/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 21:15:02,870 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 21:15:02,872 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 21:15:02,906 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 21:15:02,940 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 21:15:02,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 21:15:02,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 21:15:02,943 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-04-06 21:15:02,949 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 21:15:02,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 21:15:02,950 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 21:15:02,950 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 21:15:02,951 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 21:15:02,951 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 21:15:02,951 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 21:15:02,951 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 21:15:02,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 21:15:02,951 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 21:15:02,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 21:15:02,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 21:15:02,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 21:15:02,952 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 21:15:02,952 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 21:15:02,952 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:15:02,952 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 21:15:02,952 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 21:15:02,952 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 21:15:02,952 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 21:15:02,953 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 21:15:02,953 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 21:15:02,953 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 21:15:03,121 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 21:15:03,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 21:15:03,138 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 21:15:03,139 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 21:15:03,139 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 21:15:03,140 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-04-06 21:15:03,179 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a96cecc/13dce30adb844b21b205b0976b876ee1/FLAGad8520d18 [2022-04-06 21:15:03,528 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 21:15:03,529 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd3-ll.c [2022-04-06 21:15:03,533 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a96cecc/13dce30adb844b21b205b0976b876ee1/FLAGad8520d18 [2022-04-06 21:15:03,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8a96cecc/13dce30adb844b21b205b0976b876ee1 [2022-04-06 21:15:03,543 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 21:15:03,544 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 21:15:03,545 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 21:15:03,545 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 21:15:03,547 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 21:15:03,548 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:15:03" (1/1) ... [2022-04-06 21:15:03,548 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7e5cea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03, skipping insertion in model container [2022-04-06 21:15:03,549 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 09:15:03" (1/1) ... [2022-04-06 21:15:03,553 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 21:15:03,564 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 21:15:03,724 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/egcd3-ll.c[490,503] [2022-04-06 21:15:03,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:15:03,755 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 21:15:03,763 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/egcd3-ll.c[490,503] [2022-04-06 21:15:03,781 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 21:15:03,791 INFO L208 MainTranslator]: Completed translation [2022-04-06 21:15:03,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03 WrapperNode [2022-04-06 21:15:03,791 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 21:15:03,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 21:15:03,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 21:15:03,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 21:15:03,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03" (1/1) ... [2022-04-06 21:15:03,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03" (1/1) ... [2022-04-06 21:15:03,805 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03" (1/1) ... [2022-04-06 21:15:03,805 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03" (1/1) ... [2022-04-06 21:15:03,816 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03" (1/1) ... [2022-04-06 21:15:03,821 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03" (1/1) ... [2022-04-06 21:15:03,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03" (1/1) ... [2022-04-06 21:15:03,828 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 21:15:03,829 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 21:15:03,829 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 21:15:03,829 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 21:15:03,830 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03" (1/1) ... [2022-04-06 21:15:03,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 21:15:03,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:03,873 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-04-06 21:15:03,891 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-04-06 21:15:03,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 21:15:03,900 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 21:15:03,900 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 21:15:03,900 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 21:15:03,900 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 21:15:03,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 21:15:03,900 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 21:15:03,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 21:15:03,900 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 21:15:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 21:15:03,942 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 21:15:03,943 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 21:15:04,069 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 21:15:04,073 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 21:15:04,073 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-04-06 21:15:04,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:15:04 BoogieIcfgContainer [2022-04-06 21:15:04,074 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 21:15:04,075 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 21:15:04,076 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 21:15:04,078 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 21:15:04,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 09:15:03" (1/3) ... [2022-04-06 21:15:04,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdeb58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:15:04, skipping insertion in model container [2022-04-06 21:15:04,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 09:15:03" (2/3) ... [2022-04-06 21:15:04,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cdeb58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 09:15:04, skipping insertion in model container [2022-04-06 21:15:04,079 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 09:15:04" (3/3) ... [2022-04-06 21:15:04,080 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd3-ll.c [2022-04-06 21:15:04,083 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 21:15:04,083 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 21:15:04,109 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 21:15:04,114 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-04-06 21:15:04,114 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 21:15:04,136 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-04-06 21:15:04,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-04-06 21:15:04,141 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:04,141 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:04,142 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:04,145 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 1 times [2022-04-06 21:15:04,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:04,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1093296289] [2022-04-06 21:15:04,164 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:04,164 INFO L85 PathProgramCache]: Analyzing trace with hash 642197559, now seen corresponding path program 2 times [2022-04-06 21:15:04,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:04,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874536918] [2022-04-06 21:15:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:04,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:04,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:15:04,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 21:15:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:15:04,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 21:15:04,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:15:04,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-04-06 21:15:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 21:15:04,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:15:04,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:04,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874536918] [2022-04-06 21:15:04,369 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874536918] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:04,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:04,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:15:04,371 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:04,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1093296289] [2022-04-06 21:15:04,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1093296289] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:04,373 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:04,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 21:15:04,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132580097] [2022-04-06 21:15:04,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:04,378 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 21:15:04,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:04,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 21:15:04,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:15:04,402 INFO L87 Difference]: Start difference. First operand has 37 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:15:04,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:04,482 INFO L93 Difference]: Finished difference Result 67 states and 103 transitions. [2022-04-06 21:15:04,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 21:15:04,484 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2022-04-06 21:15:04,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:04,491 INFO L225 Difference]: With dead ends: 67 [2022-04-06 21:15:04,491 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 21:15:04,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 21:15:04,497 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 23 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:04,498 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 40 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:15:04,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 21:15:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 21:15:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-04-06 21:15:04,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-04-06 21:15:04,528 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 22 [2022-04-06 21:15:04,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:04,529 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-04-06 21:15:04,529 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:15:04,529 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-04-06 21:15:04,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-04-06 21:15:04,530 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:04,530 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:04,530 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 21:15:04,530 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:04,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:04,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 1 times [2022-04-06 21:15:04,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:04,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [114007068] [2022-04-06 21:15:04,532 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:04,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1042193974, now seen corresponding path program 2 times [2022-04-06 21:15:04,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:04,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452142723] [2022-04-06 21:15:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:04,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:04,557 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:04,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1180015776] [2022-04-06 21:15:04,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:04,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:04,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:04,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:04,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-04-06 21:15:04,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 21:15:04,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:04,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 21:15:04,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:04,831 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:15:04,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:15:04,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:04,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452142723] [2022-04-06 21:15:04,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:04,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180015776] [2022-04-06 21:15:04,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180015776] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:04,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:04,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:15:04,833 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:04,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [114007068] [2022-04-06 21:15:04,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [114007068] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:04,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:04,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 21:15:04,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649479179] [2022-04-06 21:15:04,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:04,835 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 21:15:04,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 21:15:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:15:04,836 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:15:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:04,910 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2022-04-06 21:15:04,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:15:04,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 23 [2022-04-06 21:15:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:04,912 INFO L225 Difference]: With dead ends: 51 [2022-04-06 21:15:04,912 INFO L226 Difference]: Without dead ends: 48 [2022-04-06 21:15:04,912 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:15:04,913 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 14 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:04,914 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 142 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:15:04,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-04-06 21:15:04,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-04-06 21:15:04,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 21:15:04,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 59 transitions. [2022-04-06 21:15:04,923 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 59 transitions. Word has length 23 [2022-04-06 21:15:04,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:04,923 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 59 transitions. [2022-04-06 21:15:04,924 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:15:04,924 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 59 transitions. [2022-04-06 21:15:04,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-04-06 21:15:04,924 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:04,924 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:04,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:05,140 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:05,140 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:05,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:05,141 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 1 times [2022-04-06 21:15:05,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:05,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1159008172] [2022-04-06 21:15:05,141 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:05,142 INFO L85 PathProgramCache]: Analyzing trace with hash -796982879, now seen corresponding path program 2 times [2022-04-06 21:15:05,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:05,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205274059] [2022-04-06 21:15:05,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:05,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:05,151 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:05,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [572703119] [2022-04-06 21:15:05,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:05,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:05,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:05,153 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:05,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-04-06 21:15:05,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:05,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:05,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 21:15:05,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:15:05,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:05,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:15:05,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205274059] [2022-04-06 21:15:05,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572703119] [2022-04-06 21:15:05,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572703119] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:05,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:05,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 21:15:05,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:05,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1159008172] [2022-04-06 21:15:05,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1159008172] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:05,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:05,426 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:15:05,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659645075] [2022-04-06 21:15:05,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:05,427 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:15:05,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:15:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:15:05,428 INFO L87 Difference]: Start difference. First operand 47 states and 59 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:15:05,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:05,580 INFO L93 Difference]: Finished difference Result 100 states and 138 transitions. [2022-04-06 21:15:05,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:15:05,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-04-06 21:15:05,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:05,582 INFO L225 Difference]: With dead ends: 100 [2022-04-06 21:15:05,582 INFO L226 Difference]: Without dead ends: 93 [2022-04-06 21:15:05,582 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-04-06 21:15:05,583 INFO L913 BasicCegarLoop]: 46 mSDtfsCounter, 71 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:05,584 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 210 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:15:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-04-06 21:15:05,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2022-04-06 21:15:05,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-04-06 21:15:05,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 90 transitions. [2022-04-06 21:15:05,596 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 90 transitions. Word has length 28 [2022-04-06 21:15:05,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:05,596 INFO L478 AbstractCegarLoop]: Abstraction has 68 states and 90 transitions. [2022-04-06 21:15:05,596 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:15:05,597 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 90 transitions. [2022-04-06 21:15:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-04-06 21:15:05,597 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:05,597 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:05,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:05,826 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-04-06 21:15:05,826 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:05,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:05,827 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 1 times [2022-04-06 21:15:05,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:05,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1900253624] [2022-04-06 21:15:05,828 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:05,828 INFO L85 PathProgramCache]: Analyzing trace with hash -709867384, now seen corresponding path program 2 times [2022-04-06 21:15:05,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:05,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026952148] [2022-04-06 21:15:05,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:05,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:05,837 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:05,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [25498950] [2022-04-06 21:15:05,837 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:05,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:05,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:05,838 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:05,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-04-06 21:15:05,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:05,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:05,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 21:15:05,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:15:06,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:15:06,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:06,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026952148] [2022-04-06 21:15:06,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:06,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25498950] [2022-04-06 21:15:06,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25498950] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:06,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:06,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2022-04-06 21:15:06,246 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:06,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1900253624] [2022-04-06 21:15:06,248 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1900253624] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:06,248 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:06,249 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:15:06,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145747520] [2022-04-06 21:15:06,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:06,249 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:15:06,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:06,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:15:06,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:15:06,250 INFO L87 Difference]: Start difference. First operand 68 states and 90 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:15:06,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:06,439 INFO L93 Difference]: Finished difference Result 115 states and 154 transitions. [2022-04-06 21:15:06,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:15:06,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2022-04-06 21:15:06,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:06,440 INFO L225 Difference]: With dead ends: 115 [2022-04-06 21:15:06,440 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 21:15:06,441 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-04-06 21:15:06,441 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 48 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:06,442 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 274 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:15:06,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 21:15:06,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2022-04-06 21:15:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 7 states have call predecessors, (25), 6 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:15:06,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 136 transitions. [2022-04-06 21:15:06,466 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 136 transitions. Word has length 31 [2022-04-06 21:15:06,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:06,466 INFO L478 AbstractCegarLoop]: Abstraction has 102 states and 136 transitions. [2022-04-06 21:15:06,467 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-04-06 21:15:06,467 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 136 transitions. [2022-04-06 21:15:06,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 21:15:06,467 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:06,467 INFO L499 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-04-06 21:15:06,501 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:06,702 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:06,702 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:06,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:06,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 1 times [2022-04-06 21:15:06,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:06,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [649728614] [2022-04-06 21:15:06,704 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:06,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1696776659, now seen corresponding path program 2 times [2022-04-06 21:15:06,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:06,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844324825] [2022-04-06 21:15:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:06,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:06,714 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:06,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1483614044] [2022-04-06 21:15:06,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:06,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:06,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:06,718 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:06,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-04-06 21:15:06,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:06,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:06,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjunts are in the unsatisfiable core [2022-04-06 21:15:06,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:06,855 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 21:15:06,856 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:15:06,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:06,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844324825] [2022-04-06 21:15:06,856 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:06,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483614044] [2022-04-06 21:15:06,856 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483614044] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:06,856 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:06,856 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:15:06,857 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:06,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [649728614] [2022-04-06 21:15:06,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [649728614] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:06,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:06,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 21:15:06,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168934603] [2022-04-06 21:15:06,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:06,857 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 21:15:06,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:06,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 21:15:06,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:15:06,858 INFO L87 Difference]: Start difference. First operand 102 states and 136 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:15:06,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:06,963 INFO L93 Difference]: Finished difference Result 115 states and 153 transitions. [2022-04-06 21:15:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-04-06 21:15:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 36 [2022-04-06 21:15:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:06,965 INFO L225 Difference]: With dead ends: 115 [2022-04-06 21:15:06,965 INFO L226 Difference]: Without dead ends: 113 [2022-04-06 21:15:06,965 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:15:06,966 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 44 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:06,966 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 188 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:15:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-04-06 21:15:06,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-04-06 21:15:06,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 76 states have internal predecessors, (94), 29 states have call successors, (29), 8 states have call predecessors, (29), 7 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 21:15:06,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 150 transitions. [2022-04-06 21:15:06,981 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 150 transitions. Word has length 36 [2022-04-06 21:15:06,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:06,981 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 150 transitions. [2022-04-06 21:15:06,982 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 7 states have internal predecessors, (21), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:15:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 150 transitions. [2022-04-06 21:15:06,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 21:15:06,982 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:06,982 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 21:15:07,012 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:07,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:07,198 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:07,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:07,199 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 1 times [2022-04-06 21:15:07,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:07,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [670016975] [2022-04-06 21:15:07,199 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:07,199 INFO L85 PathProgramCache]: Analyzing trace with hash 331267880, now seen corresponding path program 2 times [2022-04-06 21:15:07,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:07,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822489272] [2022-04-06 21:15:07,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:07,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:07,207 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:07,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129192142] [2022-04-06 21:15:07,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:07,209 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:07,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-04-06 21:15:07,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:07,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:07,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2022-04-06 21:15:07,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-04-06 21:15:07,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:07,604 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:15:07,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:07,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822489272] [2022-04-06 21:15:07,605 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:07,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129192142] [2022-04-06 21:15:07,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129192142] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:07,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:07,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 13 [2022-04-06 21:15:07,605 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:07,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [670016975] [2022-04-06 21:15:07,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [670016975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:07,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:07,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:15:07,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468418121] [2022-04-06 21:15:07,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:07,606 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:15:07,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:07,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:15:07,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:15:07,606 INFO L87 Difference]: Start difference. First operand 112 states and 150 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:15:07,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:07,785 INFO L93 Difference]: Finished difference Result 121 states and 158 transitions. [2022-04-06 21:15:07,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:15:07,786 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-04-06 21:15:07,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:07,787 INFO L225 Difference]: With dead ends: 121 [2022-04-06 21:15:07,787 INFO L226 Difference]: Without dead ends: 119 [2022-04-06 21:15:07,787 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:15:07,788 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 47 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:07,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 240 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:15:07,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-04-06 21:15:07,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2022-04-06 21:15:07,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 78 states have (on average 1.2435897435897436) internal successors, (97), 79 states have internal predecessors, (97), 29 states have call successors, (29), 9 states have call predecessors, (29), 8 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2022-04-06 21:15:07,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 153 transitions. [2022-04-06 21:15:07,800 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 153 transitions. Word has length 36 [2022-04-06 21:15:07,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:07,801 INFO L478 AbstractCegarLoop]: Abstraction has 116 states and 153 transitions. [2022-04-06 21:15:07,801 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2022-04-06 21:15:07,801 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 153 transitions. [2022-04-06 21:15:07,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-04-06 21:15:07,801 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:07,802 INFO L499 BasicCegarLoop]: trace histogram [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] [2022-04-06 21:15:07,826 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:08,020 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:08,021 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:08,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:08,021 INFO L85 PathProgramCache]: Analyzing trace with hash 2006454515, now seen corresponding path program 3 times [2022-04-06 21:15:08,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:08,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [598668930] [2022-04-06 21:15:08,021 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:08,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2006454515, now seen corresponding path program 4 times [2022-04-06 21:15:08,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:08,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975400167] [2022-04-06 21:15:08,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:08,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:08,029 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:08,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985213975] [2022-04-06 21:15:08,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:15:08,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:08,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:08,030 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:08,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-04-06 21:15:08,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:15:08,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:08,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 21:15:08,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:08,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-04-06 21:15:08,158 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:15:08,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:08,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975400167] [2022-04-06 21:15:08,158 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:08,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985213975] [2022-04-06 21:15:08,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985213975] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:08,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:08,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:15:08,159 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:08,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [598668930] [2022-04-06 21:15:08,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [598668930] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:08,159 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:08,159 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:15:08,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267798657] [2022-04-06 21:15:08,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:08,159 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:15:08,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:08,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:15:08,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:15:08,160 INFO L87 Difference]: Start difference. First operand 116 states and 153 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:15:08,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:08,229 INFO L93 Difference]: Finished difference Result 165 states and 227 transitions. [2022-04-06 21:15:08,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:15:08,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 36 [2022-04-06 21:15:08,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:08,231 INFO L225 Difference]: With dead ends: 165 [2022-04-06 21:15:08,231 INFO L226 Difference]: Without dead ends: 127 [2022-04-06 21:15:08,232 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-04-06 21:15:08,232 INFO L913 BasicCegarLoop]: 52 mSDtfsCounter, 18 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:08,232 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 135 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:15:08,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-04-06 21:15:08,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2022-04-06 21:15:08,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 67 states have (on average 1.1940298507462686) internal successors, (80), 68 states have internal predecessors, (80), 25 states have call successors, (25), 9 states have call predecessors, (25), 8 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2022-04-06 21:15:08,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 128 transitions. [2022-04-06 21:15:08,259 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 128 transitions. Word has length 36 [2022-04-06 21:15:08,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:08,259 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 128 transitions. [2022-04-06 21:15:08,259 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-04-06 21:15:08,259 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 128 transitions. [2022-04-06 21:15:08,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 21:15:08,260 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:08,260 INFO L499 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1] [2022-04-06 21:15:08,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:08,492 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:08,492 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:08,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:08,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 1 times [2022-04-06 21:15:08,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:08,493 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [92536033] [2022-04-06 21:15:08,493 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:08,493 INFO L85 PathProgramCache]: Analyzing trace with hash 1445301309, now seen corresponding path program 2 times [2022-04-06 21:15:08,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:08,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037675853] [2022-04-06 21:15:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:08,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:08,501 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:08,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [576632610] [2022-04-06 21:15:08,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:08,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:08,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:08,508 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:08,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-04-06 21:15:08,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:08,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:08,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2022-04-06 21:15:08,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:08,607 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:15:08,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:15:08,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037675853] [2022-04-06 21:15:08,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:08,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576632610] [2022-04-06 21:15:08,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576632610] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:08,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:08,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:15:08,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:08,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [92536033] [2022-04-06 21:15:08,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [92536033] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:08,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:08,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:15:08,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627907424] [2022-04-06 21:15:08,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:08,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:15:08,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:08,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:15:08,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:15:08,609 INFO L87 Difference]: Start difference. First operand 101 states and 128 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, (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) [2022-04-06 21:15:08,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:08,653 INFO L93 Difference]: Finished difference Result 151 states and 206 transitions. [2022-04-06 21:15:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:15:08,654 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, (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 41 [2022-04-06 21:15:08,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:08,655 INFO L225 Difference]: With dead ends: 151 [2022-04-06 21:15:08,655 INFO L226 Difference]: Without dead ends: 149 [2022-04-06 21:15:08,655 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:15:08,655 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 9 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:08,656 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 136 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:15:08,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-04-06 21:15:08,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 130. [2022-04-06 21:15:08,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 75 states have (on average 1.1733333333333333) internal successors, (88), 81 states have internal predecessors, (88), 45 states have call successors, (45), 10 states have call predecessors, (45), 9 states have return successors, (43), 38 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 21:15:08,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 176 transitions. [2022-04-06 21:15:08,670 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 176 transitions. Word has length 41 [2022-04-06 21:15:08,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:08,670 INFO L478 AbstractCegarLoop]: Abstraction has 130 states and 176 transitions. [2022-04-06 21:15:08,671 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, (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) [2022-04-06 21:15:08,671 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 176 transitions. [2022-04-06 21:15:08,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-04-06 21:15:08,671 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:08,671 INFO L499 BasicCegarLoop]: trace histogram [3, 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] [2022-04-06 21:15:08,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-04-06 21:15:08,880 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:08,881 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:08,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:08,881 INFO L85 PathProgramCache]: Analyzing trace with hash -613514168, now seen corresponding path program 1 times [2022-04-06 21:15:08,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:08,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [443853055] [2022-04-06 21:15:08,885 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:08,885 INFO L85 PathProgramCache]: Analyzing trace with hash -613514168, now seen corresponding path program 2 times [2022-04-06 21:15:08,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:08,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30027008] [2022-04-06 21:15:08,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:08,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:08,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:08,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121463254] [2022-04-06 21:15:08,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:08,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:08,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:08,908 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:08,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-04-06 21:15:08,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:08,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:08,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 21:15:08,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:09,153 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-04-06 21:15:09,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:09,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-04-06 21:15:09,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:09,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30027008] [2022-04-06 21:15:09,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:09,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121463254] [2022-04-06 21:15:09,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121463254] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 21:15:09,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:15:09,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 12 [2022-04-06 21:15:09,266 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:09,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [443853055] [2022-04-06 21:15:09,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [443853055] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:09,266 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:09,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:15:09,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913622168] [2022-04-06 21:15:09,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:09,267 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:15:09,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:09,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:15:09,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:15:09,267 INFO L87 Difference]: Start difference. First operand 130 states and 176 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:15:09,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:09,330 INFO L93 Difference]: Finished difference Result 173 states and 245 transitions. [2022-04-06 21:15:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:15:09,330 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 41 [2022-04-06 21:15:09,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:09,333 INFO L225 Difference]: With dead ends: 173 [2022-04-06 21:15:09,333 INFO L226 Difference]: Without dead ends: 171 [2022-04-06 21:15:09,333 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-04-06 21:15:09,334 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:09,334 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 121 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:15:09,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-04-06 21:15:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 167. [2022-04-06 21:15:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 96 states have internal predecessors, (103), 69 states have call successors, (69), 11 states have call predecessors, (69), 10 states have return successors, (67), 59 states have call predecessors, (67), 67 states have call successors, (67) [2022-04-06 21:15:09,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2022-04-06 21:15:09,360 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 41 [2022-04-06 21:15:09,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:09,361 INFO L478 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2022-04-06 21:15:09,361 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 21:15:09,361 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2022-04-06 21:15:09,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-04-06 21:15:09,362 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:09,362 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:09,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:09,595 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,SelfDestructingSolverStorable8 [2022-04-06 21:15:09,596 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:09,596 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 1 times [2022-04-06 21:15:09,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:09,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1186346603] [2022-04-06 21:15:09,597 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:09,597 INFO L85 PathProgramCache]: Analyzing trace with hash -810649216, now seen corresponding path program 2 times [2022-04-06 21:15:09,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:09,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861757618] [2022-04-06 21:15:09,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:09,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:09,607 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:09,607 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508846230] [2022-04-06 21:15:09,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:09,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:09,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:09,608 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:09,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-04-06 21:15:09,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:09,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:09,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 21:15:09,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:10,129 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:15:10,130 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:11,072 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-04-06 21:15:11,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:11,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861757618] [2022-04-06 21:15:11,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:11,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508846230] [2022-04-06 21:15:11,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508846230] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:11,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:11,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2022-04-06 21:15:11,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:11,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1186346603] [2022-04-06 21:15:11,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1186346603] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:11,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:11,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 21:15:11,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448151471] [2022-04-06 21:15:11,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:11,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 21:15:11,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:11,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 21:15:11,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 21:15:11,074 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 21:15:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:11,449 INFO L93 Difference]: Finished difference Result 230 states and 330 transitions. [2022-04-06 21:15:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:15:11,449 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) Word has length 53 [2022-04-06 21:15:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:11,450 INFO L225 Difference]: With dead ends: 230 [2022-04-06 21:15:11,450 INFO L226 Difference]: Without dead ends: 227 [2022-04-06 21:15:11,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2022-04-06 21:15:11,451 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 55 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:11,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 254 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:15:11,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-04-06 21:15:11,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 224. [2022-04-06 21:15:11,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 117 states have (on average 1.188034188034188) internal successors, (139), 128 states have internal predecessors, (139), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 81 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-06 21:15:11,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 323 transitions. [2022-04-06 21:15:11,474 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 323 transitions. Word has length 53 [2022-04-06 21:15:11,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:11,475 INFO L478 AbstractCegarLoop]: Abstraction has 224 states and 323 transitions. [2022-04-06 21:15:11,475 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 3 states have call successors, (7) [2022-04-06 21:15:11,475 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 323 transitions. [2022-04-06 21:15:11,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-04-06 21:15:11,475 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:11,476 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:11,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:11,683 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-04-06 21:15:11,684 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:11,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:11,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1127526485, now seen corresponding path program 3 times [2022-04-06 21:15:11,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:11,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1962785452] [2022-04-06 21:15:11,685 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:11,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1127526485, now seen corresponding path program 4 times [2022-04-06 21:15:11,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:11,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226177322] [2022-04-06 21:15:11,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:11,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:11,720 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:11,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [507274710] [2022-04-06 21:15:11,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:15:11,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:11,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:11,721 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:11,732 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-04-06 21:15:11,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:15:11,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:11,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjunts are in the unsatisfiable core [2022-04-06 21:15:11,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:15:11,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:11,942 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 21:15:11,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:11,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226177322] [2022-04-06 21:15:11,942 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:11,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507274710] [2022-04-06 21:15:11,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507274710] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:11,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:11,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2022-04-06 21:15:11,943 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:11,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1962785452] [2022-04-06 21:15:11,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1962785452] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:11,943 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:11,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:15:11,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855945408] [2022-04-06 21:15:11,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:11,943 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:15:11,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:11,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:15:11,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:15:11,944 INFO L87 Difference]: Start difference. First operand 224 states and 323 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2022-04-06 21:15:12,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:12,259 INFO L93 Difference]: Finished difference Result 335 states and 499 transitions. [2022-04-06 21:15:12,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 21:15:12,260 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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 58 [2022-04-06 21:15:12,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:12,262 INFO L225 Difference]: With dead ends: 335 [2022-04-06 21:15:12,262 INFO L226 Difference]: Without dead ends: 328 [2022-04-06 21:15:12,262 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-04-06 21:15:12,263 INFO L913 BasicCegarLoop]: 82 mSDtfsCounter, 46 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 283 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:12,263 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 283 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:15:12,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-04-06 21:15:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 243. [2022-04-06 21:15:12,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 136 states have (on average 1.2205882352941178) internal successors, (166), 143 states have internal predecessors, (166), 93 states have call successors, (93), 14 states have call predecessors, (93), 13 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-06 21:15:12,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 350 transitions. [2022-04-06 21:15:12,290 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 350 transitions. Word has length 58 [2022-04-06 21:15:12,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:12,290 INFO L478 AbstractCegarLoop]: Abstraction has 243 states and 350 transitions. [2022-04-06 21:15:12,290 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 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) [2022-04-06 21:15:12,290 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 350 transitions. [2022-04-06 21:15:12,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-04-06 21:15:12,291 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:12,291 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:12,308 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:12,508 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,SelfDestructingSolverStorable10 [2022-04-06 21:15:12,508 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:12,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:12,508 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 1 times [2022-04-06 21:15:12,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:12,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1755543634] [2022-04-06 21:15:12,509 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:12,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1658124158, now seen corresponding path program 2 times [2022-04-06 21:15:12,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:12,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370125494] [2022-04-06 21:15:12,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:12,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:12,516 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:12,516 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1896458759] [2022-04-06 21:15:12,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:12,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:12,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:12,531 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:12,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-04-06 21:15:12,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:12,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:12,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 20 conjunts are in the unsatisfiable core [2022-04-06 21:15:12,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:12,746 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 21:15:12,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2022-04-06 21:15:12,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:12,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370125494] [2022-04-06 21:15:12,865 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:12,865 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896458759] [2022-04-06 21:15:12,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896458759] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 21:15:12,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:15:12,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 11 [2022-04-06 21:15:12,866 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:12,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1755543634] [2022-04-06 21:15:12,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1755543634] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:12,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:12,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:15:12,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516774254] [2022-04-06 21:15:12,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:12,866 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:15:12,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:12,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:15:12,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-04-06 21:15:12,867 INFO L87 Difference]: Start difference. First operand 243 states and 350 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-04-06 21:15:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:12,919 INFO L93 Difference]: Finished difference Result 249 states and 355 transitions. [2022-04-06 21:15:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 21:15:12,920 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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 63 [2022-04-06 21:15:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:12,921 INFO L225 Difference]: With dead ends: 249 [2022-04-06 21:15:12,921 INFO L226 Difference]: Without dead ends: 247 [2022-04-06 21:15:12,921 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:15:12,922 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:12,922 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 119 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:15:12,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-04-06 21:15:12,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2022-04-06 21:15:12,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 139 states have (on average 1.2158273381294964) internal successors, (169), 146 states have internal predecessors, (169), 93 states have call successors, (93), 15 states have call predecessors, (93), 14 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-06 21:15:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 353 transitions. [2022-04-06 21:15:12,948 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 353 transitions. Word has length 63 [2022-04-06 21:15:12,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:12,948 INFO L478 AbstractCegarLoop]: Abstraction has 247 states and 353 transitions. [2022-04-06 21:15:12,948 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 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) [2022-04-06 21:15:12,948 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 353 transitions. [2022-04-06 21:15:12,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 21:15:12,949 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:12,949 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 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] [2022-04-06 21:15:12,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:13,167 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,SelfDestructingSolverStorable11 [2022-04-06 21:15:13,167 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:13,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash 425575998, now seen corresponding path program 1 times [2022-04-06 21:15:13,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:13,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [390006780] [2022-04-06 21:15:13,168 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:13,168 INFO L85 PathProgramCache]: Analyzing trace with hash 425575998, now seen corresponding path program 2 times [2022-04-06 21:15:13,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:13,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446438298] [2022-04-06 21:15:13,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:13,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:13,175 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:13,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1154049776] [2022-04-06 21:15:13,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:13,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:13,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:13,177 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:13,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-04-06 21:15:13,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:13,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:13,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 16 conjunts are in the unsatisfiable core [2022-04-06 21:15:13,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 21:15:13,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:13,508 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2022-04-06 21:15:13,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:13,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446438298] [2022-04-06 21:15:13,509 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:13,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154049776] [2022-04-06 21:15:13,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154049776] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:13,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:13,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 21:15:13,510 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:13,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [390006780] [2022-04-06 21:15:13,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [390006780] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:13,510 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:13,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 21:15:13,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160936432] [2022-04-06 21:15:13,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:13,510 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 21:15:13,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:13,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 21:15:13,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 21:15:13,511 INFO L87 Difference]: Start difference. First operand 247 states and 353 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 21:15:13,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:13,671 INFO L93 Difference]: Finished difference Result 261 states and 364 transitions. [2022-04-06 21:15:13,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 21:15:13,672 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 61 [2022-04-06 21:15:13,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:13,673 INFO L225 Difference]: With dead ends: 261 [2022-04-06 21:15:13,673 INFO L226 Difference]: Without dead ends: 259 [2022-04-06 21:15:13,674 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:15:13,674 INFO L913 BasicCegarLoop]: 28 mSDtfsCounter, 22 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:13,675 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 122 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:15:13,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-04-06 21:15:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 259. [2022-04-06 21:15:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 148 states have (on average 1.2027027027027026) internal successors, (178), 155 states have internal predecessors, (178), 93 states have call successors, (93), 18 states have call predecessors, (93), 17 states have return successors, (91), 85 states have call predecessors, (91), 91 states have call successors, (91) [2022-04-06 21:15:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 362 transitions. [2022-04-06 21:15:13,712 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 362 transitions. Word has length 61 [2022-04-06 21:15:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:13,712 INFO L478 AbstractCegarLoop]: Abstraction has 259 states and 362 transitions. [2022-04-06 21:15:13,713 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-04-06 21:15:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 362 transitions. [2022-04-06 21:15:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 21:15:13,713 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:13,713 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 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] [2022-04-06 21:15:13,731 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:13,929 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,SelfDestructingSolverStorable12 [2022-04-06 21:15:13,929 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash -370317859, now seen corresponding path program 3 times [2022-04-06 21:15:13,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:13,930 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1536708996] [2022-04-06 21:15:13,930 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:13,930 INFO L85 PathProgramCache]: Analyzing trace with hash -370317859, now seen corresponding path program 4 times [2022-04-06 21:15:13,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:13,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608358166] [2022-04-06 21:15:13,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:13,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:13,936 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:13,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [37753175] [2022-04-06 21:15:13,937 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:15:13,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:13,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:13,937 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:13,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-04-06 21:15:13,971 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:15:13,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:13,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-04-06 21:15:13,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:14,051 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-04-06 21:15:14,051 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 21:15:14,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:14,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608358166] [2022-04-06 21:15:14,051 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:14,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37753175] [2022-04-06 21:15:14,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37753175] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:14,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:14,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:15:14,052 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:14,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1536708996] [2022-04-06 21:15:14,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1536708996] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:14,052 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:14,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 21:15:14,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028751896] [2022-04-06 21:15:14,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:14,052 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 21:15:14,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:14,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 21:15:14,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-04-06 21:15:14,053 INFO L87 Difference]: Start difference. First operand 259 states and 362 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 21:15:14,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:14,160 INFO L93 Difference]: Finished difference Result 445 states and 620 transitions. [2022-04-06 21:15:14,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 21:15:14,183 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 66 [2022-04-06 21:15:14,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:14,185 INFO L225 Difference]: With dead ends: 445 [2022-04-06 21:15:14,185 INFO L226 Difference]: Without dead ends: 270 [2022-04-06 21:15:14,186 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-04-06 21:15:14,186 INFO L913 BasicCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:14,187 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 119 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 21:15:14,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-04-06 21:15:14,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 250. [2022-04-06 21:15:14,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 147 states have (on average 1.1972789115646258) internal successors, (176), 148 states have internal predecessors, (176), 85 states have call successors, (85), 18 states have call predecessors, (85), 17 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 21:15:14,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 344 transitions. [2022-04-06 21:15:14,252 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 344 transitions. Word has length 66 [2022-04-06 21:15:14,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:14,252 INFO L478 AbstractCegarLoop]: Abstraction has 250 states and 344 transitions. [2022-04-06 21:15:14,252 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 21:15:14,253 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 344 transitions. [2022-04-06 21:15:14,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-04-06 21:15:14,253 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:14,253 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:14,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:14,483 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,SelfDestructingSolverStorable13 [2022-04-06 21:15:14,484 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:14,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1735826638, now seen corresponding path program 5 times [2022-04-06 21:15:14,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:14,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1145864821] [2022-04-06 21:15:14,484 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:14,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1735826638, now seen corresponding path program 6 times [2022-04-06 21:15:14,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:14,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499903947] [2022-04-06 21:15:14,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:14,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:14,490 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:14,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479359640] [2022-04-06 21:15:14,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:15:14,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:14,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:14,491 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:14,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-04-06 21:15:14,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:15:14,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:14,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 68 conjunts are in the unsatisfiable core [2022-04-06 21:15:14,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:15,141 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:15:15,147 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:15:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 32 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:15:15,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:16,514 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:15:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 28 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-04-06 21:15:19,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:19,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499903947] [2022-04-06 21:15:19,550 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:19,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479359640] [2022-04-06 21:15:19,550 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479359640] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:19,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:19,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 28 [2022-04-06 21:15:19,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:19,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1145864821] [2022-04-06 21:15:19,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1145864821] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:19,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:19,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:15:19,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413680805] [2022-04-06 21:15:19,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:19,551 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:15:19,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:19,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:15:19,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2022-04-06 21:15:19,552 INFO L87 Difference]: Start difference. First operand 250 states and 344 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 21:15:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:21,324 INFO L93 Difference]: Finished difference Result 321 states and 431 transitions. [2022-04-06 21:15:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:15:21,324 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 66 [2022-04-06 21:15:21,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:21,327 INFO L225 Difference]: With dead ends: 321 [2022-04-06 21:15:21,327 INFO L226 Difference]: Without dead ends: 319 [2022-04-06 21:15:21,328 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=222, Invalid=1110, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:15:21,329 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 63 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:21,329 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 322 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:15:21,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-04-06 21:15:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 305. [2022-04-06 21:15:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 181 states have (on average 1.1878453038674033) internal successors, (215), 182 states have internal predecessors, (215), 101 states have call successors, (101), 23 states have call predecessors, (101), 22 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2022-04-06 21:15:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 415 transitions. [2022-04-06 21:15:21,373 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 415 transitions. Word has length 66 [2022-04-06 21:15:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:21,374 INFO L478 AbstractCegarLoop]: Abstraction has 305 states and 415 transitions. [2022-04-06 21:15:21,374 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-04-06 21:15:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 415 transitions. [2022-04-06 21:15:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-04-06 21:15:21,375 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:21,375 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 2, 2, 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] [2022-04-06 21:15:21,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:21,587 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:21,588 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:21,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:21,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1596323007, now seen corresponding path program 1 times [2022-04-06 21:15:21,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:21,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1814125815] [2022-04-06 21:15:21,591 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:21,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1596323007, now seen corresponding path program 2 times [2022-04-06 21:15:21,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:21,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403510072] [2022-04-06 21:15:21,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:21,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:21,601 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:21,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562457011] [2022-04-06 21:15:21,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:21,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:21,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:21,603 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:21,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-04-06 21:15:21,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:21,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 62 conjunts are in the unsatisfiable core [2022-04-06 21:15:21,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 52 proven. 19 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2022-04-06 21:15:22,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:22,739 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:15:22,741 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:15:31,643 WARN L855 $PredicateComparison]: unable to prove that (or (not (= c_main_~v~0 (* c_main_~b~0 c_main_~d~0))) (let ((.cse11 (+ c_main_~d~0 c_main_~k~0))) (let ((.cse5 (+ (* (- 1) c_main_~r~0 c_main_~y~0) c_main_~a~0)) (.cse0 (= c_main_~p~0 0)) (.cse6 (* c_main_~s~0 c_main_~y~0)) (.cse1 (* (+ (* (- 1) (* c_main_~s~0 .cse11)) c_main_~r~0) c_main_~y~0)) (.cse2 (+ (* (- 1) c_main_~q~0 .cse11) c_main_~p~0))) (and (let ((.cse3 (div .cse5 c_main_~p~0))) (let ((.cse4 (+ (* c_main_~q~0 .cse3) .cse6))) (or .cse0 (= (+ c_main_~b~0 .cse1 (* .cse2 .cse3)) .cse4) (not (= (mod .cse5 c_main_~p~0) 0)) (not (= c_main_~b~0 .cse4))))) (or (not (= .cse5 0)) (not .cse0) (let ((.cse7 (= c_main_~q~0 0)) (.cse8 (+ c_main_~b~0 (* (- 1) c_main_~s~0 c_main_~y~0)))) (and (or (not .cse7) (not (= 0 .cse8)) (forall ((main_~x~0 Int)) (= (+ (* c_main_~s~0 c_main_~y~0) (* c_main_~q~0 main_~x~0)) (let ((.cse9 (+ c_main_~d~0 c_main_~k~0))) (+ (* (+ (* (- 1) c_main_~q~0 .cse9) c_main_~p~0) main_~x~0) c_main_~b~0 (* (+ (* (- 1) (* c_main_~s~0 .cse9)) c_main_~r~0) c_main_~y~0)))))) (or .cse7 (not (= (mod .cse8 c_main_~q~0) 0)) (let ((.cse10 (div .cse8 c_main_~q~0))) (= (+ .cse6 (* c_main_~q~0 .cse10)) (+ c_main_~b~0 .cse1 (* .cse2 .cse10))))))))))) (not (= (+ c_main_~c~0 (* (- 1) c_main_~v~0)) 0))) is different from true [2022-04-06 21:15:31,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403510072] [2022-04-06 21:15:31,645 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:31,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562457011] [2022-04-06 21:15:31,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562457011] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:15:31,646 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:15:31,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-04-06 21:15:31,646 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:31,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1814125815] [2022-04-06 21:15:31,646 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1814125815] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:31,646 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:31,646 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 21:15:31,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929197076] [2022-04-06 21:15:31,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:31,647 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 21:15:31,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:31,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 21:15:31,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=357, Unknown=1, NotChecked=38, Total=462 [2022-04-06 21:15:31,647 INFO L87 Difference]: Start difference. First operand 305 states and 415 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:15:32,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:32,121 INFO L93 Difference]: Finished difference Result 388 states and 532 transitions. [2022-04-06 21:15:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 21:15:32,122 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) Word has length 75 [2022-04-06 21:15:32,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:32,124 INFO L225 Difference]: With dead ends: 388 [2022-04-06 21:15:32,124 INFO L226 Difference]: Without dead ends: 385 [2022-04-06 21:15:32,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=96, Invalid=507, Unknown=1, NotChecked=46, Total=650 [2022-04-06 21:15:32,126 INFO L913 BasicCegarLoop]: 49 mSDtfsCounter, 54 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 615 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:32,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 258 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 615 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:15:32,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-04-06 21:15:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 318. [2022-04-06 21:15:32,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 189 states have (on average 1.1904761904761905) internal successors, (225), 190 states have internal predecessors, (225), 105 states have call successors, (105), 24 states have call predecessors, (105), 23 states have return successors, (103), 103 states have call predecessors, (103), 103 states have call successors, (103) [2022-04-06 21:15:32,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 433 transitions. [2022-04-06 21:15:32,218 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 433 transitions. Word has length 75 [2022-04-06 21:15:32,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:32,218 INFO L478 AbstractCegarLoop]: Abstraction has 318 states and 433 transitions. [2022-04-06 21:15:32,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 13 states have internal predecessors, (30), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 3 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 21:15:32,219 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 433 transitions. [2022-04-06 21:15:32,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-04-06 21:15:32,219 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:32,220 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 2, 2, 2, 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] [2022-04-06 21:15:32,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:32,439 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,SelfDestructingSolverStorable15 [2022-04-06 21:15:32,439 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:32,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:32,439 INFO L85 PathProgramCache]: Analyzing trace with hash 2103910188, now seen corresponding path program 3 times [2022-04-06 21:15:32,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:32,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1025384571] [2022-04-06 21:15:32,440 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:32,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2103910188, now seen corresponding path program 4 times [2022-04-06 21:15:32,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:32,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704296684] [2022-04-06 21:15:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:32,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:32,445 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:32,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446845520] [2022-04-06 21:15:32,446 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:15:32,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:32,446 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:32,447 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:32,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-04-06 21:15:32,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:15:32,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:32,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 83 conjunts are in the unsatisfiable core [2022-04-06 21:15:32,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:33,258 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 39 proven. 44 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-04-06 21:15:33,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:45,606 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2022-04-06 21:15:45,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:45,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704296684] [2022-04-06 21:15:45,607 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:45,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446845520] [2022-04-06 21:15:45,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446845520] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:45,607 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:45,607 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 27 [2022-04-06 21:15:45,608 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:45,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1025384571] [2022-04-06 21:15:45,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1025384571] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:45,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:45,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:15:45,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479955652] [2022-04-06 21:15:45,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:45,608 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:15:45,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:45,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:15:45,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=591, Unknown=2, NotChecked=0, Total=702 [2022-04-06 21:15:45,609 INFO L87 Difference]: Start difference. First operand 318 states and 433 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 21:15:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:46,643 INFO L93 Difference]: Finished difference Result 406 states and 555 transitions. [2022-04-06 21:15:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:15:46,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) Word has length 80 [2022-04-06 21:15:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:46,645 INFO L225 Difference]: With dead ends: 406 [2022-04-06 21:15:46,645 INFO L226 Difference]: Without dead ends: 403 [2022-04-06 21:15:46,646 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 131 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=148, Invalid=842, Unknown=2, NotChecked=0, Total=992 [2022-04-06 21:15:46,646 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 71 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 1115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:46,646 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 367 Invalid, 1115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-04-06 21:15:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-04-06 21:15:46,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 387. [2022-04-06 21:15:46,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 226 states have (on average 1.1991150442477876) internal successors, (271), 227 states have internal predecessors, (271), 133 states have call successors, (133), 28 states have call predecessors, (133), 27 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2022-04-06 21:15:46,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 535 transitions. [2022-04-06 21:15:46,726 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 535 transitions. Word has length 80 [2022-04-06 21:15:46,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:46,727 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 535 transitions. [2022-04-06 21:15:46,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 5 states have call successors, (11) [2022-04-06 21:15:46,727 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 535 transitions. [2022-04-06 21:15:46,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-04-06 21:15:46,728 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:46,728 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:15:46,746 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:46,940 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-04-06 21:15:46,941 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:46,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:46,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1121309837, now seen corresponding path program 1 times [2022-04-06 21:15:46,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:46,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [963799462] [2022-04-06 21:15:46,942 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:46,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1121309837, now seen corresponding path program 2 times [2022-04-06 21:15:46,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:46,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452769790] [2022-04-06 21:15:46,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:46,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:46,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:46,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985952415] [2022-04-06 21:15:46,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:46,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:46,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:46,957 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:46,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-04-06 21:15:47,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:47,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:47,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 21:15:47,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 21:15:47,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:47,812 INFO L134 CoverageAnalysis]: Checked inductivity of 220 backedges. 20 proven. 16 refuted. 0 times theorem prover too weak. 184 trivial. 0 not checked. [2022-04-06 21:15:47,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:47,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452769790] [2022-04-06 21:15:47,812 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:47,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985952415] [2022-04-06 21:15:47,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985952415] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:47,812 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:47,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 21:15:47,813 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:47,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [963799462] [2022-04-06 21:15:47,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [963799462] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:47,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:47,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 21:15:47,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622459788] [2022-04-06 21:15:47,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:47,813 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 21:15:47,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 21:15:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:15:47,815 INFO L87 Difference]: Start difference. First operand 387 states and 535 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 21:15:48,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:15:48,105 INFO L93 Difference]: Finished difference Result 540 states and 774 transitions. [2022-04-06 21:15:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:15:48,105 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 83 [2022-04-06 21:15:48,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:15:48,108 INFO L225 Difference]: With dead ends: 540 [2022-04-06 21:15:48,108 INFO L226 Difference]: Without dead ends: 538 [2022-04-06 21:15:48,108 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 150 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:15:48,109 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 19 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:15:48,109 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 296 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:15:48,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2022-04-06 21:15:48,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 520. [2022-04-06 21:15:48,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 287 states have (on average 1.2334494773519165) internal successors, (354), 288 states have internal predecessors, (354), 201 states have call successors, (201), 32 states have call predecessors, (201), 31 states have return successors, (199), 199 states have call predecessors, (199), 199 states have call successors, (199) [2022-04-06 21:15:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 754 transitions. [2022-04-06 21:15:48,217 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 754 transitions. Word has length 83 [2022-04-06 21:15:48,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:15:48,217 INFO L478 AbstractCegarLoop]: Abstraction has 520 states and 754 transitions. [2022-04-06 21:15:48,217 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 4 states have call successors, (15), 2 states have call predecessors, (15), 1 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 21:15:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 754 transitions. [2022-04-06 21:15:48,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-04-06 21:15:48,219 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:15:48,219 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 5, 3, 3, 3, 3, 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] [2022-04-06 21:15:48,238 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-04-06 21:15:48,435 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-04-06 21:15:48,436 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:15:48,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:15:48,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1195310033, now seen corresponding path program 7 times [2022-04-06 21:15:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:48,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1566850384] [2022-04-06 21:15:48,437 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:15:48,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1195310033, now seen corresponding path program 8 times [2022-04-06 21:15:48,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:15:48,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255938720] [2022-04-06 21:15:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:15:48,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:15:48,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:15:48,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1578252843] [2022-04-06 21:15:48,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:15:48,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:15:48,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:15:48,445 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:15:48,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-04-06 21:15:48,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:15:48,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:15:48,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 21:15:48,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:15:48,841 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:15:50,827 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:15:50,841 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:15:54,718 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 38 proven. 83 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2022-04-06 21:15:54,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:15:57,200 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 78 proven. 18 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2022-04-06 21:15:57,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:15:57,200 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255938720] [2022-04-06 21:15:57,201 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:15:57,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578252843] [2022-04-06 21:15:57,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578252843] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:15:57,201 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:15:57,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 13] total 31 [2022-04-06 21:15:57,201 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:15:57,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1566850384] [2022-04-06 21:15:57,201 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1566850384] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:15:57,201 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:15:57,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:15:57,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436362486] [2022-04-06 21:15:57,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:15:57,202 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:15:57,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:15:57,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:15:57,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=796, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:15:57,202 INFO L87 Difference]: Start difference. First operand 520 states and 754 transitions. Second operand has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-04-06 21:16:01,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:16:01,490 INFO L93 Difference]: Finished difference Result 606 states and 880 transitions. [2022-04-06 21:16:01,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:16:01,491 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 91 [2022-04-06 21:16:01,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:16:01,494 INFO L225 Difference]: With dead ends: 606 [2022-04-06 21:16:01,494 INFO L226 Difference]: Without dead ends: 604 [2022-04-06 21:16:01,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 150 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:16:01,496 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 68 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 292 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:16:01,496 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 407 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 679 Invalid, 0 Unknown, 292 Unchecked, 2.4s Time] [2022-04-06 21:16:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2022-04-06 21:16:01,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 595. [2022-04-06 21:16:01,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 328 states have (on average 1.2347560975609757) internal successors, (405), 329 states have internal predecessors, (405), 233 states have call successors, (233), 34 states have call predecessors, (233), 33 states have return successors, (231), 231 states have call predecessors, (231), 231 states have call successors, (231) [2022-04-06 21:16:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 869 transitions. [2022-04-06 21:16:01,607 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 869 transitions. Word has length 91 [2022-04-06 21:16:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:16:01,607 INFO L478 AbstractCegarLoop]: Abstraction has 595 states and 869 transitions. [2022-04-06 21:16:01,607 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0) internal successors, (44), 18 states have internal predecessors, (44), 7 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2022-04-06 21:16:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 869 transitions. [2022-04-06 21:16:01,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 21:16:01,608 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:16:01,608 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 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, 1, 1, 1, 1] [2022-04-06 21:16:01,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-04-06 21:16:01,823 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:01,824 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:16:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:16:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1995925058, now seen corresponding path program 5 times [2022-04-06 21:16:01,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1095205270] [2022-04-06 21:16:01,825 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:16:01,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1995925058, now seen corresponding path program 6 times [2022-04-06 21:16:01,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:16:01,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136146768] [2022-04-06 21:16:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:16:01,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:16:01,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:16:01,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513318959] [2022-04-06 21:16:01,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:16:01,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:01,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:16:01,836 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:16:01,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-04-06 21:16:01,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:16:01,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:16:01,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 21:16:01,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:16:02,376 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:02,377 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:02,457 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 57 proven. 33 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2022-04-06 21:16:02,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:16:02,611 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:02,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:16:02,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136146768] [2022-04-06 21:16:02,973 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:16:02,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513318959] [2022-04-06 21:16:02,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513318959] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:16:02,973 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:16:02,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 21:16:02,973 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:16:02,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1095205270] [2022-04-06 21:16:02,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1095205270] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:16:02,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:16:02,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:16:02,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32520264] [2022-04-06 21:16:02,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:16:02,974 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:16:02,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:02,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:16:02,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-04-06 21:16:02,974 INFO L87 Difference]: Start difference. First operand 595 states and 869 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 21:16:03,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:16:03,426 INFO L93 Difference]: Finished difference Result 686 states and 997 transitions. [2022-04-06 21:16:03,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 21:16:03,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 97 [2022-04-06 21:16:03,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:16:03,430 INFO L225 Difference]: With dead ends: 686 [2022-04-06 21:16:03,430 INFO L226 Difference]: Without dead ends: 683 [2022-04-06 21:16:03,430 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2022-04-06 21:16:03,431 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 43 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:16:03,431 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 230 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 21:16:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-04-06 21:16:03,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 675. [2022-04-06 21:16:03,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 372 states have (on average 1.2338709677419355) internal successors, (459), 374 states have internal predecessors, (459), 264 states have call successors, (264), 39 states have call predecessors, (264), 38 states have return successors, (262), 261 states have call predecessors, (262), 262 states have call successors, (262) [2022-04-06 21:16:03,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 985 transitions. [2022-04-06 21:16:03,561 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 985 transitions. Word has length 97 [2022-04-06 21:16:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:16:03,562 INFO L478 AbstractCegarLoop]: Abstraction has 675 states and 985 transitions. [2022-04-06 21:16:03,562 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2022-04-06 21:16:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 985 transitions. [2022-04-06 21:16:03,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-04-06 21:16:03,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:16:03,563 INFO L499 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:16:03,579 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-04-06 21:16:03,779 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:03,779 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:16:03,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:16:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash 288676284, now seen corresponding path program 9 times [2022-04-06 21:16:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:03,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [215213340] [2022-04-06 21:16:03,780 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:16:03,780 INFO L85 PathProgramCache]: Analyzing trace with hash 288676284, now seen corresponding path program 10 times [2022-04-06 21:16:03,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:16:03,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762828165] [2022-04-06 21:16:03,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:16:03,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:16:03,786 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:16:03,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1586040849] [2022-04-06 21:16:03,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:16:03,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:03,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:16:03,787 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:16:03,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-04-06 21:16:03,838 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:16:03,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:16:03,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 107 conjunts are in the unsatisfiable core [2022-04-06 21:16:03,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:16:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-04-06 21:16:05,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:16:07,322 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 87 proven. 18 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2022-04-06 21:16:07,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:16:07,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762828165] [2022-04-06 21:16:07,323 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:16:07,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586040849] [2022-04-06 21:16:07,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586040849] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:16:07,323 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:16:07,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13] total 33 [2022-04-06 21:16:07,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:16:07,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [215213340] [2022-04-06 21:16:07,323 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [215213340] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:16:07,323 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:16:07,323 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:16:07,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599259905] [2022-04-06 21:16:07,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:16:07,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:16:07,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:07,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:16:07,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:16:07,325 INFO L87 Difference]: Start difference. First operand 675 states and 985 transitions. Second operand has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-04-06 21:16:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:16:09,051 INFO L93 Difference]: Finished difference Result 767 states and 1110 transitions. [2022-04-06 21:16:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:16:09,052 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) Word has length 96 [2022-04-06 21:16:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:16:09,056 INFO L225 Difference]: With dead ends: 767 [2022-04-06 21:16:09,056 INFO L226 Difference]: Without dead ends: 765 [2022-04-06 21:16:09,057 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=245, Invalid=1395, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:16:09,057 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 106 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1544 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:16:09,057 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 454 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1544 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 21:16:09,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2022-04-06 21:16:09,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 747. [2022-04-06 21:16:09,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 412 states have (on average 1.233009708737864) internal successors, (508), 414 states have internal predecessors, (508), 292 states have call successors, (292), 43 states have call predecessors, (292), 42 states have return successors, (290), 289 states have call predecessors, (290), 290 states have call successors, (290) [2022-04-06 21:16:09,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1090 transitions. [2022-04-06 21:16:09,219 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1090 transitions. Word has length 96 [2022-04-06 21:16:09,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:16:09,219 INFO L478 AbstractCegarLoop]: Abstraction has 747 states and 1090 transitions. [2022-04-06 21:16:09,219 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 20 states have internal predecessors, (49), 8 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 7 states have call successors, (12) [2022-04-06 21:16:09,219 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1090 transitions. [2022-04-06 21:16:09,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-04-06 21:16:09,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:16:09,220 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:16:09,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-04-06 21:16:09,437 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-04-06 21:16:09,437 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:16:09,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:16:09,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1467188192, now seen corresponding path program 7 times [2022-04-06 21:16:09,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:09,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [275974302] [2022-04-06 21:16:09,438 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:16:09,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1467188192, now seen corresponding path program 8 times [2022-04-06 21:16:09,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:16:09,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704239436] [2022-04-06 21:16:09,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:16:09,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:16:09,443 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:16:09,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1407826842] [2022-04-06 21:16:09,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:16:09,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:09,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:16:09,460 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:16:09,462 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-04-06 21:16:09,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:16:09,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:16:09,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 21:16:09,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:16:10,521 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:10,819 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 71 proven. 76 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2022-04-06 21:16:10,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:16:11,885 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:11,887 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:14,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:16:14,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704239436] [2022-04-06 21:16:14,494 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:16:14,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407826842] [2022-04-06 21:16:14,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407826842] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:16:14,494 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:16:14,494 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 21:16:14,494 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:16:14,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [275974302] [2022-04-06 21:16:14,494 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [275974302] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:16:14,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:16:14,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:16:14,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919774287] [2022-04-06 21:16:14,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:16:14,495 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:16:14,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:14,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:16:14,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=629, Unknown=1, NotChecked=0, Total=756 [2022-04-06 21:16:14,496 INFO L87 Difference]: Start difference. First operand 747 states and 1090 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 21:16:16,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:16:16,943 INFO L93 Difference]: Finished difference Result 831 states and 1208 transitions. [2022-04-06 21:16:16,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:16:16,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 100 [2022-04-06 21:16:16,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:16:16,948 INFO L225 Difference]: With dead ends: 831 [2022-04-06 21:16:16,948 INFO L226 Difference]: Without dead ends: 828 [2022-04-06 21:16:16,949 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 130 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=210, Invalid=1049, Unknown=1, NotChecked=0, Total=1260 [2022-04-06 21:16:16,949 INFO L913 BasicCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:16:16,949 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 369 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-04-06 21:16:16,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2022-04-06 21:16:17,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 819. [2022-04-06 21:16:17,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 452 states have (on average 1.2323008849557522) internal successors, (557), 454 states have internal predecessors, (557), 320 states have call successors, (320), 47 states have call predecessors, (320), 46 states have return successors, (318), 317 states have call predecessors, (318), 318 states have call successors, (318) [2022-04-06 21:16:17,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1195 transitions. [2022-04-06 21:16:17,131 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1195 transitions. Word has length 100 [2022-04-06 21:16:17,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:16:17,131 INFO L478 AbstractCegarLoop]: Abstraction has 819 states and 1195 transitions. [2022-04-06 21:16:17,131 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 15 states have internal predecessors, (35), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2022-04-06 21:16:17,131 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1195 transitions. [2022-04-06 21:16:17,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-04-06 21:16:17,132 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:16:17,132 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:16:17,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-04-06 21:16:17,366 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-04-06 21:16:17,367 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:16:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:16:17,367 INFO L85 PathProgramCache]: Analyzing trace with hash -2052331539, now seen corresponding path program 9 times [2022-04-06 21:16:17,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:17,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1339432385] [2022-04-06 21:16:17,368 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:16:17,368 INFO L85 PathProgramCache]: Analyzing trace with hash -2052331539, now seen corresponding path program 10 times [2022-04-06 21:16:17,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:16:17,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161939355] [2022-04-06 21:16:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:16:17,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:16:17,373 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:16:17,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106538750] [2022-04-06 21:16:17,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:16:17,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:17,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:16:17,388 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:16:17,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-04-06 21:16:17,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:16:17,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:16:17,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 96 conjunts are in the unsatisfiable core [2022-04-06 21:16:17,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:16:19,379 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 95 proven. 59 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2022-04-06 21:16:19,379 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:16:24,886 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-04-06 21:16:24,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:16:24,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161939355] [2022-04-06 21:16:24,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:16:24,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106538750] [2022-04-06 21:16:24,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106538750] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:16:24,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:16:24,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2022-04-06 21:16:24,887 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:16:24,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1339432385] [2022-04-06 21:16:24,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1339432385] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:16:24,887 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:16:24,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:16:24,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244830535] [2022-04-06 21:16:24,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:16:24,887 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:16:24,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:24,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:16:24,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2022-04-06 21:16:24,888 INFO L87 Difference]: Start difference. First operand 819 states and 1195 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 21:16:27,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:16:27,731 INFO L93 Difference]: Finished difference Result 923 states and 1350 transitions. [2022-04-06 21:16:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:16:27,732 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) Word has length 102 [2022-04-06 21:16:27,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:16:27,737 INFO L225 Difference]: With dead ends: 923 [2022-04-06 21:16:27,737 INFO L226 Difference]: Without dead ends: 920 [2022-04-06 21:16:27,737 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 168 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=261, Invalid=1299, Unknown=0, NotChecked=0, Total=1560 [2022-04-06 21:16:27,738 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 86 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 1522 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-04-06 21:16:27,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 384 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1522 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-04-06 21:16:27,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-04-06 21:16:27,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 905. [2022-04-06 21:16:27,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 495 states have (on average 1.2383838383838384) internal successors, (613), 497 states have internal predecessors, (613), 360 states have call successors, (360), 50 states have call predecessors, (360), 49 states have return successors, (358), 357 states have call predecessors, (358), 358 states have call successors, (358) [2022-04-06 21:16:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1331 transitions. [2022-04-06 21:16:27,939 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1331 transitions. Word has length 102 [2022-04-06 21:16:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:16:27,939 INFO L478 AbstractCegarLoop]: Abstraction has 905 states and 1331 transitions. [2022-04-06 21:16:27,939 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 5 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 21:16:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1331 transitions. [2022-04-06 21:16:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 21:16:27,940 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:16:27,940 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-04-06 21:16:27,957 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-04-06 21:16:28,153 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:28,153 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:16:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:16:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1758388651, now seen corresponding path program 11 times [2022-04-06 21:16:28,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:28,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1447174595] [2022-04-06 21:16:28,154 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:16:28,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1758388651, now seen corresponding path program 12 times [2022-04-06 21:16:28,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:16:28,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942567396] [2022-04-06 21:16:28,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:16:28,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:16:28,159 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:16:28,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [929142890] [2022-04-06 21:16:28,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:16:28,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:28,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:16:28,165 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:16:28,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-04-06 21:16:28,243 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 21:16:28,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:16:28,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 87 conjunts are in the unsatisfiable core [2022-04-06 21:16:28,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:16:28,793 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-04-06 21:16:28,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:16:29,914 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 43 proven. 79 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-04-06 21:16:29,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:16:29,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942567396] [2022-04-06 21:16:29,914 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:16:29,914 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929142890] [2022-04-06 21:16:29,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929142890] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:16:29,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:16:29,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 31 [2022-04-06 21:16:29,915 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:16:29,915 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1447174595] [2022-04-06 21:16:29,915 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1447174595] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:16:29,915 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:16:29,915 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 21:16:29,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986108827] [2022-04-06 21:16:29,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:16:29,915 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 21:16:29,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:29,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 21:16:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:16:29,916 INFO L87 Difference]: Start difference. First operand 905 states and 1331 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 21:16:31,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:16:31,105 INFO L93 Difference]: Finished difference Result 990 states and 1451 transitions. [2022-04-06 21:16:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:16:31,105 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) Word has length 105 [2022-04-06 21:16:31,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:16:31,109 INFO L225 Difference]: With dead ends: 990 [2022-04-06 21:16:31,110 INFO L226 Difference]: Without dead ends: 987 [2022-04-06 21:16:31,110 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2022-04-06 21:16:31,111 INFO L913 BasicCegarLoop]: 55 mSDtfsCounter, 75 mSDsluCounter, 341 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 1372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:16:31,111 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 396 Invalid, 1372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 1260 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 21:16:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2022-04-06 21:16:31,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 912. [2022-04-06 21:16:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 501 states have (on average 1.2355289421157685) internal successors, (619), 503 states have internal predecessors, (619), 360 states have call successors, (360), 51 states have call predecessors, (360), 50 states have return successors, (358), 357 states have call predecessors, (358), 358 states have call successors, (358) [2022-04-06 21:16:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1337 transitions. [2022-04-06 21:16:31,323 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1337 transitions. Word has length 105 [2022-04-06 21:16:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:16:31,323 INFO L478 AbstractCegarLoop]: Abstraction has 912 states and 1337 transitions. [2022-04-06 21:16:31,324 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 16 states have internal predecessors, (40), 5 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 21:16:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1337 transitions. [2022-04-06 21:16:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-04-06 21:16:31,325 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:16:31,325 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 3, 3, 3, 3, 3, 3, 3, 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] [2022-04-06 21:16:31,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-04-06 21:16:31,541 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:31,542 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:16:31,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:16:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash -507923061, now seen corresponding path program 13 times [2022-04-06 21:16:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:31,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [643385081] [2022-04-06 21:16:31,542 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:16:31,542 INFO L85 PathProgramCache]: Analyzing trace with hash -507923061, now seen corresponding path program 14 times [2022-04-06 21:16:31,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:16:31,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163667326] [2022-04-06 21:16:31,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:16:31,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:16:31,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:16:31,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802944390] [2022-04-06 21:16:31,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:16:31,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:31,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:16:31,549 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:16:31,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-04-06 21:16:31,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:16:31,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:16:31,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 98 conjunts are in the unsatisfiable core [2022-04-06 21:16:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:16:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 76 proven. 91 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 21:16:32,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:16:34,976 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 122 proven. 17 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2022-04-06 21:16:34,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:16:34,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163667326] [2022-04-06 21:16:34,976 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:16:34,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802944390] [2022-04-06 21:16:34,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802944390] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:16:34,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:16:34,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 30 [2022-04-06 21:16:34,977 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:16:34,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [643385081] [2022-04-06 21:16:34,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [643385081] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:16:34,977 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:16:34,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-04-06 21:16:34,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902830008] [2022-04-06 21:16:34,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:16:34,977 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-04-06 21:16:34,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:34,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-04-06 21:16:34,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:16:34,978 INFO L87 Difference]: Start difference. First operand 912 states and 1337 transitions. Second operand has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 21:16:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:16:36,766 INFO L93 Difference]: Finished difference Result 1057 states and 1544 transitions. [2022-04-06 21:16:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 21:16:36,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 105 [2022-04-06 21:16:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:16:36,770 INFO L225 Difference]: With dead ends: 1057 [2022-04-06 21:16:36,771 INFO L226 Difference]: Without dead ends: 1054 [2022-04-06 21:16:36,771 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 180 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-04-06 21:16:36,771 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 79 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 1366 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 434 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:16:36,772 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 434 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1366 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:16:36,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2022-04-06 21:16:36,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 978. [2022-04-06 21:16:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 978 states, 537 states have (on average 1.23463687150838) internal successors, (663), 539 states have internal predecessors, (663), 384 states have call successors, (384), 57 states have call predecessors, (384), 56 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2022-04-06 21:16:36,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 978 states to 978 states and 1429 transitions. [2022-04-06 21:16:36,983 INFO L78 Accepts]: Start accepts. Automaton has 978 states and 1429 transitions. Word has length 105 [2022-04-06 21:16:36,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:16:36,984 INFO L478 AbstractCegarLoop]: Abstraction has 978 states and 1429 transitions. [2022-04-06 21:16:36,984 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 21:16:36,985 INFO L276 IsEmpty]: Start isEmpty. Operand 978 states and 1429 transitions. [2022-04-06 21:16:36,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 21:16:36,986 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:16:36,986 INFO L499 BasicCegarLoop]: trace histogram [13, 12, 12, 5, 4, 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] [2022-04-06 21:16:37,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-04-06 21:16:37,195 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2022-04-06 21:16:37,195 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:16:37,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:16:37,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2112660426, now seen corresponding path program 15 times [2022-04-06 21:16:37,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:37,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1811478984] [2022-04-06 21:16:37,196 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:16:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash -2112660426, now seen corresponding path program 16 times [2022-04-06 21:16:37,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:16:37,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678373734] [2022-04-06 21:16:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:16:37,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:16:37,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:16:37,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479886861] [2022-04-06 21:16:37,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:16:37,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:37,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:16:37,206 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:16:37,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-04-06 21:16:37,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:16:37,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:16:37,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 117 conjunts are in the unsatisfiable core [2022-04-06 21:16:37,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:16:40,704 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 94 proven. 89 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 21:16:40,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:16:42,894 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 129 proven. 17 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2022-04-06 21:16:42,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:16:42,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678373734] [2022-04-06 21:16:42,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:16:42,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479886861] [2022-04-06 21:16:42,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479886861] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:16:42,895 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:16:42,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 34 [2022-04-06 21:16:42,895 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:16:42,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1811478984] [2022-04-06 21:16:42,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1811478984] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:16:42,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:16:42,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 21:16:42,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678122587] [2022-04-06 21:16:42,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:16:42,896 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 21:16:42,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:42,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 21:16:42,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:16:42,897 INFO L87 Difference]: Start difference. First operand 978 states and 1429 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 21:16:45,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:16:45,847 INFO L93 Difference]: Finished difference Result 1079 states and 1562 transitions. [2022-04-06 21:16:45,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:16:45,848 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) Word has length 110 [2022-04-06 21:16:45,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:16:45,854 INFO L225 Difference]: With dead ends: 1079 [2022-04-06 21:16:45,854 INFO L226 Difference]: Without dead ends: 1076 [2022-04-06 21:16:45,855 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 184 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=280, Invalid=1526, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:16:45,855 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 93 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 1741 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 1741 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:16:45,855 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 510 Invalid, 1821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 1741 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-04-06 21:16:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-04-06 21:16:46,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 930. [2022-04-06 21:16:46,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 515 states have (on average 1.2271844660194176) internal successors, (632), 517 states have internal predecessors, (632), 356 states have call successors, (356), 59 states have call predecessors, (356), 58 states have return successors, (354), 353 states have call predecessors, (354), 354 states have call successors, (354) [2022-04-06 21:16:46,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 1342 transitions. [2022-04-06 21:16:46,069 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 1342 transitions. Word has length 110 [2022-04-06 21:16:46,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:16:46,070 INFO L478 AbstractCegarLoop]: Abstraction has 930 states and 1342 transitions. [2022-04-06 21:16:46,070 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 21 states have internal predecessors, (45), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 21:16:46,070 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 1342 transitions. [2022-04-06 21:16:46,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-04-06 21:16:46,071 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:16:46,071 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:16:46,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-04-06 21:16:46,285 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-04-06 21:16:46,285 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:16:46,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:16:46,285 INFO L85 PathProgramCache]: Analyzing trace with hash -168807214, now seen corresponding path program 1 times [2022-04-06 21:16:46,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:46,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [485809764] [2022-04-06 21:16:46,286 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:16:46,286 INFO L85 PathProgramCache]: Analyzing trace with hash -168807214, now seen corresponding path program 2 times [2022-04-06 21:16:46,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:16:46,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306867081] [2022-04-06 21:16:46,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:16:46,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:16:46,291 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:16:46,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [709113437] [2022-04-06 21:16:46,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:16:46,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:46,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:16:46,292 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:16:46,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-04-06 21:16:46,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:16:46,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:16:46,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 105 conjunts are in the unsatisfiable core [2022-04-06 21:16:46,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:16:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 71 proven. 136 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-04-06 21:16:47,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:16:47,774 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 110 proven. 27 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2022-04-06 21:16:47,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:16:47,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306867081] [2022-04-06 21:16:47,774 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:16:47,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709113437] [2022-04-06 21:16:47,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709113437] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:16:47,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:16:47,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 26 [2022-04-06 21:16:47,775 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:16:47,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [485809764] [2022-04-06 21:16:47,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [485809764] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:16:47,775 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:16:47,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:16:47,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936470073] [2022-04-06 21:16:47,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:16:47,775 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:16:47,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:47,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:16:47,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-04-06 21:16:47,776 INFO L87 Difference]: Start difference. First operand 930 states and 1342 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:16:48,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:16:48,793 INFO L93 Difference]: Finished difference Result 1026 states and 1469 transitions. [2022-04-06 21:16:48,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 21:16:48,794 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) Word has length 113 [2022-04-06 21:16:48,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:16:48,798 INFO L225 Difference]: With dead ends: 1026 [2022-04-06 21:16:48,798 INFO L226 Difference]: Without dead ends: 1024 [2022-04-06 21:16:48,799 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 199 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:16:48,799 INFO L913 BasicCegarLoop]: 54 mSDtfsCounter, 79 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 1245 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:16:48,799 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 401 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1245 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:16:48,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-04-06 21:16:49,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1010. [2022-04-06 21:16:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1010 states, 561 states have (on average 1.2245989304812834) internal successors, (687), 563 states have internal predecessors, (687), 384 states have call successors, (384), 65 states have call predecessors, (384), 64 states have return successors, (382), 381 states have call predecessors, (382), 382 states have call successors, (382) [2022-04-06 21:16:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1010 states to 1010 states and 1453 transitions. [2022-04-06 21:16:49,034 INFO L78 Accepts]: Start accepts. Automaton has 1010 states and 1453 transitions. Word has length 113 [2022-04-06 21:16:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:16:49,034 INFO L478 AbstractCegarLoop]: Abstraction has 1010 states and 1453 transitions. [2022-04-06 21:16:49,034 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 7 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:16:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1010 states and 1453 transitions. [2022-04-06 21:16:49,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-04-06 21:16:49,036 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:16:49,036 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 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] [2022-04-06 21:16:49,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-04-06 21:16:49,250 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-04-06 21:16:49,250 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:16:49,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:16:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1762000771, now seen corresponding path program 3 times [2022-04-06 21:16:49,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:16:49,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1602419868] [2022-04-06 21:16:49,251 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:16:49,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1762000771, now seen corresponding path program 4 times [2022-04-06 21:16:49,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:16:49,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664799957] [2022-04-06 21:16:49,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:16:49,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:16:49,257 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:16:49,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222105931] [2022-04-06 21:16:49,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:16:49,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:16:49,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:16:49,258 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:16:49,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-04-06 21:16:49,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:16:49,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:16:49,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 113 conjunts are in the unsatisfiable core [2022-04-06 21:16:49,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:16:49,861 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,038 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,051 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,142 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,146 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,484 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,489 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,493 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,612 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,620 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,641 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,738 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:50,742 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:52,061 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:52,069 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:52,084 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:52,184 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:52,188 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:52,373 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:52,377 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:52,382 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:55,210 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:55,217 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:55,221 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:55,318 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:55,322 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:55,485 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:55,489 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:55,494 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:56,559 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:56,575 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:56,591 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:56,672 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:56,676 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:56,823 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:56,827 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:56,831 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:57,656 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:57,664 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:57,669 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:57,806 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:57,811 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:58,006 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:58,011 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:58,016 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:59,286 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:59,294 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:59,299 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:59,406 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:59,411 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:59,566 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:59,578 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:16:59,584 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:00,441 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:00,449 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:00,453 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:00,554 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:00,558 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:00,722 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:00,727 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:00,731 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:02,020 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:02,028 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:02,032 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:02,145 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:02,149 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:02,322 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:02,327 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:02,332 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:09,829 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:09,839 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:09,844 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:09,965 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:09,969 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:10,128 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:10,133 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:10,137 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:11,027 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:11,042 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:11,047 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:11,164 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:11,168 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:11,348 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:11,353 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:11,359 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:12,288 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:12,296 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:12,301 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:12,335 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:12,340 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:12,405 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:12,409 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:12,413 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:24,019 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:17:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 90 proven. 129 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2022-04-06 21:17:30,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:18:23,011 WARN L232 SmtUtils]: Spent 7.12s on a formula simplification that was a NOOP. DAG size: 63 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:18:56,326 WARN L232 SmtUtils]: Spent 11.66s on a formula simplification that was a NOOP. DAG size: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:19:04,669 INFO L134 CoverageAnalysis]: Checked inductivity of 415 backedges. 116 proven. 87 refuted. 0 times theorem prover too weak. 212 trivial. 0 not checked. [2022-04-06 21:19:04,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:19:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664799957] [2022-04-06 21:19:04,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:19:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222105931] [2022-04-06 21:19:04,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222105931] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:19:04,670 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:19:04,670 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 19] total 38 [2022-04-06 21:19:04,670 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:19:04,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1602419868] [2022-04-06 21:19:04,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1602419868] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:19:04,670 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:19:04,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-04-06 21:19:04,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38676071] [2022-04-06 21:19:04,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:19:04,671 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-04-06 21:19:04,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:04,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-04-06 21:19:04,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=1133, Unknown=6, NotChecked=0, Total=1406 [2022-04-06 21:19:04,672 INFO L87 Difference]: Start difference. First operand 1010 states and 1453 transitions. Second operand has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:19:10,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:19:10,877 INFO L93 Difference]: Finished difference Result 1048 states and 1497 transitions. [2022-04-06 21:19:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:19:10,878 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 118 [2022-04-06 21:19:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:19:10,882 INFO L225 Difference]: With dead ends: 1048 [2022-04-06 21:19:10,882 INFO L226 Difference]: Without dead ends: 1046 [2022-04-06 21:19:10,883 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 79.7s TimeCoverageRelationStatistics Valid=344, Invalid=1540, Unknown=8, NotChecked=0, Total=1892 [2022-04-06 21:19:10,883 INFO L913 BasicCegarLoop]: 58 mSDtfsCounter, 56 mSDsluCounter, 568 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 534 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 21:19:10,884 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 626 Invalid, 1569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 990 Invalid, 0 Unknown, 534 Unchecked, 0.8s Time] [2022-04-06 21:19:10,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1046 states. [2022-04-06 21:19:11,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1046 to 1036. [2022-04-06 21:19:11,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 580 states have (on average 1.2189655172413794) internal successors, (707), 583 states have internal predecessors, (707), 390 states have call successors, (390), 66 states have call predecessors, (390), 65 states have return successors, (388), 386 states have call predecessors, (388), 388 states have call successors, (388) [2022-04-06 21:19:11,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 1485 transitions. [2022-04-06 21:19:11,144 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 1485 transitions. Word has length 118 [2022-04-06 21:19:11,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:19:11,144 INFO L478 AbstractCegarLoop]: Abstraction has 1036 states and 1485 transitions. [2022-04-06 21:19:11,144 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:19:11,144 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 1485 transitions. [2022-04-06 21:19:11,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 21:19:11,146 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:19:11,146 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:19:11,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-04-06 21:19:11,363 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-04-06 21:19:11,363 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:19:11,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:19:11,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1720382047, now seen corresponding path program 17 times [2022-04-06 21:19:11,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:11,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [948867830] [2022-04-06 21:19:11,364 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:19:11,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1720382047, now seen corresponding path program 18 times [2022-04-06 21:19:11,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:19:11,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427268892] [2022-04-06 21:19:11,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:19:11,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:19:11,369 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:19:11,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509222122] [2022-04-06 21:19:11,369 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:19:11,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:19:11,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:19:11,370 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:19:11,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-04-06 21:19:11,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 21:19:11,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:19:11,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 6 conjunts are in the unsatisfiable core [2022-04-06 21:19:11,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:19:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 243 proven. 18 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-04-06 21:19:11,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:19:11,818 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 59 proven. 18 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2022-04-06 21:19:11,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:19:11,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427268892] [2022-04-06 21:19:11,818 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:19:11,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509222122] [2022-04-06 21:19:11,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509222122] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:19:11,818 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:19:11,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2022-04-06 21:19:11,818 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:19:11,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [948867830] [2022-04-06 21:19:11,819 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [948867830] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:19:11,819 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:19:11,819 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-04-06 21:19:11,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390463740] [2022-04-06 21:19:11,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:19:11,819 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-04-06 21:19:11,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:11,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-04-06 21:19:11,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 21:19:11,819 INFO L87 Difference]: Start difference. First operand 1036 states and 1485 transitions. Second operand has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:19:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:19:12,294 INFO L93 Difference]: Finished difference Result 1668 states and 2417 transitions. [2022-04-06 21:19:12,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 21:19:12,295 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) Word has length 122 [2022-04-06 21:19:12,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:19:12,300 INFO L225 Difference]: With dead ends: 1668 [2022-04-06 21:19:12,300 INFO L226 Difference]: Without dead ends: 1176 [2022-04-06 21:19:12,302 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-04-06 21:19:12,302 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 9 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 21:19:12,303 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 216 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 21:19:12,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1176 states. [2022-04-06 21:19:12,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1176 to 1079. [2022-04-06 21:19:12,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1079 states, 616 states have (on average 1.2077922077922079) internal successors, (744), 641 states have internal predecessors, (744), 400 states have call successors, (400), 63 states have call predecessors, (400), 62 states have return successors, (398), 374 states have call predecessors, (398), 398 states have call successors, (398) [2022-04-06 21:19:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1542 transitions. [2022-04-06 21:19:12,590 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1542 transitions. Word has length 122 [2022-04-06 21:19:12,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:19:12,590 INFO L478 AbstractCegarLoop]: Abstraction has 1079 states and 1542 transitions. [2022-04-06 21:19:12,590 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 7 states have internal predecessors, (36), 5 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:19:12,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1542 transitions. [2022-04-06 21:19:12,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-04-06 21:19:12,592 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:19:12,592 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:19:12,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-04-06 21:19:12,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-04-06 21:19:12,828 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:19:12,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:19:12,828 INFO L85 PathProgramCache]: Analyzing trace with hash -295969793, now seen corresponding path program 19 times [2022-04-06 21:19:12,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:12,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [421088038] [2022-04-06 21:19:12,829 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:19:12,829 INFO L85 PathProgramCache]: Analyzing trace with hash -295969793, now seen corresponding path program 20 times [2022-04-06 21:19:12,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:19:12,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265166242] [2022-04-06 21:19:12,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:19:12,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:19:12,836 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:19:12,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1828719033] [2022-04-06 21:19:12,836 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:19:12,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:19:12,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:19:12,837 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:19:12,838 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-04-06 21:19:12,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:19:12,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:19:12,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 70 conjunts are in the unsatisfiable core [2022-04-06 21:19:12,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:19:15,940 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 90 proven. 71 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 21:19:15,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:19:17,980 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:19:17,982 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:19:23,446 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 90 proven. 71 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 21:19:23,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:19:23,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265166242] [2022-04-06 21:19:23,446 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:19:23,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828719033] [2022-04-06 21:19:23,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828719033] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:19:23,446 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:19:23,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2022-04-06 21:19:23,447 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:19:23,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [421088038] [2022-04-06 21:19:23,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [421088038] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:19:23,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:19:23,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-04-06 21:19:23,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876469972] [2022-04-06 21:19:23,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:19:23,447 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-04-06 21:19:23,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:23,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-04-06 21:19:23,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2022-04-06 21:19:23,448 INFO L87 Difference]: Start difference. First operand 1079 states and 1542 transitions. Second operand has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 21:19:25,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:19:25,690 INFO L93 Difference]: Finished difference Result 1207 states and 1726 transitions. [2022-04-06 21:19:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 21:19:25,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 122 [2022-04-06 21:19:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:19:25,695 INFO L225 Difference]: With dead ends: 1207 [2022-04-06 21:19:25,695 INFO L226 Difference]: Without dead ends: 1204 [2022-04-06 21:19:25,696 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=220, Invalid=970, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:19:25,697 INFO L913 BasicCegarLoop]: 53 mSDtfsCounter, 57 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 1103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:19:25,697 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 329 Invalid, 1103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 21:19:25,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-04-06 21:19:25,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1118. [2022-04-06 21:19:25,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 636 states have (on average 1.2091194968553458) internal successors, (769), 661 states have internal predecessors, (769), 416 states have call successors, (416), 66 states have call predecessors, (416), 65 states have return successors, (414), 390 states have call predecessors, (414), 414 states have call successors, (414) [2022-04-06 21:19:25,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1599 transitions. [2022-04-06 21:19:25,988 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1599 transitions. Word has length 122 [2022-04-06 21:19:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:19:25,988 INFO L478 AbstractCegarLoop]: Abstraction has 1118 states and 1599 transitions. [2022-04-06 21:19:25,988 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 21:19:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1599 transitions. [2022-04-06 21:19:25,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-04-06 21:19:25,991 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:19:25,991 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-04-06 21:19:26,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-04-06 21:19:26,212 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:19:26,212 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:19:26,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:19:26,213 INFO L85 PathProgramCache]: Analyzing trace with hash -233883154, now seen corresponding path program 21 times [2022-04-06 21:19:26,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:26,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1949953494] [2022-04-06 21:19:26,213 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:19:26,213 INFO L85 PathProgramCache]: Analyzing trace with hash -233883154, now seen corresponding path program 22 times [2022-04-06 21:19:26,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:19:26,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403466288] [2022-04-06 21:19:26,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:19:26,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:19:26,220 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:19:26,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958621612] [2022-04-06 21:19:26,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:19:26,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:19:26,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:19:26,222 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:19:26,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-04-06 21:19:26,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:19:26,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:19:26,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 21:19:26,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:19:27,830 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 139 proven. 89 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2022-04-06 21:19:27,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:19:38,139 INFO L134 CoverageAnalysis]: Checked inductivity of 565 backedges. 149 proven. 47 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2022-04-06 21:19:38,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:19:38,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403466288] [2022-04-06 21:19:38,140 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:19:38,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958621612] [2022-04-06 21:19:38,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958621612] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:19:38,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:19:38,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 18] total 35 [2022-04-06 21:19:38,140 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:19:38,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1949953494] [2022-04-06 21:19:38,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1949953494] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:19:38,140 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:19:38,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:19:38,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931226753] [2022-04-06 21:19:38,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:19:38,141 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:19:38,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:38,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:19:38,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2022-04-06 21:19:38,141 INFO L87 Difference]: Start difference. First operand 1118 states and 1599 transitions. Second operand has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 21:19:40,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:19:40,090 INFO L93 Difference]: Finished difference Result 1243 states and 1785 transitions. [2022-04-06 21:19:40,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:19:40,091 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 124 [2022-04-06 21:19:40,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:19:40,095 INFO L225 Difference]: With dead ends: 1243 [2022-04-06 21:19:40,095 INFO L226 Difference]: Without dead ends: 1240 [2022-04-06 21:19:40,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 210 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=293, Invalid=1429, Unknown=0, NotChecked=0, Total=1722 [2022-04-06 21:19:40,096 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 93 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 1739 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:19:40,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 431 Invalid, 1814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1739 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:19:40,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1240 states. [2022-04-06 21:19:40,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1240 to 1128. [2022-04-06 21:19:40,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1128 states, 641 states have (on average 1.2090483619344774) internal successors, (775), 666 states have internal predecessors, (775), 420 states have call successors, (420), 67 states have call predecessors, (420), 66 states have return successors, (418), 394 states have call predecessors, (418), 418 states have call successors, (418) [2022-04-06 21:19:40,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1128 states to 1128 states and 1613 transitions. [2022-04-06 21:19:40,406 INFO L78 Accepts]: Start accepts. Automaton has 1128 states and 1613 transitions. Word has length 124 [2022-04-06 21:19:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:19:40,406 INFO L478 AbstractCegarLoop]: Abstraction has 1128 states and 1613 transitions. [2022-04-06 21:19:40,406 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 21:19:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1128 states and 1613 transitions. [2022-04-06 21:19:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-04-06 21:19:40,407 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:19:40,408 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 7, 4, 4, 4, 4, 4, 4, 4, 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] [2022-04-06 21:19:40,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-04-06 21:19:40,625 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2022-04-06 21:19:40,626 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:19:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:19:40,626 INFO L85 PathProgramCache]: Analyzing trace with hash 145019419, now seen corresponding path program 11 times [2022-04-06 21:19:40,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:40,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1266169395] [2022-04-06 21:19:40,627 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:19:40,627 INFO L85 PathProgramCache]: Analyzing trace with hash 145019419, now seen corresponding path program 12 times [2022-04-06 21:19:40,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:19:40,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535575685] [2022-04-06 21:19:40,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:19:40,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:19:40,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:19:40,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399142067] [2022-04-06 21:19:40,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:19:40,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:19:40,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:19:40,633 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:19:40,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-04-06 21:19:40,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 21:19:40,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:19:40,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 21:19:40,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:19:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 126 proven. 42 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-04-06 21:19:40,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:19:44,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:19:44,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535575685] [2022-04-06 21:19:44,184 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:19:44,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399142067] [2022-04-06 21:19:44,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399142067] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:19:44,185 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:19:44,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-04-06 21:19:44,185 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:19:44,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1266169395] [2022-04-06 21:19:44,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1266169395] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:19:44,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:19:44,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 21:19:44,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026257370] [2022-04-06 21:19:44,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:19:44,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 21:19:44,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:44,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 21:19:44,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-04-06 21:19:44,186 INFO L87 Difference]: Start difference. First operand 1128 states and 1613 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 21:19:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:19:45,026 INFO L93 Difference]: Finished difference Result 1166 states and 1653 transitions. [2022-04-06 21:19:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 21:19:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) Word has length 121 [2022-04-06 21:19:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:19:45,031 INFO L225 Difference]: With dead ends: 1166 [2022-04-06 21:19:45,031 INFO L226 Difference]: Without dead ends: 1164 [2022-04-06 21:19:45,032 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-04-06 21:19:45,032 INFO L913 BasicCegarLoop]: 26 mSDtfsCounter, 61 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 21:19:45,032 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 182 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 21:19:45,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2022-04-06 21:19:45,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 1111. [2022-04-06 21:19:45,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 628 states have (on average 1.2117834394904459) internal successors, (761), 653 states have internal predecessors, (761), 416 states have call successors, (416), 67 states have call predecessors, (416), 66 states have return successors, (414), 390 states have call predecessors, (414), 414 states have call successors, (414) [2022-04-06 21:19:45,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1591 transitions. [2022-04-06 21:19:45,369 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1591 transitions. Word has length 121 [2022-04-06 21:19:45,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:19:45,369 INFO L478 AbstractCegarLoop]: Abstraction has 1111 states and 1591 transitions. [2022-04-06 21:19:45,370 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 3 states have call predecessors, (15), 4 states have call successors, (15) [2022-04-06 21:19:45,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1591 transitions. [2022-04-06 21:19:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 21:19:45,371 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:19:45,371 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-04-06 21:19:45,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-04-06 21:19:45,571 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:19:45,572 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:19:45,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:19:45,572 INFO L85 PathProgramCache]: Analyzing trace with hash -785055564, now seen corresponding path program 23 times [2022-04-06 21:19:45,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:19:45,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1443246600] [2022-04-06 21:19:45,572 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:19:45,573 INFO L85 PathProgramCache]: Analyzing trace with hash -785055564, now seen corresponding path program 24 times [2022-04-06 21:19:45,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:19:45,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658401621] [2022-04-06 21:19:45,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:19:45,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:19:45,577 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:19:45,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [881187481] [2022-04-06 21:19:45,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:19:45,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:19:45,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:19:45,579 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:19:45,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-04-06 21:19:45,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 21:19:45,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:19:45,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 89 conjunts are in the unsatisfiable core [2022-04-06 21:19:45,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:19:47,088 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:19:47,100 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:19:47,102 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:19:47,103 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:19:47,104 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:19:58,218 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 51 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 21:19:58,218 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:20:01,259 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:20:05,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:20:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658401621] [2022-04-06 21:20:05,424 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:20:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881187481] [2022-04-06 21:20:05,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881187481] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:20:05,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:20:05,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2022-04-06 21:20:05,424 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:20:05,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1443246600] [2022-04-06 21:20:05,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1443246600] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:20:05,424 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:20:05,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:20:05,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076515944] [2022-04-06 21:20:05,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:20:05,425 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:20:05,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:05,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:20:05,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=694, Unknown=1, NotChecked=0, Total=812 [2022-04-06 21:20:05,426 INFO L87 Difference]: Start difference. First operand 1111 states and 1591 transitions. Second operand has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:20:16,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:20:16,377 INFO L93 Difference]: Finished difference Result 1237 states and 1772 transitions. [2022-04-06 21:20:16,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:20:16,378 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 127 [2022-04-06 21:20:16,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:20:16,383 INFO L225 Difference]: With dead ends: 1237 [2022-04-06 21:20:16,383 INFO L226 Difference]: Without dead ends: 1234 [2022-04-06 21:20:16,383 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 179 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 17.5s TimeCoverageRelationStatistics Valid=238, Invalid=1400, Unknown=2, NotChecked=0, Total=1640 [2022-04-06 21:20:16,384 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 75 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 1425 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:20:16,384 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 429 Invalid, 1516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1425 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-04-06 21:20:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2022-04-06 21:20:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1140. [2022-04-06 21:20:16,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 643 states have (on average 1.213063763608087) internal successors, (780), 668 states have internal predecessors, (780), 428 states have call successors, (428), 69 states have call predecessors, (428), 68 states have return successors, (426), 402 states have call predecessors, (426), 426 states have call successors, (426) [2022-04-06 21:20:16,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 1634 transitions. [2022-04-06 21:20:16,758 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 1634 transitions. Word has length 127 [2022-04-06 21:20:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:20:16,758 INFO L478 AbstractCegarLoop]: Abstraction has 1140 states and 1634 transitions. [2022-04-06 21:20:16,758 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 states have internal predecessors, (42), 6 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2022-04-06 21:20:16,759 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 1634 transitions. [2022-04-06 21:20:16,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 21:20:16,760 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:20:16,760 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-04-06 21:20:16,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-04-06 21:20:16,975 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:20:16,975 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:20:16,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:20:16,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1733174004, now seen corresponding path program 25 times [2022-04-06 21:20:16,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:16,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1551729906] [2022-04-06 21:20:16,976 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:20:16,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1733174004, now seen corresponding path program 26 times [2022-04-06 21:20:16,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:20:16,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571234837] [2022-04-06 21:20:16,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:20:16,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:20:16,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:20:16,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1562703929] [2022-04-06 21:20:16,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:20:16,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:20:16,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:20:16,984 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:20:16,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-04-06 21:20:17,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:20:17,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:20:17,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 21:20:17,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:20:18,069 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 126 proven. 127 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-04-06 21:20:18,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:20:21,364 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 160 proven. 41 refuted. 0 times theorem prover too weak. 371 trivial. 0 not checked. [2022-04-06 21:20:21,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:20:21,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571234837] [2022-04-06 21:20:21,365 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:20:21,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562703929] [2022-04-06 21:20:21,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562703929] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:20:21,365 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:20:21,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 32 [2022-04-06 21:20:21,365 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:20:21,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1551729906] [2022-04-06 21:20:21,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1551729906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:20:21,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:20:21,366 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:20:21,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128045718] [2022-04-06 21:20:21,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:20:21,366 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:20:21,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:21,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:20:21,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2022-04-06 21:20:21,367 INFO L87 Difference]: Start difference. First operand 1140 states and 1634 transitions. Second operand has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 21:20:24,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:20:24,105 INFO L93 Difference]: Finished difference Result 1268 states and 1824 transitions. [2022-04-06 21:20:24,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-04-06 21:20:24,106 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 127 [2022-04-06 21:20:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:20:24,115 INFO L225 Difference]: With dead ends: 1268 [2022-04-06 21:20:24,115 INFO L226 Difference]: Without dead ends: 1265 [2022-04-06 21:20:24,116 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 219 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=196, Invalid=1210, Unknown=0, NotChecked=0, Total=1406 [2022-04-06 21:20:24,116 INFO L913 BasicCegarLoop]: 62 mSDtfsCounter, 71 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 1222 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 21:20:24,116 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 388 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1222 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 21:20:24,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1265 states. [2022-04-06 21:20:24,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1265 to 1239. [2022-04-06 21:20:24,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 694 states have (on average 1.217579250720461) internal successors, (845), 721 states have internal predecessors, (845), 472 states have call successors, (472), 73 states have call predecessors, (472), 72 states have return successors, (470), 444 states have call predecessors, (470), 470 states have call successors, (470) [2022-04-06 21:20:24,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1787 transitions. [2022-04-06 21:20:24,514 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1787 transitions. Word has length 127 [2022-04-06 21:20:24,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:20:24,514 INFO L478 AbstractCegarLoop]: Abstraction has 1239 states and 1787 transitions. [2022-04-06 21:20:24,514 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 states have internal predecessors, (42), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 21:20:24,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1787 transitions. [2022-04-06 21:20:24,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-04-06 21:20:24,516 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:20:24,516 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 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] [2022-04-06 21:20:24,533 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-04-06 21:20:24,733 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2022-04-06 21:20:24,734 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:20:24,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:20:24,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1154574132, now seen corresponding path program 27 times [2022-04-06 21:20:24,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:24,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1554144245] [2022-04-06 21:20:24,735 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:20:24,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1154574132, now seen corresponding path program 28 times [2022-04-06 21:20:24,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:20:24,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528053782] [2022-04-06 21:20:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:20:24,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:20:24,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:20:24,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [946213779] [2022-04-06 21:20:24,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:20:24,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:20:24,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:20:24,743 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:20:24,767 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-04-06 21:20:24,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:20:24,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:20:24,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 116 conjunts are in the unsatisfiable core [2022-04-06 21:20:24,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:20:25,604 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:20:25,604 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:20:27,428 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 137 proven. 134 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2022-04-06 21:20:27,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:20:32,518 INFO L134 CoverageAnalysis]: Checked inductivity of 572 backedges. 178 proven. 17 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2022-04-06 21:20:32,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:20:32,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528053782] [2022-04-06 21:20:32,518 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:20:32,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946213779] [2022-04-06 21:20:32,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946213779] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:20:32,518 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:20:32,518 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 16] total 37 [2022-04-06 21:20:32,519 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:20:32,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1554144245] [2022-04-06 21:20:32,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1554144245] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:20:32,519 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:20:32,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-04-06 21:20:32,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395944843] [2022-04-06 21:20:32,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:20:32,519 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-04-06 21:20:32,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:32,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-04-06 21:20:32,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1102, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:20:32,520 INFO L87 Difference]: Start difference. First operand 1239 states and 1787 transitions. Second operand has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 21:20:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:20:37,489 INFO L93 Difference]: Finished difference Result 1339 states and 1928 transitions. [2022-04-06 21:20:37,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-04-06 21:20:37,490 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 127 [2022-04-06 21:20:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:20:37,496 INFO L225 Difference]: With dead ends: 1339 [2022-04-06 21:20:37,496 INFO L226 Difference]: Without dead ends: 1336 [2022-04-06 21:20:37,496 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 217 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=0, NotChecked=0, Total=2070 [2022-04-06 21:20:37,497 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 93 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 2059 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 2059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:20:37,497 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 495 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 2059 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-04-06 21:20:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-04-06 21:20:37,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1243. [2022-04-06 21:20:37,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1243 states, 697 states have (on average 1.2166427546628407) internal successors, (848), 724 states have internal predecessors, (848), 472 states have call successors, (472), 74 states have call predecessors, (472), 73 states have return successors, (470), 444 states have call predecessors, (470), 470 states have call successors, (470) [2022-04-06 21:20:37,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1243 states to 1243 states and 1790 transitions. [2022-04-06 21:20:37,882 INFO L78 Accepts]: Start accepts. Automaton has 1243 states and 1790 transitions. Word has length 127 [2022-04-06 21:20:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:20:37,882 INFO L478 AbstractCegarLoop]: Abstraction has 1243 states and 1790 transitions. [2022-04-06 21:20:37,883 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 1.875) internal successors, (45), 23 states have internal predecessors, (45), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 21:20:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 1243 states and 1790 transitions. [2022-04-06 21:20:37,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-04-06 21:20:37,885 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:20:37,885 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-04-06 21:20:37,903 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-04-06 21:20:38,095 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-04-06 21:20:38,096 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:20:38,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:20:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1501110486, now seen corresponding path program 29 times [2022-04-06 21:20:38,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:20:38,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [112391994] [2022-04-06 21:20:38,096 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:20:38,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1501110486, now seen corresponding path program 30 times [2022-04-06 21:20:38,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:20:38,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650983857] [2022-04-06 21:20:38,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:20:38,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:20:38,101 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:20:38,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [274157101] [2022-04-06 21:20:38,102 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:20:38,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:20:38,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:20:38,116 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:20:38,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-04-06 21:20:38,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 21:20:38,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:20:38,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 111 conjunts are in the unsatisfiable core [2022-04-06 21:20:38,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:20:40,014 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 135 proven. 128 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-04-06 21:20:40,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:20:52,989 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:20:52,991 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:21:23,473 WARN L232 SmtUtils]: Spent 6.23s on a formula simplification that was a NOOP. DAG size: 56 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 21:21:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 156 proven. 107 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-04-06 21:21:36,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:36,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650983857] [2022-04-06 21:21:36,580 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:36,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274157101] [2022-04-06 21:21:36,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274157101] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:21:36,580 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:21:36,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 40 [2022-04-06 21:21:36,580 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:36,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [112391994] [2022-04-06 21:21:36,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [112391994] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:36,580 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:36,581 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:21:36,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026351895] [2022-04-06 21:21:36,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:36,581 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:21:36,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:36,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:21:36,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=1246, Unknown=4, NotChecked=0, Total=1560 [2022-04-06 21:21:36,582 INFO L87 Difference]: Start difference. First operand 1243 states and 1790 transitions. Second operand has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 21:21:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:39,237 INFO L93 Difference]: Finished difference Result 1350 states and 1938 transitions. [2022-04-06 21:21:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-04-06 21:21:39,239 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 130 [2022-04-06 21:21:39,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:39,248 INFO L225 Difference]: With dead ends: 1350 [2022-04-06 21:21:39,248 INFO L226 Difference]: Without dead ends: 1347 [2022-04-06 21:21:39,249 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 217 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=457, Invalid=1891, Unknown=4, NotChecked=0, Total=2352 [2022-04-06 21:21:39,249 INFO L913 BasicCegarLoop]: 56 mSDtfsCounter, 80 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 1502 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 1610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:39,249 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 467 Invalid, 1610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1502 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 21:21:39,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-04-06 21:21:39,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1248. [2022-04-06 21:21:39,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 700 states have (on average 1.2157142857142857) internal successors, (851), 727 states have internal predecessors, (851), 473 states have call successors, (473), 75 states have call predecessors, (473), 74 states have return successors, (471), 445 states have call predecessors, (471), 471 states have call successors, (471) [2022-04-06 21:21:39,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 1795 transitions. [2022-04-06 21:21:39,666 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 1795 transitions. Word has length 130 [2022-04-06 21:21:39,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:39,666 INFO L478 AbstractCegarLoop]: Abstraction has 1248 states and 1795 transitions. [2022-04-06 21:21:39,666 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 states have internal predecessors, (45), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 21:21:39,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 1795 transitions. [2022-04-06 21:21:39,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 21:21:39,668 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:39,668 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:21:39,685 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-04-06 21:21:39,883 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-04-06 21:21:39,883 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash 952918391, now seen corresponding path program 31 times [2022-04-06 21:21:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:39,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1023506143] [2022-04-06 21:21:39,884 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:21:39,884 INFO L85 PathProgramCache]: Analyzing trace with hash 952918391, now seen corresponding path program 32 times [2022-04-06 21:21:39,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:39,884 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024002433] [2022-04-06 21:21:39,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:39,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:39,890 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:39,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090860788] [2022-04-06 21:21:39,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:21:39,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:39,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:39,892 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:21:39,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-04-06 21:21:39,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:21:39,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:39,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 100 conjunts are in the unsatisfiable core [2022-04-06 21:21:39,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 107 proven. 114 refuted. 0 times theorem prover too weak. 367 trivial. 0 not checked. [2022-04-06 21:21:42,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:21:44,615 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:21:46,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:21:46,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024002433] [2022-04-06 21:21:46,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:21:46,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090860788] [2022-04-06 21:21:46,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090860788] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:21:46,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:21:46,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2022-04-06 21:21:46,135 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:21:46,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1023506143] [2022-04-06 21:21:46,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1023506143] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:21:46,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:21:46,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-04-06 21:21:46,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684441683] [2022-04-06 21:21:46,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:21:46,136 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-04-06 21:21:46,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:46,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-04-06 21:21:46,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-04-06 21:21:46,137 INFO L87 Difference]: Start difference. First operand 1248 states and 1795 transitions. Second operand has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 21:21:49,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:21:49,561 INFO L93 Difference]: Finished difference Result 1320 states and 1894 transitions. [2022-04-06 21:21:49,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:21:49,563 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 132 [2022-04-06 21:21:49,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:21:49,567 INFO L225 Difference]: With dead ends: 1320 [2022-04-06 21:21:49,567 INFO L226 Difference]: Without dead ends: 1317 [2022-04-06 21:21:49,568 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=206, Invalid=1686, Unknown=0, NotChecked=0, Total=1892 [2022-04-06 21:21:49,568 INFO L913 BasicCegarLoop]: 60 mSDtfsCounter, 86 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 1478 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 249 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:21:49,568 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 504 Invalid, 1824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1478 Invalid, 0 Unknown, 249 Unchecked, 1.4s Time] [2022-04-06 21:21:49,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1317 states. [2022-04-06 21:21:49,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1317 to 1286. [2022-04-06 21:21:49,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1286 states, 720 states have (on average 1.2166666666666666) internal successors, (876), 747 states have internal predecessors, (876), 489 states have call successors, (489), 77 states have call predecessors, (489), 76 states have return successors, (487), 461 states have call predecessors, (487), 487 states have call successors, (487) [2022-04-06 21:21:49,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1286 states to 1286 states and 1852 transitions. [2022-04-06 21:21:49,991 INFO L78 Accepts]: Start accepts. Automaton has 1286 states and 1852 transitions. Word has length 132 [2022-04-06 21:21:49,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:21:49,992 INFO L478 AbstractCegarLoop]: Abstraction has 1286 states and 1852 transitions. [2022-04-06 21:21:49,992 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 21:21:49,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1286 states and 1852 transitions. [2022-04-06 21:21:49,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-04-06 21:21:49,993 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:21:49,993 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:21:50,010 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-04-06 21:21:50,198 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:50,199 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:21:50,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:21:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1531518263, now seen corresponding path program 33 times [2022-04-06 21:21:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:21:50,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [401478838] [2022-04-06 21:21:50,199 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:21:50,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1531518263, now seen corresponding path program 34 times [2022-04-06 21:21:50,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:21:50,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847764773] [2022-04-06 21:21:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:21:50,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:21:50,204 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:21:50,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [352868714] [2022-04-06 21:21:50,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:21:50,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:21:50,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:21:50,207 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:21:50,208 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-04-06 21:21:50,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:21:50,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:21:50,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 121 conjunts are in the unsatisfiable core [2022-04-06 21:21:50,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:21:50,946 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:21:50,949 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:21:50,975 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:21:51,018 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:21:51,056 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:21:51,244 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:21:51,327 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:21:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 162 proven. 107 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-04-06 21:21:54,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:22:00,729 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 185 proven. 17 refuted. 0 times theorem prover too weak. 386 trivial. 0 not checked. [2022-04-06 21:22:00,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:22:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847764773] [2022-04-06 21:22:00,730 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:22:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352868714] [2022-04-06 21:22:00,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352868714] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:22:00,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:22:00,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 16] total 37 [2022-04-06 21:22:00,730 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:22:00,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [401478838] [2022-04-06 21:22:00,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [401478838] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:22:00,730 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:22:00,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:22:00,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291305578] [2022-04-06 21:22:00,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:22:00,731 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:22:00,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:22:00,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:22:00,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1130, Unknown=0, NotChecked=0, Total=1332 [2022-04-06 21:22:00,731 INFO L87 Difference]: Start difference. First operand 1286 states and 1852 transitions. Second operand has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 21:22:02,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:22:02,868 INFO L93 Difference]: Finished difference Result 1403 states and 2026 transitions. [2022-04-06 21:22:02,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 21:22:02,869 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) Word has length 132 [2022-04-06 21:22:02,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:22:02,874 INFO L225 Difference]: With dead ends: 1403 [2022-04-06 21:22:02,874 INFO L226 Difference]: Without dead ends: 1396 [2022-04-06 21:22:02,875 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 224 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=254, Invalid=1552, Unknown=0, NotChecked=0, Total=1806 [2022-04-06 21:22:02,876 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 80 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 1043 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 1916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 805 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 21:22:02,876 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 627 Invalid, 1916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1043 Invalid, 0 Unknown, 805 Unchecked, 1.0s Time] [2022-04-06 21:22:02,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2022-04-06 21:22:03,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1316. [2022-04-06 21:22:03,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1316 states, 740 states have (on average 1.2148648648648648) internal successors, (899), 767 states have internal predecessors, (899), 499 states have call successors, (499), 78 states have call predecessors, (499), 76 states have return successors, (497), 470 states have call predecessors, (497), 497 states have call successors, (497) [2022-04-06 21:22:03,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1316 states to 1316 states and 1895 transitions. [2022-04-06 21:22:03,351 INFO L78 Accepts]: Start accepts. Automaton has 1316 states and 1895 transitions. Word has length 132 [2022-04-06 21:22:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:22:03,351 INFO L478 AbstractCegarLoop]: Abstraction has 1316 states and 1895 transitions. [2022-04-06 21:22:03,351 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 21:22:03,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1316 states and 1895 transitions. [2022-04-06 21:22:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 21:22:03,352 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:22:03,353 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-04-06 21:22:03,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-04-06 21:22:03,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-04-06 21:22:03,586 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:22:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:22:03,586 INFO L85 PathProgramCache]: Analyzing trace with hash -951009141, now seen corresponding path program 35 times [2022-04-06 21:22:03,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:22:03,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1475635686] [2022-04-06 21:22:03,587 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:22:03,587 INFO L85 PathProgramCache]: Analyzing trace with hash -951009141, now seen corresponding path program 36 times [2022-04-06 21:22:03,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:22:03,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582433722] [2022-04-06 21:22:03,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:22:03,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:22:03,593 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:22:03,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465419490] [2022-04-06 21:22:03,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:22:03,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:22:03,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:22:03,594 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:22:03,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-04-06 21:22:03,745 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-04-06 21:22:03,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:22:03,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 115 conjunts are in the unsatisfiable core [2022-04-06 21:22:03,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:22:07,085 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 45 proven. 158 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2022-04-06 21:22:07,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:22:14,609 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:22:14,614 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 21:22:19,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:22:19,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582433722] [2022-04-06 21:22:19,602 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:22:19,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465419490] [2022-04-06 21:22:19,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465419490] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:22:19,602 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:22:19,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2022-04-06 21:22:19,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:22:19,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1475635686] [2022-04-06 21:22:19,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1475635686] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:22:19,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:22:19,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-04-06 21:22:19,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183120965] [2022-04-06 21:22:19,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:22:19,603 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-04-06 21:22:19,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:22:19,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-04-06 21:22:19,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1443, Unknown=1, NotChecked=0, Total=1640 [2022-04-06 21:22:19,604 INFO L87 Difference]: Start difference. First operand 1316 states and 1895 transitions. Second operand has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 21:22:26,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:22:26,266 INFO L93 Difference]: Finished difference Result 1441 states and 2064 transitions. [2022-04-06 21:22:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-04-06 21:22:26,268 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) Word has length 135 [2022-04-06 21:22:26,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:22:26,273 INFO L225 Difference]: With dead ends: 1441 [2022-04-06 21:22:26,273 INFO L226 Difference]: Without dead ends: 1438 [2022-04-06 21:22:26,274 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=396, Invalid=2909, Unknown=1, NotChecked=0, Total=3306 [2022-04-06 21:22:26,274 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 112 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 2226 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 2349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 2226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:22:26,274 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 593 Invalid, 2349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 2226 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-04-06 21:22:26,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-04-06 21:22:26,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1398. [2022-04-06 21:22:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1398 states, 787 states have (on average 1.213468869123253) internal successors, (955), 815 states have internal predecessors, (955), 529 states have call successors, (529), 83 states have call predecessors, (529), 81 states have return successors, (527), 499 states have call predecessors, (527), 527 states have call successors, (527) [2022-04-06 21:22:26,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1398 states to 1398 states and 2011 transitions. [2022-04-06 21:22:26,814 INFO L78 Accepts]: Start accepts. Automaton has 1398 states and 2011 transitions. Word has length 135 [2022-04-06 21:22:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:22:26,815 INFO L478 AbstractCegarLoop]: Abstraction has 1398 states and 2011 transitions. [2022-04-06 21:22:26,815 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 24 states have internal predecessors, (53), 9 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2022-04-06 21:22:26,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1398 states and 2011 transitions. [2022-04-06 21:22:26,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-04-06 21:22:26,816 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:22:26,817 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2022-04-06 21:22:26,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-04-06 21:22:27,033 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-04-06 21:22:27,033 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:22:27,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:22:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash 849199701, now seen corresponding path program 37 times [2022-04-06 21:22:27,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:22:27,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [865599197] [2022-04-06 21:22:27,034 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:22:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash 849199701, now seen corresponding path program 38 times [2022-04-06 21:22:27,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:22:27,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033005109] [2022-04-06 21:22:27,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:22:27,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:22:27,039 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:22:27,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117924699] [2022-04-06 21:22:27,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:22:27,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:22:27,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:22:27,040 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:22:27,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-04-06 21:22:27,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:22:27,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:22:27,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 128 conjunts are in the unsatisfiable core [2022-04-06 21:22:27,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:22:28,428 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 99 proven. 182 refuted. 0 times theorem prover too weak. 319 trivial. 0 not checked. [2022-04-06 21:22:28,428 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:22:31,531 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 170 proven. 52 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-04-06 21:22:31,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:22:31,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033005109] [2022-04-06 21:22:31,533 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:22:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117924699] [2022-04-06 21:22:31,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117924699] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:22:31,533 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:22:31,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 34 [2022-04-06 21:22:31,533 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:22:31,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [865599197] [2022-04-06 21:22:31,533 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [865599197] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:22:31,533 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:22:31,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-04-06 21:22:31,533 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839493746] [2022-04-06 21:22:31,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:22:31,539 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-04-06 21:22:31,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:22:31,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-04-06 21:22:31,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:22:31,540 INFO L87 Difference]: Start difference. First operand 1398 states and 2011 transitions. Second operand has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 21:22:33,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:22:33,936 INFO L93 Difference]: Finished difference Result 1524 states and 2180 transitions. [2022-04-06 21:22:33,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-04-06 21:22:33,937 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) Word has length 135 [2022-04-06 21:22:33,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:22:33,942 INFO L225 Difference]: With dead ends: 1524 [2022-04-06 21:22:33,942 INFO L226 Difference]: Without dead ends: 1521 [2022-04-06 21:22:33,942 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 233 SyntacticMatches, 4 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=320, Invalid=1660, Unknown=0, NotChecked=0, Total=1980 [2022-04-06 21:22:33,942 INFO L913 BasicCegarLoop]: 61 mSDtfsCounter, 102 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1900 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 2050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1900 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-04-06 21:22:33,943 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 543 Invalid, 2050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1900 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-04-06 21:22:33,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2022-04-06 21:22:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1474. [2022-04-06 21:22:34,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1474 states, 830 states have (on average 1.2132530120481928) internal successors, (1007), 860 states have internal predecessors, (1007), 557 states have call successors, (557), 88 states have call predecessors, (557), 86 states have return successors, (555), 525 states have call predecessors, (555), 555 states have call successors, (555) [2022-04-06 21:22:34,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2119 transitions. [2022-04-06 21:22:34,489 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2119 transitions. Word has length 135 [2022-04-06 21:22:34,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:22:34,489 INFO L478 AbstractCegarLoop]: Abstraction has 1474 states and 2119 transitions. [2022-04-06 21:22:34,489 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 5 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 21:22:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2119 transitions. [2022-04-06 21:22:34,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-04-06 21:22:34,491 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:22:34,491 INFO L499 BasicCegarLoop]: trace histogram [18, 17, 17, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:22:34,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-04-06 21:22:34,693 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-04-06 21:22:34,693 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:22:34,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:22:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash 896657662, now seen corresponding path program 5 times [2022-04-06 21:22:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:22:34,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1676224967] [2022-04-06 21:22:34,694 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:22:34,694 INFO L85 PathProgramCache]: Analyzing trace with hash 896657662, now seen corresponding path program 6 times [2022-04-06 21:22:34,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:22:34,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751847602] [2022-04-06 21:22:34,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:22:34,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:22:34,702 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:22:34,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057267628] [2022-04-06 21:22:34,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:22:34,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:22:34,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:22:34,704 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:22:34,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-04-06 21:22:35,912 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 21:22:35,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:22:35,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 77 conjunts are in the unsatisfiable core [2022-04-06 21:22:35,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:22:38,716 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 168 proven. 76 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2022-04-06 21:22:38,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:22:46,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:22:46,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751847602] [2022-04-06 21:22:46,725 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:22:46,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057267628] [2022-04-06 21:22:46,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057267628] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 21:22:46,725 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 21:22:46,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2022-04-06 21:22:46,726 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:22:46,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1676224967] [2022-04-06 21:22:46,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1676224967] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:22:46,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:22:46,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-04-06 21:22:46,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571707729] [2022-04-06 21:22:46,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:22:46,726 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-04-06 21:22:46,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:22:46,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-04-06 21:22:46,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=738, Unknown=1, NotChecked=0, Total=870 [2022-04-06 21:22:46,727 INFO L87 Difference]: Start difference. First operand 1474 states and 2119 transitions. Second operand has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:22:57,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:22:57,742 INFO L93 Difference]: Finished difference Result 1884 states and 2783 transitions. [2022-04-06 21:22:57,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-04-06 21:22:57,743 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) Word has length 140 [2022-04-06 21:22:57,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:22:57,757 INFO L225 Difference]: With dead ends: 1884 [2022-04-06 21:22:57,758 INFO L226 Difference]: Without dead ends: 1882 [2022-04-06 21:22:57,759 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 17.9s TimeCoverageRelationStatistics Valid=337, Invalid=1640, Unknown=3, NotChecked=0, Total=1980 [2022-04-06 21:22:57,759 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 85 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 165 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 21:22:57,759 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 235 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 568 Invalid, 0 Unknown, 165 Unchecked, 1.5s Time] [2022-04-06 21:22:57,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1882 states. [2022-04-06 21:22:58,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1882 to 1835. [2022-04-06 21:22:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1835 states, 992 states have (on average 1.2429435483870968) internal successors, (1233), 1023 states have internal predecessors, (1233), 750 states have call successors, (750), 93 states have call predecessors, (750), 92 states have return successors, (748), 718 states have call predecessors, (748), 748 states have call successors, (748) [2022-04-06 21:22:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1835 states to 1835 states and 2731 transitions. [2022-04-06 21:22:58,568 INFO L78 Accepts]: Start accepts. Automaton has 1835 states and 2731 transitions. Word has length 140 [2022-04-06 21:22:58,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:22:58,568 INFO L478 AbstractCegarLoop]: Abstraction has 1835 states and 2731 transitions. [2022-04-06 21:22:58,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 17 states have internal predecessors, (46), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 7 states have call successors, (16) [2022-04-06 21:22:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1835 states and 2731 transitions. [2022-04-06 21:22:58,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-04-06 21:22:58,570 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:22:58,571 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 7, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:22:58,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-04-06 21:22:58,776 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2022-04-06 21:22:58,777 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:22:58,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:22:58,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1519299520, now seen corresponding path program 39 times [2022-04-06 21:22:58,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:22:58,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [98530150] [2022-04-06 21:22:58,778 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:22:58,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1519299520, now seen corresponding path program 40 times [2022-04-06 21:22:58,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:22:58,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488042126] [2022-04-06 21:22:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:22:58,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:22:58,783 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:22:58,783 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829009343] [2022-04-06 21:22:58,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 21:22:58,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:22:58,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:22:58,784 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:22:58,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-04-06 21:22:58,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 21:22:58,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:22:58,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 113 conjunts are in the unsatisfiable core [2022-04-06 21:22:58,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:23:00,070 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-04-06 21:23:00,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:23:03,964 INFO L134 CoverageAnalysis]: Checked inductivity of 623 backedges. 159 proven. 22 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2022-04-06 21:23:03,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:23:03,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488042126] [2022-04-06 21:23:03,964 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:23:03,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829009343] [2022-04-06 21:23:03,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829009343] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:23:03,965 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:23:03,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 14] total 34 [2022-04-06 21:23:03,965 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:23:03,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [98530150] [2022-04-06 21:23:03,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [98530150] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:23:03,965 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:23:03,965 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-04-06 21:23:03,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386288384] [2022-04-06 21:23:03,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:23:03,966 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-04-06 21:23:03,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:23:03,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-04-06 21:23:03,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1015, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:23:03,966 INFO L87 Difference]: Start difference. First operand 1835 states and 2731 transitions. Second operand has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 21:23:09,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:23:09,254 INFO L93 Difference]: Finished difference Result 2081 states and 3089 transitions. [2022-04-06 21:23:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-04-06 21:23:09,255 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) Word has length 140 [2022-04-06 21:23:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:23:09,261 INFO L225 Difference]: With dead ends: 2081 [2022-04-06 21:23:09,261 INFO L226 Difference]: Without dead ends: 2074 [2022-04-06 21:23:09,261 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 246 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:23:09,262 INFO L913 BasicCegarLoop]: 70 mSDtfsCounter, 107 mSDsluCounter, 688 mSDsCounter, 0 mSdLazyCounter, 2719 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 2808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-04-06 21:23:09,262 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 758 Invalid, 2808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2719 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-04-06 21:23:09,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2074 states. [2022-04-06 21:23:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2074 to 1968. [2022-04-06 21:23:10,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1065 states have (on average 1.2422535211267605) internal successors, (1323), 1099 states have internal predecessors, (1323), 804 states have call successors, (804), 99 states have call predecessors, (804), 98 states have return successors, (802), 769 states have call predecessors, (802), 802 states have call successors, (802) [2022-04-06 21:23:10,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2929 transitions. [2022-04-06 21:23:10,125 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2929 transitions. Word has length 140 [2022-04-06 21:23:10,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:23:10,126 INFO L478 AbstractCegarLoop]: Abstraction has 1968 states and 2929 transitions. [2022-04-06 21:23:10,126 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.391304347826087) internal successors, (55), 23 states have internal predecessors, (55), 8 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 6 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 21:23:10,126 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2929 transitions. [2022-04-06 21:23:10,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-04-06 21:23:10,128 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:23:10,128 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:23:10,145 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-04-06 21:23:10,343 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:23:10,343 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:23:10,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:23:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1693649792, now seen corresponding path program 41 times [2022-04-06 21:23:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:23:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [847464313] [2022-04-06 21:23:10,344 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:23:10,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1693649792, now seen corresponding path program 42 times [2022-04-06 21:23:10,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:23:10,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501026251] [2022-04-06 21:23:10,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:23:10,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:23:10,349 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:23:10,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [302923831] [2022-04-06 21:23:10,349 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 21:23:10,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:23:10,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:23:10,353 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:23:10,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-04-06 21:23:10,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-04-06 21:23:10,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:23:10,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 73 conjunts are in the unsatisfiable core [2022-04-06 21:23:10,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 21:23:11,720 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 42 proven. 124 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-04-06 21:23:11,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 21:23:19,431 INFO L134 CoverageAnalysis]: Checked inductivity of 873 backedges. 42 proven. 124 refuted. 0 times theorem prover too weak. 707 trivial. 0 not checked. [2022-04-06 21:23:19,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 21:23:19,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501026251] [2022-04-06 21:23:19,432 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 21:23:19,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302923831] [2022-04-06 21:23:19,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302923831] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 21:23:19,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 21:23:19,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 34 [2022-04-06 21:23:19,432 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 21:23:19,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [847464313] [2022-04-06 21:23:19,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [847464313] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 21:23:19,433 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 21:23:19,433 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-04-06 21:23:19,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608527330] [2022-04-06 21:23:19,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 21:23:19,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-04-06 21:23:19,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 21:23:19,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-04-06 21:23:19,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=935, Unknown=0, NotChecked=0, Total=1122 [2022-04-06 21:23:19,434 INFO L87 Difference]: Start difference. First operand 1968 states and 2929 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-04-06 21:23:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 21:23:22,379 INFO L93 Difference]: Finished difference Result 2370 states and 3509 transitions. [2022-04-06 21:23:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-04-06 21:23:22,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) Word has length 144 [2022-04-06 21:23:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 21:23:22,386 INFO L225 Difference]: With dead ends: 2370 [2022-04-06 21:23:22,386 INFO L226 Difference]: Without dead ends: 2080 [2022-04-06 21:23:22,408 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 254 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=387, Invalid=1775, Unknown=0, NotChecked=0, Total=2162 [2022-04-06 21:23:22,409 INFO L913 BasicCegarLoop]: 63 mSDtfsCounter, 62 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 1124 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 1234 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-04-06 21:23:22,409 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 347 Invalid, 1234 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 1124 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-04-06 21:23:22,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2022-04-06 21:23:23,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2062. [2022-04-06 21:23:23,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 1116 states have (on average 1.2419354838709677) internal successors, (1386), 1153 states have internal predecessors, (1386), 843 states have call successors, (843), 103 states have call predecessors, (843), 102 states have return successors, (841), 805 states have call predecessors, (841), 841 states have call successors, (841) [2022-04-06 21:23:23,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 3070 transitions. [2022-04-06 21:23:23,362 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 3070 transitions. Word has length 144 [2022-04-06 21:23:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 21:23:23,364 INFO L478 AbstractCegarLoop]: Abstraction has 2062 states and 3070 transitions. [2022-04-06 21:23:23,364 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (25), 2 states have call predecessors, (25), 2 states have return successors, (23), 6 states have call predecessors, (23), 6 states have call successors, (23) [2022-04-06 21:23:23,364 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 3070 transitions. [2022-04-06 21:23:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-04-06 21:23:23,366 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 21:23:23,376 INFO L499 BasicCegarLoop]: trace histogram [21, 20, 20, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 21:23:23,393 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-04-06 21:23:23,584 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:23:23,584 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 21:23:23,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 21:23:23,584 INFO L85 PathProgramCache]: Analyzing trace with hash -269237538, now seen corresponding path program 43 times [2022-04-06 21:23:23,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 21:23:23,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1418132179] [2022-04-06 21:23:23,585 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 21:23:23,585 INFO L85 PathProgramCache]: Analyzing trace with hash -269237538, now seen corresponding path program 44 times [2022-04-06 21:23:23,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 21:23:23,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157911202] [2022-04-06 21:23:23,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 21:23:23,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 21:23:23,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 21:23:23,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [877686170] [2022-04-06 21:23:23,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 21:23:23,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 21:23:23,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 21:23:23,593 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-04-06 21:23:23,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-04-06 21:23:23,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 21:23:23,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 21:23:23,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 80 conjunts are in the unsatisfiable core [2022-04-06 21:23:23,662 INFO L286 TraceCheckSpWp]: Computing forward predicates...