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 9 times [2022-03-19 05:03:40,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:03:40,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1996793858] [2022-03-19 05:03:40,117 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:03:40,117 INFO L85 PathProgramCache]: Analyzing trace with hash -367001023, now seen corresponding path program 10 times [2022-03-19 05:03:40,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:03:40,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946658928] [2022-03-19 05:03:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:03:40,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:03:40,124 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:03:40,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [314940655] [2022-03-19 05:03:40,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:03:40,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:03:40,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:03:40,133 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:03:40,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-19 05:03:40,210 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:03:40,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:03:40,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 42 conjunts are in the unsatisfiable core [2022-03-19 05:03:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:03:41,408 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 05:03:41,408 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:04:33,820 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 58 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-03-19 05:04:33,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:04:33,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946658928] [2022-03-19 05:04:33,820 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:04:33,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314940655] [2022-03-19 05:04:33,820 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314940655] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:04:33,820 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:04:33,820 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 25 [2022-03-19 05:04:33,821 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:04:33,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1996793858] [2022-03-19 05:04:33,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1996793858] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:04:33,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:04:33,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 05:04:33,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920284643] [2022-03-19 05:04:33,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:04:33,821 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 05:04:33,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:33,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 05:04:33,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2022-03-19 05:04:33,822 INFO L87 Difference]: Start difference. First operand 138 states and 167 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 05:04:35,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:04:35,078 INFO L93 Difference]: Finished difference Result 184 states and 208 transitions. [2022-03-19 05:04:35,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 05:04:35,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 105 [2022-03-19 05:04:35,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:04:35,080 INFO L225 Difference]: With dead ends: 184 [2022-03-19 05:04:35,080 INFO L226 Difference]: Without dead ends: 147 [2022-03-19 05:04:35,080 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 185 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2022-03-19 05:04:35,081 INFO L912 BasicCegarLoop]: 47 mSDtfsCounter, 17 mSDsluCounter, 464 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-19 05:04:35,081 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 511 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-19 05:04:35,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-19 05:04:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-19 05:04:35,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 95 states have internal predecessors, (98), 36 states have call successors, (36), 21 states have call predecessors, (36), 20 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-03-19 05:04:35,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 167 transitions. [2022-03-19 05:04:35,096 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 167 transitions. Word has length 105 [2022-03-19 05:04:35,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:04:35,096 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 167 transitions. [2022-03-19 05:04:35,096 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 13 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 2 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2022-03-19 05:04:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 167 transitions. [2022-03-19 05:04:35,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-19 05:04:35,103 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:04:35,104 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:04:35,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-19 05:04:35,319 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-03-19 05:04:35,319 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:04:35,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:04:35,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 11 times [2022-03-19 05:04:35,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:35,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [705562782] [2022-03-19 05:04:35,320 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:04:35,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1683530195, now seen corresponding path program 12 times [2022-03-19 05:04:35,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:04:35,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620115896] [2022-03-19 05:04:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:04:35,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:04:35,341 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:04:35,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113447691] [2022-03-19 05:04:35,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:04:35,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:04:35,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:04:35,342 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:04:35,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-19 05:04:35,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-19 05:04:35,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:04:35,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-19 05:04:35,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:04:35,858 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 96 proven. 4 refuted. 0 times theorem prover too weak. 395 trivial. 0 not checked. [2022-03-19 05:04:35,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:04:36,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:04:36,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620115896] [2022-03-19 05:04:36,247 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:04:36,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113447691] [2022-03-19 05:04:36,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113447691] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 05:04:36,247 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:04:36,247 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-03-19 05:04:36,247 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:04:36,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [705562782] [2022-03-19 05:04:36,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [705562782] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:04:36,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:04:36,248 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-19 05:04:36,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320198429] [2022-03-19 05:04:36,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:04:36,248 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-19 05:04:36,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:36,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-19 05:04:36,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-03-19 05:04:36,249 INFO L87 Difference]: Start difference. First operand 147 states and 167 transitions. Second operand has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 05:04:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:04:36,732 INFO L93 Difference]: Finished difference Result 168 states and 190 transitions. [2022-03-19 05:04:36,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-19 05:04:36,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 114 [2022-03-19 05:04:36,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:04:36,733 INFO L225 Difference]: With dead ends: 168 [2022-03-19 05:04:36,733 INFO L226 Difference]: Without dead ends: 156 [2022-03-19 05:04:36,734 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-03-19 05:04:36,734 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 20 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 05:04:36,734 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 288 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 215 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-03-19 05:04:36,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-03-19 05:04:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2022-03-19 05:04:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 95 states have (on average 1.0842105263157895) internal successors, (103), 100 states have internal predecessors, (103), 38 states have call successors, (38), 22 states have call predecessors, (38), 21 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-03-19 05:04:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 176 transitions. [2022-03-19 05:04:36,754 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 176 transitions. Word has length 114 [2022-03-19 05:04:36,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:04:36,756 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 176 transitions. [2022-03-19 05:04:36,756 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.8) internal successors, (28), 9 states have internal predecessors, (28), 6 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-03-19 05:04:36,756 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 176 transitions. [2022-03-19 05:04:36,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-19 05:04:36,758 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:04:36,758 INFO L500 BasicCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:04:36,781 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-03-19 05:04:36,973 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-03-19 05:04:36,973 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:04:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:04:36,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 3 times [2022-03-19 05:04:36,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:36,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477859020] [2022-03-19 05:04:36,974 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:04:36,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1619018179, now seen corresponding path program 4 times [2022-03-19 05:04:36,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:04:36,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639776384] [2022-03-19 05:04:36,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:04:36,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:04:36,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:04:36,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1624652960] [2022-03-19 05:04:36,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:04:36,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:04:36,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:04:37,004 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:04:37,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-19 05:04:37,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:04:37,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:04:37,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 43 conjunts are in the unsatisfiable core [2022-03-19 05:04:37,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:04:37,825 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 05:04:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 71 proven. 29 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2022-03-19 05:04:37,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:04:38,036 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-03-19 05:04:51,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:04:51,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639776384] [2022-03-19 05:04:51,185 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:04:51,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624652960] [2022-03-19 05:04:51,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624652960] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-19 05:04:51,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-03-19 05:04:51,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-03-19 05:04:51,186 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:04:51,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477859020] [2022-03-19 05:04:51,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477859020] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:04:51,186 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:04:51,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 05:04:51,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706699147] [2022-03-19 05:04:51,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:04:51,187 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 05:04:51,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:51,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 05:04:51,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2022-03-19 05:04:51,188 INFO L87 Difference]: Start difference. First operand 155 states and 176 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 05:04:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:04:52,514 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2022-03-19 05:04:52,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-19 05:04:52,516 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) Word has length 116 [2022-03-19 05:04:52,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:04:52,517 INFO L225 Difference]: With dead ends: 161 [2022-03-19 05:04:52,517 INFO L226 Difference]: Without dead ends: 124 [2022-03-19 05:04:52,518 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 168 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=160, Invalid=596, Unknown=0, NotChecked=0, Total=756 [2022-03-19 05:04:52,518 INFO L912 BasicCegarLoop]: 43 mSDtfsCounter, 15 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-19 05:04:52,518 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 438 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-19 05:04:52,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-19 05:04:52,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2022-03-19 05:04:52,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 75 states have (on average 1.0933333333333333) internal successors, (82), 79 states have internal predecessors, (82), 31 states have call successors, (31), 18 states have call predecessors, (31), 17 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2022-03-19 05:04:52,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 142 transitions. [2022-03-19 05:04:52,540 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 142 transitions. Word has length 116 [2022-03-19 05:04:52,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:04:52,542 INFO L478 AbstractCegarLoop]: Abstraction has 124 states and 142 transitions. [2022-03-19 05:04:52,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 14 states have internal predecessors, (31), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 7 states have call successors, (19) [2022-03-19 05:04:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 142 transitions. [2022-03-19 05:04:52,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-19 05:04:52,543 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:04:52,543 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:04:52,561 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-19 05:04:52,755 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-19 05:04:52,756 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:04:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:04:52,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 5 times [2022-03-19 05:04:52,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:52,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1594832986] [2022-03-19 05:04:52,756 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:04:52,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1921791003, now seen corresponding path program 6 times [2022-03-19 05:04:52,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:04:52,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259193340] [2022-03-19 05:04:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:04:52,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:04:52,787 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:04:52,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [851459914] [2022-03-19 05:04:52,787 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:04:52,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:04:52,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:04:52,789 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:04:52,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-19 05:04:52,867 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-03-19 05:04:52,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:04:52,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-19 05:04:52,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:04:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 62 proven. 4 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2022-03-19 05:04:53,159 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:04:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 558 backedges. 57 proven. 4 refuted. 0 times theorem prover too weak. 497 trivial. 0 not checked. [2022-03-19 05:04:53,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:04:53,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259193340] [2022-03-19 05:04:53,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:04:53,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851459914] [2022-03-19 05:04:53,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851459914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:04:53,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:04:53,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2022-03-19 05:04:53,409 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:04:53,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1594832986] [2022-03-19 05:04:53,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1594832986] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:04:53,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:04:53,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-19 05:04:53,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938014892] [2022-03-19 05:04:53,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:04:53,410 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-19 05:04:53,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:53,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-19 05:04:53,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:04:53,410 INFO L87 Difference]: Start difference. First operand 124 states and 142 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-19 05:04:53,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:04:53,524 INFO L93 Difference]: Finished difference Result 150 states and 178 transitions. [2022-03-19 05:04:53,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-19 05:04:53,525 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) Word has length 120 [2022-03-19 05:04:53,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:04:53,533 INFO L225 Difference]: With dead ends: 150 [2022-03-19 05:04:53,533 INFO L226 Difference]: Without dead ends: 137 [2022-03-19 05:04:53,534 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 230 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2022-03-19 05:04:53,537 INFO L912 BasicCegarLoop]: 66 mSDtfsCounter, 20 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-19 05:04:53,537 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 112 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-19 05:04:53,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-19 05:04:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-19 05:04:53,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 83 states have (on average 1.108433734939759) internal successors, (92), 87 states have internal predecessors, (92), 36 states have call successors, (36), 18 states have call predecessors, (36), 17 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-03-19 05:04:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2022-03-19 05:04:53,561 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 120 [2022-03-19 05:04:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:04:53,561 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2022-03-19 05:04:53,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 6 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 5 states have call predecessors, (20), 5 states have call successors, (20) [2022-03-19 05:04:53,562 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2022-03-19 05:04:53,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-19 05:04:53,562 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:04:53,562 INFO L500 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:04:53,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-19 05:04:53,787 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-19 05:04:53,787 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:04:53,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:04:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 13 times [2022-03-19 05:04:53,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:04:53,788 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1678757370] [2022-03-19 05:04:53,788 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:04:53,788 INFO L85 PathProgramCache]: Analyzing trace with hash 515319041, now seen corresponding path program 14 times [2022-03-19 05:04:53,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:04:53,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767672335] [2022-03-19 05:04:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:04:53,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:04:53,811 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:04:53,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255566976] [2022-03-19 05:04:53,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-19 05:04:53,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:04:53,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:04:53,818 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:04:53,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-19 05:04:53,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-19 05:04:53,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:04:53,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 46 conjunts are in the unsatisfiable core [2022-03-19 05:04:53,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:04:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 46 proven. 70 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2022-03-19 05:04:54,995 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:05:08,215 WARN L232 SmtUtils]: Spent 5.88s on a formula simplification that was a NOOP. DAG size: 140 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:05:42,743 WARN L232 SmtUtils]: Spent 14.73s on a formula simplification that was a NOOP. DAG size: 142 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-03-19 05:06:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 46 proven. 70 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2022-03-19 05:06:27,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:06:27,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767672335] [2022-03-19 05:06:27,260 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:06:27,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255566976] [2022-03-19 05:06:27,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255566976] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:06:27,260 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:06:27,260 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 26 [2022-03-19 05:06:27,261 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:06:27,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1678757370] [2022-03-19 05:06:27,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1678757370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:06:27,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:06:27,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-19 05:06:27,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648322567] [2022-03-19 05:06:27,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:06:27,262 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-19 05:06:27,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:06:27,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-19 05:06:27,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2022-03-19 05:06:27,263 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 05:06:28,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:06:28,659 INFO L93 Difference]: Finished difference Result 241 states and 293 transitions. [2022-03-19 05:06:28,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-19 05:06:28,661 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) Word has length 122 [2022-03-19 05:06:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:06:28,663 INFO L225 Difference]: With dead ends: 241 [2022-03-19 05:06:28,663 INFO L226 Difference]: Without dead ends: 195 [2022-03-19 05:06:28,664 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 217 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=149, Invalid=607, Unknown=0, NotChecked=0, Total=756 [2022-03-19 05:06:28,665 INFO L912 BasicCegarLoop]: 53 mSDtfsCounter, 18 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-19 05:06:28,665 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 518 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-19 05:06:28,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-19 05:06:28,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2022-03-19 05:06:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 118 states have (on average 1.1101694915254237) internal successors, (131), 123 states have internal predecessors, (131), 49 states have call successors, (49), 25 states have call predecessors, (49), 24 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2022-03-19 05:06:28,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 227 transitions. [2022-03-19 05:06:28,698 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 227 transitions. Word has length 122 [2022-03-19 05:06:28,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:06:28,699 INFO L478 AbstractCegarLoop]: Abstraction has 192 states and 227 transitions. [2022-03-19 05:06:28,699 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (22), 2 states have call predecessors, (22), 2 states have return successors, (20), 7 states have call predecessors, (20), 7 states have call successors, (20) [2022-03-19 05:06:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 227 transitions. [2022-03-19 05:06:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-03-19 05:06:28,700 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:06:28,700 INFO L500 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:06:28,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-19 05:06:28,920 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:06:28,921 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:06:28,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:06:28,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 15 times [2022-03-19 05:06:28,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:06:28,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1504082851] [2022-03-19 05:06:28,922 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:06:28,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1224833083, now seen corresponding path program 16 times [2022-03-19 05:06:28,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:06:28,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496689558] [2022-03-19 05:06:28,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:06:28,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:06:28,932 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:06:28,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [690876249] [2022-03-19 05:06:28,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-19 05:06:28,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:06:28,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:06:28,936 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:06:28,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-19 05:06:29,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-19 05:06:29,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:06:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 32 conjunts are in the unsatisfiable core [2022-03-19 05:06:29,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:06:29,379 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-19 05:06:29,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-19 05:06:50,376 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 556 trivial. 0 not checked. [2022-03-19 05:06:50,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-19 05:06:50,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496689558] [2022-03-19 05:06:50,377 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-03-19 05:06:50,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690876249] [2022-03-19 05:06:50,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690876249] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-19 05:06:50,377 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-03-19 05:06:50,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 19 [2022-03-19 05:06:50,377 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-19 05:06:50,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1504082851] [2022-03-19 05:06:50,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1504082851] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-19 05:06:50,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-19 05:06:50,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-03-19 05:06:50,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412140131] [2022-03-19 05:06:50,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-19 05:06:50,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-19 05:06:50,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-19 05:06:50,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-19 05:06:50,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2022-03-19 05:06:50,378 INFO L87 Difference]: Start difference. First operand 192 states and 227 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 05:06:50,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-19 05:06:50,766 INFO L93 Difference]: Finished difference Result 238 states and 285 transitions. [2022-03-19 05:06:50,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-19 05:06:50,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 127 [2022-03-19 05:06:50,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-19 05:06:50,768 INFO L225 Difference]: With dead ends: 238 [2022-03-19 05:06:50,768 INFO L226 Difference]: Without dead ends: 209 [2022-03-19 05:06:50,768 INFO L911 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 235 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2022-03-19 05:06:50,768 INFO L912 BasicCegarLoop]: 72 mSDtfsCounter, 12 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 574 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-19 05:06:50,769 INFO L913 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 574 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-19 05:06:50,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-19 05:06:50,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2022-03-19 05:06:50,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 128 states have (on average 1.1015625) internal successors, (141), 135 states have internal predecessors, (141), 52 states have call successors, (52), 27 states have call predecessors, (52), 26 states have return successors, (49), 44 states have call predecessors, (49), 49 states have call successors, (49) [2022-03-19 05:06:50,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 242 transitions. [2022-03-19 05:06:50,787 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 242 transitions. Word has length 127 [2022-03-19 05:06:50,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-19 05:06:50,788 INFO L478 AbstractCegarLoop]: Abstraction has 207 states and 242 transitions. [2022-03-19 05:06:50,788 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 8 states have call successors, (23), 2 states have call predecessors, (23), 1 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-03-19 05:06:50,788 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 242 transitions. [2022-03-19 05:06:50,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-03-19 05:06:50,790 INFO L492 BasicCegarLoop]: Found error trace [2022-03-19 05:06:50,790 INFO L500 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-19 05:06:50,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-03-19 05:06:51,005 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-19 05:06:51,005 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-19 05:06:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-19 05:06:51,006 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 17 times [2022-03-19 05:06:51,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-19 05:06:51,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [818457539] [2022-03-19 05:06:51,006 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-19 05:06:51,006 INFO L85 PathProgramCache]: Analyzing trace with hash -243845479, now seen corresponding path program 18 times [2022-03-19 05:06:51,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-19 05:06:51,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708075314] [2022-03-19 05:06:51,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-19 05:06:51,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-19 05:06:51,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-03-19 05:06:51,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918651521] [2022-03-19 05:06:51,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-19 05:06:51,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-19 05:06:51,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-19 05:06:51,023 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-19 05:06:51,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-19 05:06:51,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-03-19 05:06:51,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-19 05:06:51,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 83 conjunts are in the unsatisfiable core [2022-03-19 05:06:51,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-19 05:06:53,846 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful