/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-scaling/egcd-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-34549b5 [2022-04-06 22:25:13,489 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-04-06 22:25:13,491 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-04-06 22:25:13,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-04-06 22:25:13,556 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-04-06 22:25:13,557 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-04-06 22:25:13,558 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-04-06 22:25:13,558 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 22:25:13,568 INFO L113 SettingsManager]: Loading preferences was successful [2022-04-06 22:25:13,568 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-04-06 22:25:13,569 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-04-06 22:25:13,569 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-04-06 22:25:13,569 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-04-06 22:25:13,569 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-04-06 22:25:13,569 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-04-06 22:25:13,570 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-04-06 22:25:13,570 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-04-06 22:25:13,570 INFO L138 SettingsManager]: * Use constant arrays=true [2022-04-06 22:25:13,570 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-04-06 22:25:13,570 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-04-06 22:25:13,570 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-04-06 22:25:13,571 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-04-06 22:25:13,571 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-04-06 22:25:13,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:25:13,571 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-04-06 22:25:13,571 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-04-06 22:25:13,571 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-04-06 22:25:13,571 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-04-06 22:25:13,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-04-06 22:25:13,571 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-04-06 22:25:13,571 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-04-06 22:25:13,744 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-04-06 22:25:13,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-04-06 22:25:13,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-04-06 22:25:13,766 INFO L271 PluginConnector]: Initializing CDTParser... [2022-04-06 22:25:13,767 INFO L275 PluginConnector]: CDTParser initialized [2022-04-06 22:25:13,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c [2022-04-06 22:25:13,829 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8190665/29836a367cfe437a8e7996a9694540f2/FLAG2fa8949b4 [2022-04-06 22:25:14,164 INFO L306 CDTParser]: Found 1 translation units. [2022-04-06 22:25:14,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c [2022-04-06 22:25:14,170 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8190665/29836a367cfe437a8e7996a9694540f2/FLAG2fa8949b4 [2022-04-06 22:25:14,178 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1b8190665/29836a367cfe437a8e7996a9694540f2 [2022-04-06 22:25:14,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-04-06 22:25:14,181 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-04-06 22:25:14,183 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-04-06 22:25:14,183 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-04-06 22:25:14,186 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-04-06 22:25:14,186 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:25:14" (1/1) ... [2022-04-06 22:25:14,187 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2be3cbe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14, skipping insertion in model container [2022-04-06 22:25:14,187 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.04 10:25:14" (1/1) ... [2022-04-06 22:25:14,191 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-04-06 22:25:14,201 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-04-06 22:25:14,322 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c[489,502] [2022-04-06 22:25:14,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:25:14,339 INFO L203 MainTranslator]: Completed pre-run [2022-04-06 22:25:14,347 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd-ll_valuebound20.c[489,502] [2022-04-06 22:25:14,352 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-04-06 22:25:14,361 INFO L208 MainTranslator]: Completed translation [2022-04-06 22:25:14,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14 WrapperNode [2022-04-06 22:25:14,361 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-04-06 22:25:14,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-04-06 22:25:14,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-04-06 22:25:14,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-04-06 22:25:14,372 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14" (1/1) ... [2022-04-06 22:25:14,372 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14" (1/1) ... [2022-04-06 22:25:14,379 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14" (1/1) ... [2022-04-06 22:25:14,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14" (1/1) ... [2022-04-06 22:25:14,390 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14" (1/1) ... [2022-04-06 22:25:14,392 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14" (1/1) ... [2022-04-06 22:25:14,393 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14" (1/1) ... [2022-04-06 22:25:14,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-04-06 22:25:14,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-04-06 22:25:14,395 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-04-06 22:25:14,395 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-04-06 22:25:14,397 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14" (1/1) ... [2022-04-06 22:25:14,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-04-06 22:25:14,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:14,422 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 22:25:14,438 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 22:25:14,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-04-06 22:25:14,448 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-04-06 22:25:14,448 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-04-06 22:25:14,448 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-04-06 22:25:14,449 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-04-06 22:25:14,449 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-04-06 22:25:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-04-06 22:25:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-04-06 22:25:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-04-06 22:25:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-04-06 22:25:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-04-06 22:25:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-04-06 22:25:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-04-06 22:25:14,449 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-04-06 22:25:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-04-06 22:25:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-04-06 22:25:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-04-06 22:25:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-04-06 22:25:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-04-06 22:25:14,450 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-04-06 22:25:14,503 INFO L234 CfgBuilder]: Building ICFG [2022-04-06 22:25:14,504 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-04-06 22:25:14,627 INFO L275 CfgBuilder]: Performing block encoding [2022-04-06 22:25:14,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-04-06 22:25:14,632 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-04-06 22:25:14,636 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:25:14 BoogieIcfgContainer [2022-04-06 22:25:14,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-04-06 22:25:14,646 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-04-06 22:25:14,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-04-06 22:25:14,648 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-04-06 22:25:14,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.04 10:25:14" (1/3) ... [2022-04-06 22:25:14,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa8131d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:25:14, skipping insertion in model container [2022-04-06 22:25:14,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.04 10:25:14" (2/3) ... [2022-04-06 22:25:14,649 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa8131d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.04 10:25:14, skipping insertion in model container [2022-04-06 22:25:14,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.04 10:25:14" (3/3) ... [2022-04-06 22:25:14,650 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd-ll_valuebound20.c [2022-04-06 22:25:14,654 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-04-06 22:25:14,654 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-04-06 22:25:14,694 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-04-06 22:25:14,702 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 22:25:14,703 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-04-06 22:25:14,713 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-04-06 22:25:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 22:25:14,719 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:14,719 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:14,720 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:14,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:14,723 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 1 times [2022-04-06 22:25:14,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:14,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [35950168] [2022-04-06 22:25:14,737 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:14,737 INFO L85 PathProgramCache]: Analyzing trace with hash 870870740, now seen corresponding path program 2 times [2022-04-06 22:25:14,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:14,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956229014] [2022-04-06 22:25:14,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:14,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:25:14,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-04-06 22:25:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:25:14,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-04-06 22:25:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:25:14,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-04-06 22:25:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:25:14,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2022-04-06 22:25:14,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:25:14,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-04-06 22:25:14,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-04-06 22:25:14,903 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:25:14,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:14,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956229014] [2022-04-06 22:25:14,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956229014] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:14,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:14,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:25:14,906 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:14,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [35950168] [2022-04-06 22:25:14,907 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [35950168] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:14,907 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:14,907 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-04-06 22:25:14,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534918625] [2022-04-06 22:25:14,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:14,910 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-04-06 22:25:14,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:14,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-04-06 22:25:14,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-04-06 22:25:14,930 INFO L87 Difference]: Start difference. First operand has 37 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:25:15,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:15,013 INFO L93 Difference]: Finished difference Result 67 states and 105 transitions. [2022-04-06 22:25:15,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-04-06 22:25:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2022-04-06 22:25:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:15,022 INFO L225 Difference]: With dead ends: 67 [2022-04-06 22:25:15,022 INFO L226 Difference]: Without dead ends: 32 [2022-04-06 22:25:15,026 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 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 22:25:15,029 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:15,031 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 39 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:25:15,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-04-06 22:25:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-04-06 22:25:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 13 states have call successors, (13), 4 states have call predecessors, (13), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-04-06 22:25:15,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-04-06 22:25:15,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 33 [2022-04-06 22:25:15,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:15,060 INFO L478 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-04-06 22:25:15,060 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-04-06 22:25:15,060 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-04-06 22:25:15,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-04-06 22:25:15,061 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:15,061 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:15,062 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-04-06 22:25:15,062 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:15,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:15,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 1 times [2022-04-06 22:25:15,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:15,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1976683773] [2022-04-06 22:25:15,063 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:15,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1006914976, now seen corresponding path program 2 times [2022-04-06 22:25:15,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:15,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187309590] [2022-04-06 22:25:15,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:15,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:15,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:15,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1552340482] [2022-04-06 22:25:15,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:25:15,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:15,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:15,097 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 22:25:15,109 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 22:25:15,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-04-06 22:25:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:15,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:25:15,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:15,319 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:25:15,320 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:25:15,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:15,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187309590] [2022-04-06 22:25:15,320 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:15,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552340482] [2022-04-06 22:25:15,321 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552340482] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:15,321 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:15,321 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:15,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:15,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1976683773] [2022-04-06 22:25:15,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1976683773] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:15,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:15,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:15,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591145531] [2022-04-06 22:25:15,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:15,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:25:15,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:15,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:25:15,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:25:15,324 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 22:25:15,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:15,404 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2022-04-06 22:25:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:25:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 33 [2022-04-06 22:25:15,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:15,407 INFO L225 Difference]: With dead ends: 48 [2022-04-06 22:25:15,407 INFO L226 Difference]: Without dead ends: 46 [2022-04-06 22:25:15,409 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 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 22:25:15,410 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 7 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:15,410 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 143 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:25:15,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-04-06 22:25:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2022-04-06 22:25:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 23 states have internal predecessors, (26), 19 states have call successors, (19), 5 states have call predecessors, (19), 4 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 22:25:15,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 62 transitions. [2022-04-06 22:25:15,421 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 62 transitions. Word has length 33 [2022-04-06 22:25:15,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:15,421 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 62 transitions. [2022-04-06 22:25:15,421 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-04-06 22:25:15,421 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 62 transitions. [2022-04-06 22:25:15,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-04-06 22:25:15,422 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:15,422 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 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] [2022-04-06 22:25:15,442 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 22:25:15,631 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 22:25:15,631 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:15,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:15,632 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 1 times [2022-04-06 22:25:15,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:15,632 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [741489312] [2022-04-06 22:25:15,633 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:15,633 INFO L85 PathProgramCache]: Analyzing trace with hash -124657161, now seen corresponding path program 2 times [2022-04-06 22:25:15,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:15,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895031278] [2022-04-06 22:25:15,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:15,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:15,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:15,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484037300] [2022-04-06 22:25:15,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:25:15,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:15,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:15,671 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 22:25:15,673 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 22:25:15,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:25:15,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:15,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:25:15,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-04-06 22:25:15,832 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:25:15,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895031278] [2022-04-06 22:25:15,833 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484037300] [2022-04-06 22:25:15,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484037300] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:15,834 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:15,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:15,834 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:15,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [741489312] [2022-04-06 22:25:15,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [741489312] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:15,836 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:15,836 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:15,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422027559] [2022-04-06 22:25:15,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:15,837 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:25:15,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:15,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:25:15,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:25:15,838 INFO L87 Difference]: Start difference. First operand 45 states and 62 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 22:25:15,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:15,889 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2022-04-06 22:25:15,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:25:15,890 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 38 [2022-04-06 22:25:15,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:15,891 INFO L225 Difference]: With dead ends: 52 [2022-04-06 22:25:15,891 INFO L226 Difference]: Without dead ends: 50 [2022-04-06 22:25:15,891 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-04-06 22:25:15,892 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:15,892 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 140 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:25:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-04-06 22:25:15,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-04-06 22:25:15,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 26 states have internal predecessors, (29), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2022-04-06 22:25:15,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 65 transitions. [2022-04-06 22:25:15,901 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 65 transitions. Word has length 38 [2022-04-06 22:25:15,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:15,901 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 65 transitions. [2022-04-06 22:25:15,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-04-06 22:25:15,902 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 65 transitions. [2022-04-06 22:25:15,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-04-06 22:25:15,902 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:15,903 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:15,922 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 22:25:16,122 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 22:25:16,123 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:16,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:16,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 1 times [2022-04-06 22:25:16,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:16,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1583253823] [2022-04-06 22:25:16,124 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:16,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1732898944, now seen corresponding path program 2 times [2022-04-06 22:25:16,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:16,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044102694] [2022-04-06 22:25:16,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:16,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:16,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:16,136 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [520649855] [2022-04-06 22:25:16,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:25:16,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:16,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:16,137 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 22:25:16,138 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 22:25:16,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:25:16,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:16,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 9 conjunts are in the unsatisfiable core [2022-04-06 22:25:16,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:16,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-04-06 22:25:16,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:25:16,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044102694] [2022-04-06 22:25:16,280 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:16,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520649855] [2022-04-06 22:25:16,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520649855] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:16,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:16,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:16,281 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:16,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1583253823] [2022-04-06 22:25:16,281 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1583253823] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:16,281 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:16,281 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:16,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857550190] [2022-04-06 22:25:16,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:16,281 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:25:16,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:16,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:25:16,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:25:16,282 INFO L87 Difference]: Start difference. First operand 49 states and 65 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 22:25:16,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:16,335 INFO L93 Difference]: Finished difference Result 74 states and 105 transitions. [2022-04-06 22:25:16,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:25:16,335 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 43 [2022-04-06 22:25:16,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:16,338 INFO L225 Difference]: With dead ends: 74 [2022-04-06 22:25:16,338 INFO L226 Difference]: Without dead ends: 70 [2022-04-06 22:25:16,338 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 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 22:25:16,339 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 8 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:16,339 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 139 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:25:16,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-04-06 22:25:16,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-04-06 22:25:16,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 37 states have internal predecessors, (42), 30 states have call successors, (30), 7 states have call predecessors, (30), 6 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 22:25:16,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 98 transitions. [2022-04-06 22:25:16,351 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 98 transitions. Word has length 43 [2022-04-06 22:25:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:16,356 INFO L478 AbstractCegarLoop]: Abstraction has 70 states and 98 transitions. [2022-04-06 22:25:16,356 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (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 22:25:16,356 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 98 transitions. [2022-04-06 22:25:16,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-04-06 22:25:16,358 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:16,358 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:16,379 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 22:25:16,575 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 22:25:16,576 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:16,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:16,576 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 1 times [2022-04-06 22:25:16,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:16,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1598745995] [2022-04-06 22:25:16,577 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:16,577 INFO L85 PathProgramCache]: Analyzing trace with hash -301191846, now seen corresponding path program 2 times [2022-04-06 22:25:16,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:16,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418501114] [2022-04-06 22:25:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:16,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:16,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:16,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [246023195] [2022-04-06 22:25:16,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:25:16,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:16,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:16,590 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 22:25:16,591 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 22:25:16,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:25:16,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:16,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-04-06 22:25:16,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:16,691 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-04-06 22:25:16,691 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:25:16,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:16,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418501114] [2022-04-06 22:25:16,692 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:16,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246023195] [2022-04-06 22:25:16,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246023195] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:16,692 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:16,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:16,692 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:16,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1598745995] [2022-04-06 22:25:16,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1598745995] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:16,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:16,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:16,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28546359] [2022-04-06 22:25:16,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:16,693 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:25:16,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:16,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:25:16,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:25:16,694 INFO L87 Difference]: Start difference. First operand 70 states and 98 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 22:25:16,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:16,732 INFO L93 Difference]: Finished difference Result 76 states and 103 transitions. [2022-04-06 22:25:16,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:25:16,732 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 49 [2022-04-06 22:25:16,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:16,735 INFO L225 Difference]: With dead ends: 76 [2022-04-06 22:25:16,735 INFO L226 Difference]: Without dead ends: 74 [2022-04-06 22:25:16,735 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 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 22:25:16,738 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 5 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:16,738 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 139 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:25:16,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-04-06 22:25:16,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2022-04-06 22:25:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 36 states have (on average 1.25) internal successors, (45), 40 states have internal predecessors, (45), 30 states have call successors, (30), 8 states have call predecessors, (30), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2022-04-06 22:25:16,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 101 transitions. [2022-04-06 22:25:16,752 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 101 transitions. Word has length 49 [2022-04-06 22:25:16,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:16,753 INFO L478 AbstractCegarLoop]: Abstraction has 74 states and 101 transitions. [2022-04-06 22:25:16,753 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2022-04-06 22:25:16,753 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 101 transitions. [2022-04-06 22:25:16,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-04-06 22:25:16,753 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:16,754 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:16,771 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-04-06 22:25:16,971 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 22:25:16,971 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 1 times [2022-04-06 22:25:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:16,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1731803602] [2022-04-06 22:25:16,972 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1164909737, now seen corresponding path program 2 times [2022-04-06 22:25:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:16,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467154597] [2022-04-06 22:25:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:16,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:16,992 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:16,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [678205972] [2022-04-06 22:25:16,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:25:16,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:16,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:16,999 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 22:25:17,000 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 22:25:17,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:25:17,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:17,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 11 conjunts are in the unsatisfiable core [2022-04-06 22:25:17,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:17,183 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-04-06 22:25:17,187 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-04-06 22:25:17,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:17,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467154597] [2022-04-06 22:25:17,187 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:17,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678205972] [2022-04-06 22:25:17,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678205972] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:17,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:17,187 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:17,187 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:17,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1731803602] [2022-04-06 22:25:17,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1731803602] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:17,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:17,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:17,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741662106] [2022-04-06 22:25:17,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:17,188 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:25:17,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:17,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:25:17,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-04-06 22:25:17,189 INFO L87 Difference]: Start difference. First operand 74 states and 101 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 22:25:17,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:17,230 INFO L93 Difference]: Finished difference Result 84 states and 109 transitions. [2022-04-06 22:25:17,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:25:17,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2022-04-06 22:25:17,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:17,232 INFO L225 Difference]: With dead ends: 84 [2022-04-06 22:25:17,232 INFO L226 Difference]: Without dead ends: 81 [2022-04-06 22:25:17,233 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 46 SyntacticMatches, 1 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 22:25:17,233 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:17,233 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 146 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:25:17,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-04-06 22:25:17,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2022-04-06 22:25:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 45 states have internal predecessors, (51), 27 states have call successors, (27), 10 states have call predecessors, (27), 9 states have return successors, (24), 23 states have call predecessors, (24), 24 states have call successors, (24) [2022-04-06 22:25:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 102 transitions. [2022-04-06 22:25:17,241 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 102 transitions. Word has length 51 [2022-04-06 22:25:17,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:17,241 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 102 transitions. [2022-04-06 22:25:17,241 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 22:25:17,241 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 102 transitions. [2022-04-06 22:25:17,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-04-06 22:25:17,242 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:17,242 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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 22:25:17,259 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 22:25:17,449 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 22:25:17,450 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:17,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:17,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 1 times [2022-04-06 22:25:17,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:17,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [287101504] [2022-04-06 22:25:17,451 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:17,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1924168317, now seen corresponding path program 2 times [2022-04-06 22:25:17,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:17,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971236096] [2022-04-06 22:25:17,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:17,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:17,469 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:17,470 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [542927404] [2022-04-06 22:25:17,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:25:17,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:17,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:17,475 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 22:25:17,476 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 22:25:17,510 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:25:17,510 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:17,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 10 conjunts are in the unsatisfiable core [2022-04-06 22:25:17,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 22:25:17,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:17,768 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-04-06 22:25:17,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971236096] [2022-04-06 22:25:17,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542927404] [2022-04-06 22:25:17,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542927404] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:17,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:17,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-04-06 22:25:17,769 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [287101504] [2022-04-06 22:25:17,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [287101504] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:17,769 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:17,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-04-06 22:25:17,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090766594] [2022-04-06 22:25:17,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:17,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-04-06 22:25:17,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-04-06 22:25:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:25:17,771 INFO L87 Difference]: Start difference. First operand 79 states and 102 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 22:25:17,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:17,875 INFO L93 Difference]: Finished difference Result 88 states and 112 transitions. [2022-04-06 22:25:17,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:25:17,876 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 54 [2022-04-06 22:25:17,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:17,877 INFO L225 Difference]: With dead ends: 88 [2022-04-06 22:25:17,877 INFO L226 Difference]: Without dead ends: 84 [2022-04-06 22:25:17,877 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-04-06 22:25:17,878 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 14 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:17,878 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 129 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:25:17,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-04-06 22:25:17,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2022-04-06 22:25:17,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 49 states have internal predecessors, (53), 27 states have call successors, (27), 11 states have call predecessors, (27), 10 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-04-06 22:25:17,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 105 transitions. [2022-04-06 22:25:17,887 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 105 transitions. Word has length 54 [2022-04-06 22:25:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:17,887 INFO L478 AbstractCegarLoop]: Abstraction has 84 states and 105 transitions. [2022-04-06 22:25:17,888 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 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 22:25:17,888 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 105 transitions. [2022-04-06 22:25:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-04-06 22:25:17,888 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:17,888 INFO L499 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 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 22:25:17,911 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 22:25:18,103 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 22:25:18,104 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:18,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 3 times [2022-04-06 22:25:18,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:18,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2035112132] [2022-04-06 22:25:18,105 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:18,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1698149216, now seen corresponding path program 4 times [2022-04-06 22:25:18,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:18,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651986685] [2022-04-06 22:25:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:18,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:18,122 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:18,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [540656458] [2022-04-06 22:25:18,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:25:18,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:18,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:18,127 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 22:25:18,128 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 22:25:18,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:25:18,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:18,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 21 conjunts are in the unsatisfiable core [2022-04-06 22:25:18,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:25:18,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-04-06 22:25:18,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:18,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651986685] [2022-04-06 22:25:18,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:18,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540656458] [2022-04-06 22:25:18,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540656458] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:18,427 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:18,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 22:25:18,427 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:18,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2035112132] [2022-04-06 22:25:18,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2035112132] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:18,427 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:18,427 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:25:18,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756160384] [2022-04-06 22:25:18,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:18,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:25:18,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:18,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:25:18,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:25:18,428 INFO L87 Difference]: Start difference. First operand 84 states and 105 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:25:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:18,519 INFO L93 Difference]: Finished difference Result 118 states and 147 transitions. [2022-04-06 22:25:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:25:18,519 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 56 [2022-04-06 22:25:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:18,520 INFO L225 Difference]: With dead ends: 118 [2022-04-06 22:25:18,520 INFO L226 Difference]: Without dead ends: 116 [2022-04-06 22:25:18,520 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:25:18,521 INFO L913 BasicCegarLoop]: 50 mSDtfsCounter, 8 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:18,521 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 170 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:25:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-04-06 22:25:18,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 112. [2022-04-06 22:25:18,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.15625) internal successors, (74), 67 states have internal predecessors, (74), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (31), 29 states have call predecessors, (31), 31 states have call successors, (31) [2022-04-06 22:25:18,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-04-06 22:25:18,534 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 56 [2022-04-06 22:25:18,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:18,534 INFO L478 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-04-06 22:25:18,534 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-04-06 22:25:18,534 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-04-06 22:25:18,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-04-06 22:25:18,535 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:18,535 INFO L499 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 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 22:25:18,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-04-06 22:25:18,751 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 22:25:18,752 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:18,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 1 times [2022-04-06 22:25:18,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:18,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1964954561] [2022-04-06 22:25:18,752 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:18,752 INFO L85 PathProgramCache]: Analyzing trace with hash 888099957, now seen corresponding path program 2 times [2022-04-06 22:25:18,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:18,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875874533] [2022-04-06 22:25:18,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:18,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:18,761 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:18,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1044468934] [2022-04-06 22:25:18,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:25:18,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:18,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:18,762 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 22:25:18,763 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 22:25:18,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:25:18,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:18,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2022-04-06 22:25:18,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:18,967 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 22:25:18,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:19,072 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-04-06 22:25:19,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:19,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875874533] [2022-04-06 22:25:19,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:19,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044468934] [2022-04-06 22:25:19,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044468934] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:19,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:19,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2022-04-06 22:25:19,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:19,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1964954561] [2022-04-06 22:25:19,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1964954561] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:19,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:19,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-04-06 22:25:19,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672884440] [2022-04-06 22:25:19,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:19,074 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-04-06 22:25:19,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:19,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-04-06 22:25:19,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:25:19,074 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 22:25:19,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:19,161 INFO L93 Difference]: Finished difference Result 137 states and 178 transitions. [2022-04-06 22:25:19,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-04-06 22:25:19,162 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 61 [2022-04-06 22:25:19,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:19,163 INFO L225 Difference]: With dead ends: 137 [2022-04-06 22:25:19,163 INFO L226 Difference]: Without dead ends: 131 [2022-04-06 22:25:19,163 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:25:19,164 INFO L913 BasicCegarLoop]: 45 mSDtfsCounter, 8 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:19,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 160 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:25:19,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-04-06 22:25:19,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-04-06 22:25:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 73 states have (on average 1.178082191780822) internal successors, (86), 77 states have internal predecessors, (86), 42 states have call successors, (42), 16 states have call predecessors, (42), 15 states have return successors, (39), 37 states have call predecessors, (39), 39 states have call successors, (39) [2022-04-06 22:25:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 167 transitions. [2022-04-06 22:25:19,178 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 167 transitions. Word has length 61 [2022-04-06 22:25:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:19,178 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 167 transitions. [2022-04-06 22:25:19,179 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 22:25:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 167 transitions. [2022-04-06 22:25:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-04-06 22:25:19,179 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:19,179 INFO L499 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 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] [2022-04-06 22:25:19,196 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-04-06 22:25:19,396 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 22:25:19,397 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:19,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 1 times [2022-04-06 22:25:19,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:19,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [319190864] [2022-04-06 22:25:19,398 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash 2064127436, now seen corresponding path program 2 times [2022-04-06 22:25:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:19,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490550436] [2022-04-06 22:25:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:19,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:19,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:19,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [821293257] [2022-04-06 22:25:19,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:25:19,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:19,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:19,408 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 22:25:19,409 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 22:25:19,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:25:19,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:19,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 19 conjunts are in the unsatisfiable core [2022-04-06 22:25:19,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-04-06 22:25:19,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:19,754 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-04-06 22:25:19,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:19,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490550436] [2022-04-06 22:25:19,755 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:19,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821293257] [2022-04-06 22:25:19,755 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821293257] provided 1 perfect and 1 imperfect interpolant sequences [2022-04-06 22:25:19,755 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:25:19,755 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 8 [2022-04-06 22:25:19,755 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:19,755 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [319190864] [2022-04-06 22:25:19,756 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [319190864] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:19,756 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:19,756 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-04-06 22:25:19,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812337913] [2022-04-06 22:25:19,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:19,756 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-04-06 22:25:19,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:19,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-04-06 22:25:19,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-04-06 22:25:19,757 INFO L87 Difference]: Start difference. First operand 131 states and 167 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 22:25:19,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:19,800 INFO L93 Difference]: Finished difference Result 137 states and 172 transitions. [2022-04-06 22:25:19,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-04-06 22:25:19,801 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 69 [2022-04-06 22:25:19,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:19,803 INFO L225 Difference]: With dead ends: 137 [2022-04-06 22:25:19,803 INFO L226 Difference]: Without dead ends: 132 [2022-04-06 22:25:19,803 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 128 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-04-06 22:25:19,804 INFO L913 BasicCegarLoop]: 36 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:19,805 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 116 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-04-06 22:25:19,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-04-06 22:25:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-04-06 22:25:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 76 states have (on average 1.1578947368421053) internal successors, (88), 79 states have internal predecessors, (88), 39 states have call successors, (39), 17 states have call predecessors, (39), 16 states have return successors, (37), 35 states have call predecessors, (37), 37 states have call successors, (37) [2022-04-06 22:25:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 164 transitions. [2022-04-06 22:25:19,819 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 164 transitions. Word has length 69 [2022-04-06 22:25:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:19,819 INFO L478 AbstractCegarLoop]: Abstraction has 132 states and 164 transitions. [2022-04-06 22:25:19,819 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, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-04-06 22:25:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 164 transitions. [2022-04-06 22:25:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 22:25:19,820 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:19,820 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:19,839 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 22:25:20,032 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 22:25:20,032 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:20,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:20,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 5 times [2022-04-06 22:25:20,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:20,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [813632359] [2022-04-06 22:25:20,033 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:20,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1196252297, now seen corresponding path program 6 times [2022-04-06 22:25:20,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:20,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639784037] [2022-04-06 22:25:20,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:20,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:20,041 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:20,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [154348848] [2022-04-06 22:25:20,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:25:20,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:20,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:20,043 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 22:25:20,045 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 22:25:20,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:25:20,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:20,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 22:25:20,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:20,391 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 39 proven. 17 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 22:25:20,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 42 proven. 14 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 22:25:20,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:20,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639784037] [2022-04-06 22:25:20,916 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:20,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154348848] [2022-04-06 22:25:20,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154348848] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:20,916 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:20,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2022-04-06 22:25:20,916 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:20,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [813632359] [2022-04-06 22:25:20,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [813632359] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:20,916 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:20,916 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:25:20,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645124194] [2022-04-06 22:25:20,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:20,917 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:25:20,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:20,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:25:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:25:20,917 INFO L87 Difference]: Start difference. First operand 132 states and 164 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 22:25:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:21,217 INFO L93 Difference]: Finished difference Result 166 states and 206 transitions. [2022-04-06 22:25:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:25:21,218 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-04-06 22:25:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:21,219 INFO L225 Difference]: With dead ends: 166 [2022-04-06 22:25:21,219 INFO L226 Difference]: Without dead ends: 164 [2022-04-06 22:25:21,219 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:25:21,220 INFO L913 BasicCegarLoop]: 42 mSDtfsCounter, 19 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:21,220 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 168 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-04-06 22:25:21,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-04-06 22:25:21,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 150. [2022-04-06 22:25:21,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 91 states have internal predecessors, (101), 42 states have call successors, (42), 20 states have call predecessors, (42), 19 states have return successors, (40), 38 states have call predecessors, (40), 40 states have call successors, (40) [2022-04-06 22:25:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 183 transitions. [2022-04-06 22:25:21,232 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 183 transitions. Word has length 74 [2022-04-06 22:25:21,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:21,232 INFO L478 AbstractCegarLoop]: Abstraction has 150 states and 183 transitions. [2022-04-06 22:25:21,232 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 22:25:21,232 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 183 transitions. [2022-04-06 22:25:21,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-04-06 22:25:21,233 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:21,233 INFO L499 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:21,251 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 22:25:21,446 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 22:25:21,447 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:21,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:21,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 3 times [2022-04-06 22:25:21,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:21,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1606332416] [2022-04-06 22:25:21,448 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:21,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1712511605, now seen corresponding path program 4 times [2022-04-06 22:25:21,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:21,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152292962] [2022-04-06 22:25:21,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:21,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:21,455 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:21,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1096411636] [2022-04-06 22:25:21,455 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:25:21,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:21,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:21,456 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 22:25:21,457 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 22:25:21,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:25:21,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:21,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 38 conjunts are in the unsatisfiable core [2022-04-06 22:25:21,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:22,288 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 27 proven. 29 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-04-06 22:25:22,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:22,654 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:25:23,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:23,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152292962] [2022-04-06 22:25:23,322 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:23,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096411636] [2022-04-06 22:25:23,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096411636] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:25:23,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:25:23,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-04-06 22:25:23,322 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:23,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1606332416] [2022-04-06 22:25:23,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1606332416] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:23,322 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:23,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:25:23,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825959000] [2022-04-06 22:25:23,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:23,323 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:25:23,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:23,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:25:23,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:25:23,323 INFO L87 Difference]: Start difference. First operand 150 states and 183 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 22:25:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:24,200 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2022-04-06 22:25:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:25:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 74 [2022-04-06 22:25:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:24,202 INFO L225 Difference]: With dead ends: 184 [2022-04-06 22:25:24,202 INFO L226 Difference]: Without dead ends: 182 [2022-04-06 22:25:24,202 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:25:24,203 INFO L913 BasicCegarLoop]: 44 mSDtfsCounter, 15 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:24,203 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 196 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:25:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-04-06 22:25:24,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 168. [2022-04-06 22:25:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 100 states have (on average 1.14) internal successors, (114), 103 states have internal predecessors, (114), 45 states have call successors, (45), 23 states have call predecessors, (45), 22 states have return successors, (43), 41 states have call predecessors, (43), 43 states have call successors, (43) [2022-04-06 22:25:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 202 transitions. [2022-04-06 22:25:24,219 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 202 transitions. Word has length 74 [2022-04-06 22:25:24,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:24,220 INFO L478 AbstractCegarLoop]: Abstraction has 168 states and 202 transitions. [2022-04-06 22:25:24,220 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 22:25:24,220 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 202 transitions. [2022-04-06 22:25:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 22:25:24,220 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:24,221 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:24,239 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 22:25:24,438 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 22:25:24,438 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:24,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 5 times [2022-04-06 22:25:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:24,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [3123025] [2022-04-06 22:25:24,439 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:24,439 INFO L85 PathProgramCache]: Analyzing trace with hash 15858924, now seen corresponding path program 6 times [2022-04-06 22:25:24,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:24,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134596735] [2022-04-06 22:25:24,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:24,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:24,452 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:24,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111815160] [2022-04-06 22:25:24,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:25:24,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:24,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:24,453 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 22:25:24,454 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 22:25:24,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:25:24,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:24,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 26 conjunts are in the unsatisfiable core [2022-04-06 22:25:24,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:24,688 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2022-04-06 22:25:24,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 27 proven. 14 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2022-04-06 22:25:24,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:24,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134596735] [2022-04-06 22:25:24,877 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:24,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111815160] [2022-04-06 22:25:24,877 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111815160] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:24,877 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:24,877 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2022-04-06 22:25:24,878 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:24,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [3123025] [2022-04-06 22:25:24,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [3123025] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:24,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:24,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-04-06 22:25:24,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070538808] [2022-04-06 22:25:24,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:24,878 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-04-06 22:25:24,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:24,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-04-06 22:25:24,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-04-06 22:25:24,879 INFO L87 Difference]: Start difference. First operand 168 states and 202 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 22:25:25,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:25,152 INFO L93 Difference]: Finished difference Result 182 states and 221 transitions. [2022-04-06 22:25:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:25:25,153 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 79 [2022-04-06 22:25:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:25,154 INFO L225 Difference]: With dead ends: 182 [2022-04-06 22:25:25,154 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 22:25:25,155 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 145 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-04-06 22:25:25,155 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:25,155 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 148 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-04-06 22:25:25,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 22:25:25,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 149. [2022-04-06 22:25:25,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 91 states have (on average 1.0879120879120878) internal successors, (99), 95 states have internal predecessors, (99), 36 states have call successors, (36), 22 states have call predecessors, (36), 21 states have return successors, (35), 31 states have call predecessors, (35), 35 states have call successors, (35) [2022-04-06 22:25:25,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 170 transitions. [2022-04-06 22:25:25,179 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 170 transitions. Word has length 79 [2022-04-06 22:25:25,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:25,180 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 170 transitions. [2022-04-06 22:25:25,180 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2022-04-06 22:25:25,180 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 170 transitions. [2022-04-06 22:25:25,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-04-06 22:25:25,180 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:25,181 INFO L499 BasicCegarLoop]: trace histogram [9, 8, 8, 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, 1, 1] [2022-04-06 22:25:25,200 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 22:25:25,395 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 22:25:25,395 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:25,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 3 times [2022-04-06 22:25:25,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:25,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1240998693] [2022-04-06 22:25:25,396 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:25,396 INFO L85 PathProgramCache]: Analyzing trace with hash 2066842922, now seen corresponding path program 4 times [2022-04-06 22:25:25,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:25,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977303853] [2022-04-06 22:25:25,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:25,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:25,403 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:25,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [228332823] [2022-04-06 22:25:25,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:25:25,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:25,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:25,405 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 22:25:25,406 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 22:25:25,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:25:25,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:25,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 36 conjunts are in the unsatisfiable core [2022-04-06 22:25:25,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:25,967 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 36 proven. 24 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-04-06 22:25:25,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:26,309 INFO L134 CoverageAnalysis]: Checked inductivity of 166 backedges. 34 proven. 17 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2022-04-06 22:25:26,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977303853] [2022-04-06 22:25:26,309 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:26,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228332823] [2022-04-06 22:25:26,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228332823] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:26,309 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:26,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 18 [2022-04-06 22:25:26,310 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:26,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1240998693] [2022-04-06 22:25:26,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1240998693] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:26,310 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:26,310 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:25:26,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350337376] [2022-04-06 22:25:26,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:26,310 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:25:26,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:26,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:25:26,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:25:26,311 INFO L87 Difference]: Start difference. First operand 149 states and 170 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:25:26,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:26,756 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2022-04-06 22:25:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:25:26,757 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) Word has length 79 [2022-04-06 22:25:26,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:26,758 INFO L225 Difference]: With dead ends: 171 [2022-04-06 22:25:26,758 INFO L226 Difference]: Without dead ends: 169 [2022-04-06 22:25:26,758 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 140 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:25:26,758 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:26,758 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 164 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:25:26,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-04-06 22:25:26,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 159. [2022-04-06 22:25:26,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 97 states have (on average 1.092783505154639) internal successors, (106), 101 states have internal predecessors, (106), 39 states have call successors, (39), 23 states have call predecessors, (39), 22 states have return successors, (38), 34 states have call predecessors, (38), 38 states have call successors, (38) [2022-04-06 22:25:26,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 183 transitions. [2022-04-06 22:25:26,776 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 183 transitions. Word has length 79 [2022-04-06 22:25:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:26,776 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 183 transitions. [2022-04-06 22:25:26,777 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 5 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 5 states have call successors, (13) [2022-04-06 22:25:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 183 transitions. [2022-04-06 22:25:26,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 22:25:26,777 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:26,777 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:26,799 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 22:25:26,987 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 22:25:26,988 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:26,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 7 times [2022-04-06 22:25:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:26,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [136155906] [2022-04-06 22:25:26,988 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:26,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1804875380, now seen corresponding path program 8 times [2022-04-06 22:25:26,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:26,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754984907] [2022-04-06 22:25:26,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:26,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:26,995 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:26,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1603122342] [2022-04-06 22:25:26,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:25:26,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:26,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:26,996 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 22:25:26,997 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 22:25:27,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:25:27,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:27,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 51 conjunts are in the unsatisfiable core [2022-04-06 22:25:27,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:28,478 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2022-04-06 22:25:28,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:28,801 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-04-06 22:25:28,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:28,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754984907] [2022-04-06 22:25:28,802 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603122342] [2022-04-06 22:25:28,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603122342] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:28,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:28,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 22:25:28,802 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:28,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [136155906] [2022-04-06 22:25:28,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [136155906] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:28,802 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:28,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:25:28,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218905995] [2022-04-06 22:25:28,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:28,802 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:25:28,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:28,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:25:28,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:25:28,803 INFO L87 Difference]: Start difference. First operand 159 states and 183 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 22:25:29,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:29,847 INFO L93 Difference]: Finished difference Result 189 states and 221 transitions. [2022-04-06 22:25:29,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:25:29,848 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) Word has length 92 [2022-04-06 22:25:29,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:29,849 INFO L225 Difference]: With dead ends: 189 [2022-04-06 22:25:29,849 INFO L226 Difference]: Without dead ends: 187 [2022-04-06 22:25:29,849 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 165 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:25:29,850 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 24 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:29,850 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 156 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 22:25:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2022-04-06 22:25:29,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2022-04-06 22:25:29,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 113 states have (on average 1.0973451327433628) internal successors, (124), 118 states have internal predecessors, (124), 48 states have call successors, (48), 26 states have call predecessors, (48), 25 states have return successors, (47), 42 states have call predecessors, (47), 47 states have call successors, (47) [2022-04-06 22:25:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 219 transitions. [2022-04-06 22:25:29,874 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 219 transitions. Word has length 92 [2022-04-06 22:25:29,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:29,874 INFO L478 AbstractCegarLoop]: Abstraction has 187 states and 219 transitions. [2022-04-06 22:25:29,875 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2022-04-06 22:25:29,875 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 219 transitions. [2022-04-06 22:25:29,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 22:25:29,875 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:29,875 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:29,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-04-06 22:25:30,081 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 22:25:30,081 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:30,082 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 9 times [2022-04-06 22:25:30,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:30,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [739949466] [2022-04-06 22:25:30,082 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:30,082 INFO L85 PathProgramCache]: Analyzing trace with hash 65583604, now seen corresponding path program 10 times [2022-04-06 22:25:30,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:30,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268774058] [2022-04-06 22:25:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:30,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:30,089 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:30,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [402474712] [2022-04-06 22:25:30,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:25:30,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:30,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:30,090 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 22:25:30,091 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 22:25:30,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:25:30,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:30,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 56 conjunts are in the unsatisfiable core [2022-04-06 22:25:30,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 65 proven. 54 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-04-06 22:25:30,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 75 proven. 8 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-04-06 22:25:31,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:25:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268774058] [2022-04-06 22:25:31,182 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:25:31,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402474712] [2022-04-06 22:25:31,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402474712] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:25:31,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:25:31,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 22:25:31,183 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:25:31,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [739949466] [2022-04-06 22:25:31,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [739949466] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:25:31,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:25:31,183 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:25:31,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109921929] [2022-04-06 22:25:31,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:25:31,183 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:25:31,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:31,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:25:31,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:25:31,184 INFO L87 Difference]: Start difference. First operand 187 states and 219 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 22:25:31,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:25:31,617 INFO L93 Difference]: Finished difference Result 224 states and 261 transitions. [2022-04-06 22:25:31,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:25:31,617 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) Word has length 92 [2022-04-06 22:25:31,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:25:31,618 INFO L225 Difference]: With dead ends: 224 [2022-04-06 22:25:31,618 INFO L226 Difference]: Without dead ends: 222 [2022-04-06 22:25:31,619 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:25:31,619 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 23 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:25:31,619 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 177 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:25:31,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-04-06 22:25:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2022-04-06 22:25:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 136 states have (on average 1.1029411764705883) internal successors, (150), 140 states have internal predecessors, (150), 55 states have call successors, (55), 31 states have call predecessors, (55), 30 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-04-06 22:25:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 259 transitions. [2022-04-06 22:25:31,651 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 259 transitions. Word has length 92 [2022-04-06 22:25:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:25:31,651 INFO L478 AbstractCegarLoop]: Abstraction has 222 states and 259 transitions. [2022-04-06 22:25:31,652 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 6 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 6 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 22:25:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 259 transitions. [2022-04-06 22:25:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-04-06 22:25:31,652 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:25:31,652 INFO L499 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:25:31,671 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 22:25:31,853 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 22:25:31,853 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:25:31,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:25:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 11 times [2022-04-06 22:25:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:25:31,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [17304117] [2022-04-06 22:25:31,854 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:25:31,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1451786998, now seen corresponding path program 12 times [2022-04-06 22:25:31,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:25:31,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273717262] [2022-04-06 22:25:31,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:25:31,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:25:31,860 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:25:31,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475208963] [2022-04-06 22:25:31,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:25:31,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:25:31,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:25:31,861 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 22:25:31,862 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 22:25:31,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:25:31,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:25:31,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2022-04-06 22:25:31,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:25:32,144 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:25:32,146 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:25:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 70 proven. 11 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-04-06 22:25:34,653 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:25:36,847 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:26:49,190 WARN L855 $PredicateComparison]: unable to prove that (forall ((v_main_~s~0_BEFORE_CALL_115 Int) (v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0)))) (not (= (* v_main_~s~0_BEFORE_CALL_115 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_115) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1))))) is different from true [2022-04-06 22:27:51,334 WARN L855 $PredicateComparison]: unable to prove that (or (forall ((v_main_~s~0_BEFORE_CALL_115 Int) (v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (or (and (not (= |c___VERIFIER_assert_#in~cond| 0)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0)))) (not (= (* v_main_~s~0_BEFORE_CALL_115 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_115) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1))))) (= c___VERIFIER_assert_~cond 0)) is different from true [2022-04-06 22:28:09,379 WARN L855 $PredicateComparison]: unable to prove that (or (not (= |c___VERIFIER_assert_#in~cond| 1)) (forall ((v_main_~s~0_BEFORE_CALL_115 Int) (v_main_~r~0_BEFORE_CALL_121 Int) (v_main_~p~0_BEFORE_CALL_124 Int) (v_main_~q~0_BEFORE_CALL_121 Int)) (let ((.cse0 (+ (* v_main_~r~0_BEFORE_CALL_121 v_main_~q~0_BEFORE_CALL_121) 1))) (or (not (= (* v_main_~s~0_BEFORE_CALL_115 (+ v_main_~p~0_BEFORE_CALL_124 (* (- 1) v_main_~q~0_BEFORE_CALL_121))) (+ (* (+ (* (- 1) v_main_~s~0_BEFORE_CALL_115) v_main_~r~0_BEFORE_CALL_121) v_main_~q~0_BEFORE_CALL_121) 1))) (= (mod .cse0 v_main_~p~0_BEFORE_CALL_124) 0) (= .cse0 0))))) is different from true [2022-04-06 22:28:29,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:28:29,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273717262] [2022-04-06 22:28:29,174 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:28:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475208963] [2022-04-06 22:28:29,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475208963] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:28:29,175 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:28:29,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 22:28:29,175 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:28:29,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [17304117] [2022-04-06 22:28:29,175 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [17304117] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:28:29,175 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:28:29,175 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:28:29,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616713929] [2022-04-06 22:28:29,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:28:29,175 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:28:29,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:29,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:28:29,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=188, Unknown=9, NotChecked=90, Total=342 [2022-04-06 22:28:29,176 INFO L87 Difference]: Start difference. First operand 222 states and 259 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 22:28:31,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:28:50,335 WARN L232 SmtUtils]: Spent 18.27s on a formula simplification. DAG size of input: 47 DAG size of output: 44 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:28:52,970 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:28:53,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:28:53,097 INFO L93 Difference]: Finished difference Result 254 states and 300 transitions. [2022-04-06 22:28:53,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:28:53,097 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) Word has length 92 [2022-04-06 22:28:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:28:53,099 INFO L225 Difference]: With dead ends: 254 [2022-04-06 22:28:53,099 INFO L226 Difference]: Without dead ends: 252 [2022-04-06 22:28:53,099 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 51.7s TimeCoverageRelationStatistics Valid=76, Invalid=269, Unknown=9, NotChecked=108, Total=462 [2022-04-06 22:28:53,099 INFO L913 BasicCegarLoop]: 33 mSDtfsCounter, 16 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 10 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:28:53,099 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 160 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 209 Invalid, 2 Unknown, 0 Unchecked, 5.0s Time] [2022-04-06 22:28:53,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-04-06 22:28:53,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 226. [2022-04-06 22:28:53,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 138 states have (on average 1.0942028985507246) internal successors, (151), 144 states have internal predecessors, (151), 56 states have call successors, (56), 32 states have call predecessors, (56), 31 states have return successors, (55), 49 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 22:28:53,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 262 transitions. [2022-04-06 22:28:53,134 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 262 transitions. Word has length 92 [2022-04-06 22:28:53,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:28:53,135 INFO L478 AbstractCegarLoop]: Abstraction has 226 states and 262 transitions. [2022-04-06 22:28:53,135 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 3 states have call successors, (10) [2022-04-06 22:28:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 262 transitions. [2022-04-06 22:28:53,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 22:28:53,136 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:28:53,136 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:28:53,153 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 22:28:53,347 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 22:28:53,347 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:28:53,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:28:53,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 13 times [2022-04-06 22:28:53,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:28:53,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1657147288] [2022-04-06 22:28:53,348 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:28:53,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1963826657, now seen corresponding path program 14 times [2022-04-06 22:28:53,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:28:53,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336271202] [2022-04-06 22:28:53,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:28:53,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:28:53,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:28:53,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033947774] [2022-04-06 22:28:53,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:28:53,355 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:28:53,355 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:28:53,356 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 22:28:53,357 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 22:28:53,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:28:53,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:28:53,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 22:28:53,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:29:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 45 proven. 37 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-04-06 22:29:06,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:29:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 214 trivial. 0 not checked. [2022-04-06 22:29:07,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:29:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336271202] [2022-04-06 22:29:07,366 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:29:07,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033947774] [2022-04-06 22:29:07,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033947774] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:29:07,366 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:29:07,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2022-04-06 22:29:07,367 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:29:07,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1657147288] [2022-04-06 22:29:07,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1657147288] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:29:07,367 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:29:07,367 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:29:07,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781808422] [2022-04-06 22:29:07,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:29:07,367 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:29:07,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:29:07,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:29:07,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:29:07,368 INFO L87 Difference]: Start difference. First operand 226 states and 262 transitions. Second operand has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 22:29:08,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:29:08,118 INFO L93 Difference]: Finished difference Result 248 states and 290 transitions. [2022-04-06 22:29:08,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-04-06 22:29:08,119 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) Word has length 97 [2022-04-06 22:29:08,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:29:08,120 INFO L225 Difference]: With dead ends: 248 [2022-04-06 22:29:08,120 INFO L226 Difference]: Without dead ends: 246 [2022-04-06 22:29:08,120 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 174 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:29:08,121 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 12 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-04-06 22:29:08,121 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 209 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 388 Invalid, 0 Unknown, 6 Unchecked, 0.6s Time] [2022-04-06 22:29:08,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-04-06 22:29:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-04-06 22:29:08,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 150 states have (on average 1.1) internal successors, (165), 156 states have internal predecessors, (165), 62 states have call successors, (62), 34 states have call predecessors, (62), 33 states have return successors, (61), 55 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 22:29:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 288 transitions. [2022-04-06 22:29:08,183 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 288 transitions. Word has length 97 [2022-04-06 22:29:08,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:29:08,183 INFO L478 AbstractCegarLoop]: Abstraction has 246 states and 288 transitions. [2022-04-06 22:29:08,183 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.25) internal successors, (27), 10 states have internal predecessors, (27), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 6 states have call predecessors, (16), 5 states have call successors, (16) [2022-04-06 22:29:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 288 transitions. [2022-04-06 22:29:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 22:29:08,184 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:29:08,184 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:29:08,203 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 22:29:08,399 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 22:29:08,400 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:29:08,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:29:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 15 times [2022-04-06 22:29:08,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:29:08,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1210241398] [2022-04-06 22:29:08,400 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:29:08,400 INFO L85 PathProgramCache]: Analyzing trace with hash 1451182689, now seen corresponding path program 16 times [2022-04-06 22:29:08,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:29:08,400 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547534576] [2022-04-06 22:29:08,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:29:08,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:29:08,406 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:29:08,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [155704428] [2022-04-06 22:29:08,407 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:29:08,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:29:08,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:29:08,408 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 22:29:08,408 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 22:29:08,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:29:08,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:29:08,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 22:29:08,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:29:09,203 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 76 proven. 57 refuted. 0 times theorem prover too weak. 163 trivial. 0 not checked. [2022-04-06 22:29:09,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:29:09,461 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 87 proven. 5 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 22:29:09,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:29:09,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547534576] [2022-04-06 22:29:09,462 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:29:09,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155704428] [2022-04-06 22:29:09,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155704428] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:29:09,462 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:29:09,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 19 [2022-04-06 22:29:09,462 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:29:09,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1210241398] [2022-04-06 22:29:09,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1210241398] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:29:09,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:29:09,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:29:09,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176987991] [2022-04-06 22:29:09,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:29:09,463 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:29:09,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:29:09,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:29:09,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:29:09,463 INFO L87 Difference]: Start difference. First operand 246 states and 288 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:29:10,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:29:10,472 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2022-04-06 22:29:10,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:29:10,473 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) Word has length 97 [2022-04-06 22:29:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:29:10,474 INFO L225 Difference]: With dead ends: 276 [2022-04-06 22:29:10,474 INFO L226 Difference]: Without dead ends: 274 [2022-04-06 22:29:10,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:29:10,475 INFO L913 BasicCegarLoop]: 31 mSDtfsCounter, 26 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 628 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:29:10,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 199 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 628 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 22:29:10,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-04-06 22:29:10,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 257. [2022-04-06 22:29:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 157 states have (on average 1.0955414012738853) internal successors, (172), 164 states have internal predecessors, (172), 64 states have call successors, (64), 36 states have call predecessors, (64), 35 states have return successors, (63), 56 states have call predecessors, (63), 63 states have call successors, (63) [2022-04-06 22:29:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 299 transitions. [2022-04-06 22:29:10,528 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 299 transitions. Word has length 97 [2022-04-06 22:29:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:29:10,528 INFO L478 AbstractCegarLoop]: Abstraction has 257 states and 299 transitions. [2022-04-06 22:29:10,528 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 6 states have call successors, (16) [2022-04-06 22:29:10,529 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 299 transitions. [2022-04-06 22:29:10,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-04-06 22:29:10,529 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:29:10,529 INFO L499 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:29:10,546 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 22:29:10,735 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 22:29:10,735 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:29:10,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:29:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 5 times [2022-04-06 22:29:10,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:29:10,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [644476908] [2022-04-06 22:29:10,736 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:29:10,736 INFO L85 PathProgramCache]: Analyzing trace with hash -792800609, now seen corresponding path program 6 times [2022-04-06 22:29:10,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:29:10,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079187976] [2022-04-06 22:29:10,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:29:10,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:29:10,741 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:29:10,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [131538469] [2022-04-06 22:29:10,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:29:10,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:29:10,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:29:10,743 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 22:29:10,750 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 22:29:10,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:29:10,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:29:10,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 29 conjunts are in the unsatisfiable core [2022-04-06 22:29:10,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:29:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 72 proven. 20 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-04-06 22:29:11,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:29:11,296 WARN L907 QuantifierPusher]: no eliminatee completely removed, nonetheless the elimination was considered successful [2022-04-06 22:29:15,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:29:15,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079187976] [2022-04-06 22:29:15,770 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:29:15,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131538469] [2022-04-06 22:29:15,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131538469] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:29:15,770 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:29:15,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-04-06 22:29:15,770 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:29:15,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [644476908] [2022-04-06 22:29:15,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [644476908] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:29:15,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:29:15,771 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:29:15,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562058301] [2022-04-06 22:29:15,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:29:15,771 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:29:15,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:29:15,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:29:15,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=165, Unknown=2, NotChecked=0, Total=210 [2022-04-06 22:29:15,771 INFO L87 Difference]: Start difference. First operand 257 states and 299 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 22:29:16,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:29:16,010 INFO L93 Difference]: Finished difference Result 276 states and 322 transitions. [2022-04-06 22:29:16,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:29:16,011 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 97 [2022-04-06 22:29:16,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:29:16,012 INFO L225 Difference]: With dead ends: 276 [2022-04-06 22:29:16,012 INFO L226 Difference]: Without dead ends: 274 [2022-04-06 22:29:16,012 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=66, Invalid=238, Unknown=2, NotChecked=0, Total=306 [2022-04-06 22:29:16,013 INFO L913 BasicCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:29:16,013 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 137 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-04-06 22:29:16,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-04-06 22:29:16,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 241. [2022-04-06 22:29:16,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 149 states have (on average 1.0939597315436242) internal successors, (163), 154 states have internal predecessors, (163), 57 states have call successors, (57), 35 states have call predecessors, (57), 34 states have return successors, (56), 51 states have call predecessors, (56), 56 states have call successors, (56) [2022-04-06 22:29:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 276 transitions. [2022-04-06 22:29:16,072 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 276 transitions. Word has length 97 [2022-04-06 22:29:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:29:16,072 INFO L478 AbstractCegarLoop]: Abstraction has 241 states and 276 transitions. [2022-04-06 22:29:16,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 4 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-04-06 22:29:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 276 transitions. [2022-04-06 22:29:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 22:29:16,073 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:29:16,073 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:29:16,080 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 22:29:16,278 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 22:29:16,278 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:29:16,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:29:16,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 17 times [2022-04-06 22:29:16,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:29:16,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [975470411] [2022-04-06 22:29:16,279 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:29:16,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1750450403, now seen corresponding path program 18 times [2022-04-06 22:29:16,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:29:16,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381968429] [2022-04-06 22:29:16,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:29:16,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:29:16,284 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:29:16,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1846122874] [2022-04-06 22:29:16,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:29:16,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:29:16,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:29:16,286 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 22:29:16,287 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 22:29:16,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:29:16,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:29:16,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 22:29:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:30:49,564 WARN L232 SmtUtils]: Spent 5.22s on a formula simplification. DAG size of input: 11 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 22:31:02,184 WARN L232 SmtUtils]: Spent 5.45s on a formula simplification. DAG size of input: 3 DAG size of output: 1 (called from [L1067] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2022-04-06 22:32:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 91 proven. 53 refuted. 0 times theorem prover too weak. 266 trivial. 0 not checked. [2022-04-06 22:32:51,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:09,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381968429] [2022-04-06 22:33:09,427 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:09,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846122874] [2022-04-06 22:33:09,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846122874] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:33:09,428 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:33:09,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-04-06 22:33:09,428 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:09,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [975470411] [2022-04-06 22:33:09,428 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [975470411] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:09,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:09,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:33:09,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896141828] [2022-04-06 22:33:09,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:09,428 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:33:09,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:33:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=463, Unknown=4, NotChecked=0, Total=552 [2022-04-06 22:33:09,430 INFO L87 Difference]: Start difference. First operand 241 states and 276 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 22:33:17,649 WARN L232 SmtUtils]: Spent 7.07s on a formula simplification. DAG size of input: 56 DAG size of output: 42 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-04-06 22:33:24,831 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:33:26,098 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:33:28,074 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:33:37,905 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:33:40,296 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:33:41,468 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:33:43,263 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:33:46,924 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:33:46,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:46,930 INFO L93 Difference]: Finished difference Result 280 states and 327 transitions. [2022-04-06 22:33:46,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-04-06 22:33:46,932 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) Word has length 110 [2022-04-06 22:33:46,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:46,933 INFO L225 Difference]: With dead ends: 280 [2022-04-06 22:33:46,933 INFO L226 Difference]: Without dead ends: 278 [2022-04-06 22:33:46,933 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 44.7s TimeCoverageRelationStatistics Valid=111, Invalid=641, Unknown=4, NotChecked=0, Total=756 [2022-04-06 22:33:46,934 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 27 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 26.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 26.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:46,934 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 226 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 649 Invalid, 0 Unknown, 64 Unchecked, 26.1s Time] [2022-04-06 22:33:46,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-04-06 22:33:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 254. [2022-04-06 22:33:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 157 states have (on average 1.1019108280254777) internal successors, (173), 161 states have internal predecessors, (173), 61 states have call successors, (61), 36 states have call predecessors, (61), 35 states have return successors, (60), 56 states have call predecessors, (60), 60 states have call successors, (60) [2022-04-06 22:33:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 294 transitions. [2022-04-06 22:33:46,994 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 294 transitions. Word has length 110 [2022-04-06 22:33:46,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:46,994 INFO L478 AbstractCegarLoop]: Abstraction has 254 states and 294 transitions. [2022-04-06 22:33:46,994 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 7 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (15), 7 states have call predecessors, (15), 6 states have call successors, (15) [2022-04-06 22:33:46,994 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 294 transitions. [2022-04-06 22:33:46,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 22:33:46,995 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:46,995 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:47,000 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 22:33:47,199 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 22:33:47,199 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 19 times [2022-04-06 22:33:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:47,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2135924219] [2022-04-06 22:33:47,200 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:47,200 INFO L85 PathProgramCache]: Analyzing trace with hash 805225117, now seen corresponding path program 20 times [2022-04-06 22:33:47,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:47,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634017320] [2022-04-06 22:33:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:47,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:47,206 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:47,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928353242] [2022-04-06 22:33:47,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:33:47,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:47,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:47,207 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 22:33:47,207 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 22:33:47,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:33:47,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:47,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 22:33:47,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:51,769 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 78 proven. 71 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-04-06 22:33:51,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 102 proven. 26 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2022-04-06 22:33:52,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634017320] [2022-04-06 22:33:52,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928353242] [2022-04-06 22:33:52,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928353242] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:52,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:52,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 22 [2022-04-06 22:33:52,583 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:52,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2135924219] [2022-04-06 22:33:52,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2135924219] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:52,584 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:52,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:33:52,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626469352] [2022-04-06 22:33:52,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:52,584 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:33:52,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:52,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:33:52,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:33:52,584 INFO L87 Difference]: Start difference. First operand 254 states and 294 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-04-06 22:33:55,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:55,552 INFO L93 Difference]: Finished difference Result 284 states and 333 transitions. [2022-04-06 22:33:55,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 22:33:55,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) Word has length 110 [2022-04-06 22:33:55,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:55,553 INFO L225 Difference]: With dead ends: 284 [2022-04-06 22:33:55,553 INFO L226 Difference]: Without dead ends: 282 [2022-04-06 22:33:55,554 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 198 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-04-06 22:33:55,554 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 24 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:55,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 233 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 721 Invalid, 0 Unknown, 15 Unchecked, 2.8s Time] [2022-04-06 22:33:55,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-04-06 22:33:55,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 267. [2022-04-06 22:33:55,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 164 states have (on average 1.103658536585366) internal successors, (181), 169 states have internal predecessors, (181), 66 states have call successors, (66), 37 states have call predecessors, (66), 36 states have return successors, (65), 60 states have call predecessors, (65), 65 states have call successors, (65) [2022-04-06 22:33:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 312 transitions. [2022-04-06 22:33:55,622 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 312 transitions. Word has length 110 [2022-04-06 22:33:55,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:55,622 INFO L478 AbstractCegarLoop]: Abstraction has 267 states and 312 transitions. [2022-04-06 22:33:55,622 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 9 states have call successors, (18) [2022-04-06 22:33:55,622 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 312 transitions. [2022-04-06 22:33:55,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 22:33:55,623 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:55,623 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:55,641 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 22:33:55,835 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 22:33:55,835 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:55,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:55,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 21 times [2022-04-06 22:33:55,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:55,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1250984485] [2022-04-06 22:33:55,836 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:55,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2103538785, now seen corresponding path program 22 times [2022-04-06 22:33:55,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:55,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121082869] [2022-04-06 22:33:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:55,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:55,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:55,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756833339] [2022-04-06 22:33:55,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:33:55,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:55,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:55,843 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 22:33:55,843 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 22:33:55,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:33:55,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:33:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 22:33:55,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:33:57,747 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 80 proven. 93 refuted. 0 times theorem prover too weak. 237 trivial. 0 not checked. [2022-04-06 22:33:57,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:33:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 103 proven. 33 refuted. 0 times theorem prover too weak. 274 trivial. 0 not checked. [2022-04-06 22:33:58,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:33:58,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121082869] [2022-04-06 22:33:58,508 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:33:58,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756833339] [2022-04-06 22:33:58,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756833339] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:33:58,508 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:33:58,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 24 [2022-04-06 22:33:58,508 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:33:58,508 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1250984485] [2022-04-06 22:33:58,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1250984485] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:33:58,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:33:58,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 22:33:58,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814147053] [2022-04-06 22:33:58,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:33:58,509 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 22:33:58,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:58,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 22:33:58,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2022-04-06 22:33:58,509 INFO L87 Difference]: Start difference. First operand 267 states and 312 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 22:33:59,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:33:59,666 INFO L93 Difference]: Finished difference Result 304 states and 354 transitions. [2022-04-06 22:33:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 22:33:59,667 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) Word has length 110 [2022-04-06 22:33:59,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:33:59,668 INFO L225 Difference]: With dead ends: 304 [2022-04-06 22:33:59,668 INFO L226 Difference]: Without dead ends: 302 [2022-04-06 22:33:59,669 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 195 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2022-04-06 22:33:59,669 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-04-06 22:33:59,669 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 194 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-04-06 22:33:59,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-04-06 22:33:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 260. [2022-04-06 22:33:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 161 states have (on average 1.093167701863354) internal successors, (176), 166 states have internal predecessors, (176), 61 states have call successors, (61), 38 states have call predecessors, (61), 37 states have return successors, (60), 55 states have call predecessors, (60), 60 states have call successors, (60) [2022-04-06 22:33:59,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 297 transitions. [2022-04-06 22:33:59,737 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 297 transitions. Word has length 110 [2022-04-06 22:33:59,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:33:59,737 INFO L478 AbstractCegarLoop]: Abstraction has 260 states and 297 transitions. [2022-04-06 22:33:59,738 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 9 states have call predecessors, (18), 8 states have call successors, (18) [2022-04-06 22:33:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 297 transitions. [2022-04-06 22:33:59,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 22:33:59,738 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:33:59,738 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:33:59,757 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 22:33:59,949 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 22:33:59,949 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:33:59,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:33:59,949 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 23 times [2022-04-06 22:33:59,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:33:59,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [898580241] [2022-04-06 22:33:59,950 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:33:59,950 INFO L85 PathProgramCache]: Analyzing trace with hash -527866339, now seen corresponding path program 24 times [2022-04-06 22:33:59,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:33:59,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248325673] [2022-04-06 22:33:59,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:33:59,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:33:59,955 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:33:59,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [998796424] [2022-04-06 22:33:59,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:33:59,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:33:59,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:33:59,958 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 22:33:59,958 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 22:34:00,288 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 22:34:00,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:00,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 55 conjunts are in the unsatisfiable core [2022-04-06 22:34:00,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:01,798 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 118 proven. 48 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2022-04-06 22:34:01,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:02,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248325673] [2022-04-06 22:34:02,457 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998796424] [2022-04-06 22:34:02,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998796424] provided 0 perfect and 1 imperfect interpolant sequences [2022-04-06 22:34:02,457 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-04-06 22:34:02,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2022-04-06 22:34:02,457 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:02,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [898580241] [2022-04-06 22:34:02,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [898580241] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:02,457 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:02,457 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 22:34:02,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706265707] [2022-04-06 22:34:02,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:02,458 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 22:34:02,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:02,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 22:34:02,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2022-04-06 22:34:02,458 INFO L87 Difference]: Start difference. First operand 260 states and 297 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-06 22:34:03,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:03,493 INFO L93 Difference]: Finished difference Result 312 states and 360 transitions. [2022-04-06 22:34:03,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:34:03,493 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) Word has length 110 [2022-04-06 22:34:03,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:03,494 INFO L225 Difference]: With dead ends: 312 [2022-04-06 22:34:03,494 INFO L226 Difference]: Without dead ends: 310 [2022-04-06 22:34:03,495 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-04-06 22:34:03,495 INFO L913 BasicCegarLoop]: 23 mSDtfsCounter, 30 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:03,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 133 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:34:03,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-04-06 22:34:03,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 278. [2022-04-06 22:34:03,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 173 states have (on average 1.092485549132948) internal successors, (189), 178 states have internal predecessors, (189), 64 states have call successors, (64), 41 states have call predecessors, (64), 40 states have return successors, (63), 58 states have call predecessors, (63), 63 states have call successors, (63) [2022-04-06 22:34:03,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 316 transitions. [2022-04-06 22:34:03,564 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 316 transitions. Word has length 110 [2022-04-06 22:34:03,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:03,564 INFO L478 AbstractCegarLoop]: Abstraction has 278 states and 316 transitions. [2022-04-06 22:34:03,565 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 13 states have internal predecessors, (29), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2022-04-06 22:34:03,565 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 316 transitions. [2022-04-06 22:34:03,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 22:34:03,565 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:03,565 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:03,570 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 22:34:03,770 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 22:34:03,770 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:03,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:03,770 INFO L85 PathProgramCache]: Analyzing trace with hash 858337055, now seen corresponding path program 25 times [2022-04-06 22:34:03,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:03,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1096438134] [2022-04-06 22:34:03,771 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash 858337055, now seen corresponding path program 26 times [2022-04-06 22:34:03,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:03,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767727377] [2022-04-06 22:34:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:03,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:03,779 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:03,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [391599721] [2022-04-06 22:34:03,779 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:34:03,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:03,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:03,780 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 22:34:03,781 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 22:34:03,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:34:03,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:03,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjunts are in the unsatisfiable core [2022-04-06 22:34:03,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:05,018 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-04-06 22:34:05,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:06,039 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-04-06 22:34:06,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:06,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767727377] [2022-04-06 22:34:06,039 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:06,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391599721] [2022-04-06 22:34:06,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391599721] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:06,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:06,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2022-04-06 22:34:06,040 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:06,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1096438134] [2022-04-06 22:34:06,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1096438134] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:06,040 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:06,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:34:06,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236064289] [2022-04-06 22:34:06,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:06,040 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:34:06,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:06,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:34:06,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:34:06,041 INFO L87 Difference]: Start difference. First operand 278 states and 316 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 22:34:06,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:06,652 INFO L93 Difference]: Finished difference Result 302 states and 347 transitions. [2022-04-06 22:34:06,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-04-06 22:34:06,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2022-04-06 22:34:06,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:06,657 INFO L225 Difference]: With dead ends: 302 [2022-04-06 22:34:06,657 INFO L226 Difference]: Without dead ends: 300 [2022-04-06 22:34:06,657 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:34:06,665 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:06,666 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 223 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-04-06 22:34:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-04-06 22:34:06,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 268. [2022-04-06 22:34:06,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 167 states have (on average 1.095808383233533) internal successors, (183), 172 states have internal predecessors, (183), 62 states have call successors, (62), 39 states have call predecessors, (62), 38 states have return successors, (61), 56 states have call predecessors, (61), 61 states have call successors, (61) [2022-04-06 22:34:06,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 306 transitions. [2022-04-06 22:34:06,768 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 306 transitions. Word has length 110 [2022-04-06 22:34:06,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:06,769 INFO L478 AbstractCegarLoop]: Abstraction has 268 states and 306 transitions. [2022-04-06 22:34:06,769 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 6 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 6 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 22:34:06,775 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 306 transitions. [2022-04-06 22:34:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-04-06 22:34:06,776 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:06,776 INFO L499 BasicCegarLoop]: trace histogram [14, 13, 13, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:06,782 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-04-06 22:34:06,982 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 22:34:06,982 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:06,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 27 times [2022-04-06 22:34:06,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:06,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [746679703] [2022-04-06 22:34:06,983 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:06,983 INFO L85 PathProgramCache]: Analyzing trace with hash -880954721, now seen corresponding path program 28 times [2022-04-06 22:34:06,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:06,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779275791] [2022-04-06 22:34:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:06,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:07,020 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:07,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421246344] [2022-04-06 22:34:07,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:34:07,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:07,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:07,035 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 22:34:07,036 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 22:34:07,096 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:34:07,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 22:34:07,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 103 proven. 79 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2022-04-06 22:34:07,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 105 proven. 8 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-04-06 22:34:07,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:07,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779275791] [2022-04-06 22:34:07,996 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:07,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421246344] [2022-04-06 22:34:07,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421246344] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:07,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:07,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 16 [2022-04-06 22:34:07,997 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:07,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [746679703] [2022-04-06 22:34:07,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [746679703] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:07,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:07,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:34:07,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793682697] [2022-04-06 22:34:07,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:07,997 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:34:07,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:34:07,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:34:07,998 INFO L87 Difference]: Start difference. First operand 268 states and 306 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 22:34:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:09,043 INFO L93 Difference]: Finished difference Result 318 states and 366 transitions. [2022-04-06 22:34:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:34:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) Word has length 110 [2022-04-06 22:34:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:09,045 INFO L225 Difference]: With dead ends: 318 [2022-04-06 22:34:09,045 INFO L226 Difference]: Without dead ends: 316 [2022-04-06 22:34:09,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 201 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:34:09,045 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 12 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 266 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:09,045 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 266 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-04-06 22:34:09,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2022-04-06 22:34:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 284. [2022-04-06 22:34:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 177 states have (on average 1.0960451977401129) internal successors, (194), 183 states have internal predecessors, (194), 66 states have call successors, (66), 41 states have call predecessors, (66), 40 states have return successors, (65), 59 states have call predecessors, (65), 65 states have call successors, (65) [2022-04-06 22:34:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 325 transitions. [2022-04-06 22:34:09,123 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 325 transitions. Word has length 110 [2022-04-06 22:34:09,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:09,123 INFO L478 AbstractCegarLoop]: Abstraction has 284 states and 325 transitions. [2022-04-06 22:34:09,123 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 6 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 6 states have call successors, (18) [2022-04-06 22:34:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 325 transitions. [2022-04-06 22:34:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 22:34:09,124 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:09,124 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:09,142 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 22:34:09,335 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 22:34:09,335 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:09,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 29 times [2022-04-06 22:34:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:09,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [502340163] [2022-04-06 22:34:09,336 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:09,336 INFO L85 PathProgramCache]: Analyzing trace with hash 769627864, now seen corresponding path program 30 times [2022-04-06 22:34:09,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:09,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420959062] [2022-04-06 22:34:09,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:09,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:09,344 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:09,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86970503] [2022-04-06 22:34:09,344 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:34:09,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:09,344 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:09,346 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 22:34:09,375 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 22:34:09,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:34:09,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:09,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 35 conjunts are in the unsatisfiable core [2022-04-06 22:34:09,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 334 trivial. 0 not checked. [2022-04-06 22:34:13,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 22:34:17,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:17,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420959062] [2022-04-06 22:34:17,094 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:17,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86970503] [2022-04-06 22:34:17,094 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86970503] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:17,095 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:17,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 22:34:17,095 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:17,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [502340163] [2022-04-06 22:34:17,095 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [502340163] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:17,095 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:17,095 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:34:17,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758007566] [2022-04-06 22:34:17,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:17,095 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:34:17,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:17,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:34:17,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=140, Unknown=1, NotChecked=0, Total=182 [2022-04-06 22:34:17,096 INFO L87 Difference]: Start difference. First operand 284 states and 325 transitions. Second operand has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:34:20,514 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:34:22,577 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-04-06 22:34:24,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:24,472 INFO L93 Difference]: Finished difference Result 342 states and 399 transitions. [2022-04-06 22:34:24,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:34:24,473 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) Word has length 115 [2022-04-06 22:34:24,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:24,474 INFO L225 Difference]: With dead ends: 342 [2022-04-06 22:34:24,474 INFO L226 Difference]: Without dead ends: 340 [2022-04-06 22:34:24,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=60, Invalid=211, Unknown=1, NotChecked=0, Total=272 [2022-04-06 22:34:24,475 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 19 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 19 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:24,475 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 181 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 274 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2022-04-06 22:34:24,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-04-06 22:34:24,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 306. [2022-04-06 22:34:24,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 190 states have (on average 1.0947368421052632) internal successors, (208), 197 states have internal predecessors, (208), 72 states have call successors, (72), 44 states have call predecessors, (72), 43 states have return successors, (71), 64 states have call predecessors, (71), 71 states have call successors, (71) [2022-04-06 22:34:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 351 transitions. [2022-04-06 22:34:24,562 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 351 transitions. Word has length 115 [2022-04-06 22:34:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:24,563 INFO L478 AbstractCegarLoop]: Abstraction has 306 states and 351 transitions. [2022-04-06 22:34:24,563 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 6 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:34:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 351 transitions. [2022-04-06 22:34:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 22:34:24,563 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:24,564 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:24,581 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 22:34:24,764 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 22:34:24,764 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:24,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:24,764 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 31 times [2022-04-06 22:34:24,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:24,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1989256751] [2022-04-06 22:34:24,765 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash 256983896, now seen corresponding path program 32 times [2022-04-06 22:34:24,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:24,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530618509] [2022-04-06 22:34:24,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:24,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:24,770 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:24,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1386098146] [2022-04-06 22:34:24,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:34:24,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:24,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:24,771 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 22:34:24,772 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 22:34:24,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:34:24,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:24,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 58 conjunts are in the unsatisfiable core [2022-04-06 22:34:24,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:25,338 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 103 proven. 76 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 22:34:25,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 22:34:25,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:25,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530618509] [2022-04-06 22:34:25,603 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:25,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386098146] [2022-04-06 22:34:25,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386098146] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:25,603 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:25,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 15 [2022-04-06 22:34:25,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:25,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1989256751] [2022-04-06 22:34:25,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1989256751] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:25,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:25,604 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-04-06 22:34:25,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786188179] [2022-04-06 22:34:25,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:25,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-04-06 22:34:25,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:25,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-04-06 22:34:25,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-04-06 22:34:25,604 INFO L87 Difference]: Start difference. First operand 306 states and 351 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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 22:34:26,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:26,120 INFO L93 Difference]: Finished difference Result 348 states and 394 transitions. [2022-04-06 22:34:26,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-04-06 22:34:26,123 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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 115 [2022-04-06 22:34:26,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:26,125 INFO L225 Difference]: With dead ends: 348 [2022-04-06 22:34:26,125 INFO L226 Difference]: Without dead ends: 346 [2022-04-06 22:34:26,125 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 212 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-04-06 22:34:26,125 INFO L913 BasicCegarLoop]: 41 mSDtfsCounter, 16 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:26,126 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 251 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-04-06 22:34:26,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-04-06 22:34:26,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 333. [2022-04-06 22:34:26,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 209 states have (on average 1.0956937799043063) internal successors, (229), 214 states have internal predecessors, (229), 75 states have call successors, (75), 49 states have call predecessors, (75), 48 states have return successors, (74), 69 states have call predecessors, (74), 74 states have call successors, (74) [2022-04-06 22:34:26,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 378 transitions. [2022-04-06 22:34:26,221 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 378 transitions. Word has length 115 [2022-04-06 22:34:26,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:26,221 INFO L478 AbstractCegarLoop]: Abstraction has 333 states and 378 transitions. [2022-04-06 22:34:26,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 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 22:34:26,222 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 378 transitions. [2022-04-06 22:34:26,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 22:34:26,222 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:26,222 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:26,239 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 22:34:26,429 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 22:34:26,429 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:26,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:26,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 33 times [2022-04-06 22:34:26,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:26,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1454869469] [2022-04-06 22:34:26,430 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:26,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1986999402, now seen corresponding path program 34 times [2022-04-06 22:34:26,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:26,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85258913] [2022-04-06 22:34:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:26,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:26,435 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:26,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1236893638] [2022-04-06 22:34:26,435 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:34:26,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:26,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:26,436 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 22:34:26,437 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 22:34:26,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:34:26,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:26,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 67 conjunts are in the unsatisfiable core [2022-04-06 22:34:26,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 102 proven. 107 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-04-06 22:34:27,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 22:34:27,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:27,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85258913] [2022-04-06 22:34:27,577 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236893638] [2022-04-06 22:34:27,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236893638] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:27,577 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:27,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10] total 21 [2022-04-06 22:34:27,577 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:27,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1454869469] [2022-04-06 22:34:27,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1454869469] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:27,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:27,577 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-04-06 22:34:27,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61197223] [2022-04-06 22:34:27,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:27,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-04-06 22:34:27,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:27,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-04-06 22:34:27,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:34:27,578 INFO L87 Difference]: Start difference. First operand 333 states and 378 transitions. Second operand has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 22:34:28,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:28,490 INFO L93 Difference]: Finished difference Result 381 states and 431 transitions. [2022-04-06 22:34:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-04-06 22:34:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) Word has length 115 [2022-04-06 22:34:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:28,494 INFO L225 Difference]: With dead ends: 381 [2022-04-06 22:34:28,494 INFO L226 Difference]: Without dead ends: 379 [2022-04-06 22:34:28,494 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 207 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-04-06 22:34:28,495 INFO L913 BasicCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:28,495 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 218 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:34:28,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-04-06 22:34:28,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-04-06 22:34:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 239 states have (on average 1.096234309623431) internal successors, (262), 244 states have internal predecessors, (262), 84 states have call successors, (84), 56 states have call predecessors, (84), 55 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 22:34:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 429 transitions. [2022-04-06 22:34:28,615 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 429 transitions. Word has length 115 [2022-04-06 22:34:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:28,615 INFO L478 AbstractCegarLoop]: Abstraction has 379 states and 429 transitions. [2022-04-06 22:34:28,615 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.2) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 8 states have call predecessors, (19), 7 states have call successors, (19) [2022-04-06 22:34:28,615 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 429 transitions. [2022-04-06 22:34:28,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 22:34:28,616 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:28,616 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:28,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-04-06 22:34:28,832 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 22:34:28,832 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 35 times [2022-04-06 22:34:28,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:28,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1092758005] [2022-04-06 22:34:28,833 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:28,833 INFO L85 PathProgramCache]: Analyzing trace with hash 627101656, now seen corresponding path program 36 times [2022-04-06 22:34:28,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:28,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189341113] [2022-04-06 22:34:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:28,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:28,838 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:28,838 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763400894] [2022-04-06 22:34:28,838 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:34:28,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:28,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:28,839 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 22:34:28,840 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 22:34:28,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-04-06 22:34:28,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:28,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 41 conjunts are in the unsatisfiable core [2022-04-06 22:34:28,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:29,180 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 99 proven. 39 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2022-04-06 22:34:29,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 22:34:31,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:31,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189341113] [2022-04-06 22:34:31,414 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:31,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763400894] [2022-04-06 22:34:31,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763400894] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:31,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:31,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 14 [2022-04-06 22:34:31,414 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:31,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1092758005] [2022-04-06 22:34:31,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1092758005] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:31,414 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:31,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-04-06 22:34:31,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587118011] [2022-04-06 22:34:31,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:31,415 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-04-06 22:34:31,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:31,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-04-06 22:34:31,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=144, Unknown=1, NotChecked=0, Total=182 [2022-04-06 22:34:31,415 INFO L87 Difference]: Start difference. First operand 379 states and 429 transitions. Second operand has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 22:34:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:31,740 INFO L93 Difference]: Finished difference Result 395 states and 448 transitions. [2022-04-06 22:34:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-04-06 22:34:31,740 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 115 [2022-04-06 22:34:31,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:31,742 INFO L225 Difference]: With dead ends: 395 [2022-04-06 22:34:31,742 INFO L226 Difference]: Without dead ends: 393 [2022-04-06 22:34:31,742 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 215 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=56, Invalid=215, Unknown=1, NotChecked=0, Total=272 [2022-04-06 22:34:31,742 INFO L913 BasicCegarLoop]: 37 mSDtfsCounter, 14 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:31,743 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 211 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 209 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-04-06 22:34:31,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-04-06 22:34:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 387. [2022-04-06 22:34:31,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 243 states have (on average 1.0946502057613168) internal successors, (266), 249 states have internal predecessors, (266), 87 states have call successors, (87), 57 states have call predecessors, (87), 56 states have return successors, (86), 80 states have call predecessors, (86), 86 states have call successors, (86) [2022-04-06 22:34:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 439 transitions. [2022-04-06 22:34:31,868 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 439 transitions. Word has length 115 [2022-04-06 22:34:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:31,869 INFO L478 AbstractCegarLoop]: Abstraction has 387 states and 439 transitions. [2022-04-06 22:34:31,869 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.6) internal successors, (26), 9 states have internal predecessors, (26), 5 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 22:34:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 439 transitions. [2022-04-06 22:34:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 22:34:31,870 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:31,870 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:31,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-04-06 22:34:32,090 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 22:34:32,090 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:32,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1616881642, now seen corresponding path program 37 times [2022-04-06 22:34:32,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:32,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1380845343] [2022-04-06 22:34:32,091 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:32,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1616881642, now seen corresponding path program 38 times [2022-04-06 22:34:32,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:32,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662142697] [2022-04-06 22:34:32,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:32,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:32,099 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:32,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991326470] [2022-04-06 22:34:32,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:34:32,100 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:32,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:32,101 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 22:34:32,102 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 22:34:32,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:34:32,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:32,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 57 conjunts are in the unsatisfiable core [2022-04-06 22:34:32,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2022-04-06 22:34:33,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:34,072 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 22:34:34,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:34,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662142697] [2022-04-06 22:34:34,072 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:34,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991326470] [2022-04-06 22:34:34,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991326470] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:34,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:34,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 19 [2022-04-06 22:34:34,073 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:34,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1380845343] [2022-04-06 22:34:34,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1380845343] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:34,073 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:34,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:34:34,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320724877] [2022-04-06 22:34:34,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:34,073 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:34:34,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:34,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:34:34,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2022-04-06 22:34:34,073 INFO L87 Difference]: Start difference. First operand 387 states and 439 transitions. Second operand has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 22:34:35,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:35,857 INFO L93 Difference]: Finished difference Result 421 states and 480 transitions. [2022-04-06 22:34:35,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:34:35,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 115 [2022-04-06 22:34:35,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:35,859 INFO L225 Difference]: With dead ends: 421 [2022-04-06 22:34:35,859 INFO L226 Difference]: Without dead ends: 419 [2022-04-06 22:34:35,860 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 211 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:34:35,860 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 16 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:35,860 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 267 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 22:34:35,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2022-04-06 22:34:35,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 389. [2022-04-06 22:34:35,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 243 states have (on average 1.0946502057613168) internal successors, (266), 249 states have internal predecessors, (266), 89 states have call successors, (89), 57 states have call predecessors, (89), 56 states have return successors, (88), 82 states have call predecessors, (88), 88 states have call successors, (88) [2022-04-06 22:34:35,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 443 transitions. [2022-04-06 22:34:35,996 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 443 transitions. Word has length 115 [2022-04-06 22:34:35,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:35,996 INFO L478 AbstractCegarLoop]: Abstraction has 389 states and 443 transitions. [2022-04-06 22:34:35,996 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 22:34:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 443 transitions. [2022-04-06 22:34:35,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-04-06 22:34:35,997 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:35,997 INFO L499 BasicCegarLoop]: trace histogram [15, 14, 14, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:36,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-04-06 22:34:36,212 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 22:34:36,213 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 39 times [2022-04-06 22:34:36,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:36,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2118694580] [2022-04-06 22:34:36,213 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash -2129525610, now seen corresponding path program 40 times [2022-04-06 22:34:36,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:36,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877718525] [2022-04-06 22:34:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:36,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:36,218 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:36,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1916383867] [2022-04-06 22:34:36,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:34:36,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:36,218 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:36,224 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 22:34:36,226 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 22:34:36,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:34:36,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:36,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 53 conjunts are in the unsatisfiable core [2022-04-06 22:34:36,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:37,912 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 95 proven. 57 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2022-04-06 22:34:37,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:38,264 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 117 proven. 5 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-04-06 22:34:38,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:38,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877718525] [2022-04-06 22:34:38,264 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:38,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916383867] [2022-04-06 22:34:38,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916383867] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:38,264 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:38,264 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 20 [2022-04-06 22:34:38,264 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:38,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2118694580] [2022-04-06 22:34:38,265 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2118694580] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:38,265 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:38,265 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-04-06 22:34:38,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791155213] [2022-04-06 22:34:38,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:38,265 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-04-06 22:34:38,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:38,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-04-06 22:34:38,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:34:38,265 INFO L87 Difference]: Start difference. First operand 389 states and 443 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 22:34:39,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:39,917 INFO L93 Difference]: Finished difference Result 427 states and 483 transitions. [2022-04-06 22:34:39,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-04-06 22:34:39,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) Word has length 115 [2022-04-06 22:34:39,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:39,919 INFO L225 Difference]: With dead ends: 427 [2022-04-06 22:34:39,919 INFO L226 Difference]: Without dead ends: 425 [2022-04-06 22:34:39,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:34:39,920 INFO L913 BasicCegarLoop]: 43 mSDtfsCounter, 17 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:39,920 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 284 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 22:34:39,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2022-04-06 22:34:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 369. [2022-04-06 22:34:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 231 states have (on average 1.0952380952380953) internal successors, (253), 237 states have internal predecessors, (253), 84 states have call successors, (84), 54 states have call predecessors, (84), 53 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) [2022-04-06 22:34:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 420 transitions. [2022-04-06 22:34:40,044 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 420 transitions. Word has length 115 [2022-04-06 22:34:40,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:40,045 INFO L478 AbstractCegarLoop]: Abstraction has 369 states and 420 transitions. [2022-04-06 22:34:40,045 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 8 states have call predecessors, (19), 6 states have call successors, (19) [2022-04-06 22:34:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 420 transitions. [2022-04-06 22:34:40,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 22:34:40,046 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:40,046 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:40,062 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 22:34:40,261 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 22:34:40,261 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:40,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:40,262 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 41 times [2022-04-06 22:34:40,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:40,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [81216798] [2022-04-06 22:34:40,262 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:40,262 INFO L85 PathProgramCache]: Analyzing trace with hash -618835194, now seen corresponding path program 42 times [2022-04-06 22:34:40,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:40,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880641106] [2022-04-06 22:34:40,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:40,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:40,267 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:40,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1576408150] [2022-04-06 22:34:40,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:34:40,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:40,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:40,268 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 22:34:40,269 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 22:34:40,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 22:34:40,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:40,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 27 conjunts are in the unsatisfiable core [2022-04-06 22:34:40,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:41,628 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 138 proven. 35 refuted. 0 times theorem prover too weak. 438 trivial. 0 not checked. [2022-04-06 22:34:41,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:42,014 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-04-06 22:34:42,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:42,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880641106] [2022-04-06 22:34:42,014 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:42,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576408150] [2022-04-06 22:34:42,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576408150] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:42,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:42,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 16 [2022-04-06 22:34:42,015 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:42,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [81216798] [2022-04-06 22:34:42,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [81216798] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:42,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:42,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-04-06 22:34:42,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760055782] [2022-04-06 22:34:42,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:42,015 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-04-06 22:34:42,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:42,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-04-06 22:34:42,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:34:42,016 INFO L87 Difference]: Start difference. First operand 369 states and 420 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 22:34:43,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:43,726 INFO L93 Difference]: Finished difference Result 461 states and 532 transitions. [2022-04-06 22:34:43,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:34:43,726 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) Word has length 128 [2022-04-06 22:34:43,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:43,728 INFO L225 Difference]: With dead ends: 461 [2022-04-06 22:34:43,728 INFO L226 Difference]: Without dead ends: 234 [2022-04-06 22:34:43,729 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 238 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-04-06 22:34:43,729 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 23 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:43,729 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 160 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-04-06 22:34:43,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-04-06 22:34:43,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 217. [2022-04-06 22:34:43,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 136 states have (on average 1.0808823529411764) internal successors, (147), 140 states have internal predecessors, (147), 48 states have call successors, (48), 33 states have call predecessors, (48), 32 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2022-04-06 22:34:43,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 242 transitions. [2022-04-06 22:34:43,820 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 242 transitions. Word has length 128 [2022-04-06 22:34:43,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:43,820 INFO L478 AbstractCegarLoop]: Abstraction has 217 states and 242 transitions. [2022-04-06 22:34:43,821 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 6 states have call predecessors, (14), 4 states have call successors, (14) [2022-04-06 22:34:43,821 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 242 transitions. [2022-04-06 22:34:43,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 22:34:43,821 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:43,821 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:43,829 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 22:34:44,026 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 22:34:44,027 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:44,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:44,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1849654520, now seen corresponding path program 43 times [2022-04-06 22:34:44,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:44,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1835981373] [2022-04-06 22:34:44,027 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:44,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1849654520, now seen corresponding path program 44 times [2022-04-06 22:34:44,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:44,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853494394] [2022-04-06 22:34:44,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:44,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:44,032 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:44,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1136261930] [2022-04-06 22:34:44,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-04-06 22:34:44,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:44,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:44,033 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 22:34:44,034 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 22:34:44,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-04-06 22:34:44,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:44,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 66 conjunts are in the unsatisfiable core [2022-04-06 22:34:44,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:45,657 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 104 proven. 120 refuted. 0 times theorem prover too weak. 387 trivial. 0 not checked. [2022-04-06 22:34:45,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-04-06 22:34:46,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:46,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853494394] [2022-04-06 22:34:46,011 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:46,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136261930] [2022-04-06 22:34:46,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136261930] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:46,011 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:46,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 18 [2022-04-06 22:34:46,011 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:46,011 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1835981373] [2022-04-06 22:34:46,011 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1835981373] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:46,011 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:46,011 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-04-06 22:34:46,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731869684] [2022-04-06 22:34:46,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:46,012 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-04-06 22:34:46,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:46,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-04-06 22:34:46,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2022-04-06 22:34:46,012 INFO L87 Difference]: Start difference. First operand 217 states and 242 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 22:34:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:47,677 INFO L93 Difference]: Finished difference Result 257 states and 293 transitions. [2022-04-06 22:34:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-04-06 22:34:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-04-06 22:34:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:47,679 INFO L225 Difference]: With dead ends: 257 [2022-04-06 22:34:47,680 INFO L226 Difference]: Without dead ends: 255 [2022-04-06 22:34:47,680 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-04-06 22:34:47,680 INFO L913 BasicCegarLoop]: 47 mSDtfsCounter, 13 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 640 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 640 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:47,680 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 280 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 640 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-04-06 22:34:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-04-06 22:34:47,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 244. [2022-04-06 22:34:47,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 152 states have (on average 1.0855263157894737) internal successors, (165), 157 states have internal predecessors, (165), 56 states have call successors, (56), 36 states have call predecessors, (56), 35 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2022-04-06 22:34:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 276 transitions. [2022-04-06 22:34:47,778 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 276 transitions. Word has length 128 [2022-04-06 22:34:47,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:47,778 INFO L478 AbstractCegarLoop]: Abstraction has 244 states and 276 transitions. [2022-04-06 22:34:47,778 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 8 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 22:34:47,778 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 276 transitions. [2022-04-06 22:34:47,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 22:34:47,779 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:47,779 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:47,797 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 22:34:47,999 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 22:34:48,000 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:48,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:48,000 INFO L85 PathProgramCache]: Analyzing trace with hash 706021000, now seen corresponding path program 45 times [2022-04-06 22:34:48,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:48,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [388318004] [2022-04-06 22:34:48,000 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:48,000 INFO L85 PathProgramCache]: Analyzing trace with hash 706021000, now seen corresponding path program 46 times [2022-04-06 22:34:48,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:48,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015531570] [2022-04-06 22:34:48,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:48,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:48,008 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:48,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1718041602] [2022-04-06 22:34:48,008 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-04-06 22:34:48,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:48,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:48,009 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 22:34:48,010 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 22:34:48,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-04-06 22:34:48,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:48,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 90 conjunts are in the unsatisfiable core [2022-04-06 22:34:48,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:50,037 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 140 proven. 156 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2022-04-06 22:34:50,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-04-06 22:34:50,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:50,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015531570] [2022-04-06 22:34:50,463 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:50,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718041602] [2022-04-06 22:34:50,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718041602] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:50,463 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:50,463 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 21 [2022-04-06 22:34:50,463 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:50,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [388318004] [2022-04-06 22:34:50,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [388318004] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:50,464 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:50,464 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-04-06 22:34:50,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292280383] [2022-04-06 22:34:50,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:50,464 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-04-06 22:34:50,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:50,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-04-06 22:34:50,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-04-06 22:34:50,464 INFO L87 Difference]: Start difference. First operand 244 states and 276 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 22:34:51,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:51,417 INFO L93 Difference]: Finished difference Result 296 states and 336 transitions. [2022-04-06 22:34:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-04-06 22:34:51,418 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) Word has length 128 [2022-04-06 22:34:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:51,419 INFO L225 Difference]: With dead ends: 296 [2022-04-06 22:34:51,419 INFO L226 Difference]: Without dead ends: 294 [2022-04-06 22:34:51,420 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 230 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=95, Invalid=457, Unknown=0, NotChecked=0, Total=552 [2022-04-06 22:34:51,421 INFO L913 BasicCegarLoop]: 39 mSDtfsCounter, 29 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:51,421 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 174 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-04-06 22:34:51,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-04-06 22:34:51,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 281. [2022-04-06 22:34:51,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 176 states have (on average 1.0852272727272727) internal successors, (191), 181 states have internal predecessors, (191), 63 states have call successors, (63), 42 states have call predecessors, (63), 41 states have return successors, (62), 57 states have call predecessors, (62), 62 states have call successors, (62) [2022-04-06 22:34:51,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 316 transitions. [2022-04-06 22:34:51,538 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 316 transitions. Word has length 128 [2022-04-06 22:34:51,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:51,539 INFO L478 AbstractCegarLoop]: Abstraction has 281 states and 316 transitions. [2022-04-06 22:34:51,539 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 15 states have internal predecessors, (36), 8 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (21), 8 states have call predecessors, (21), 8 states have call successors, (21) [2022-04-06 22:34:51,539 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 316 transitions. [2022-04-06 22:34:51,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-04-06 22:34:51,540 INFO L491 BasicCegarLoop]: Found error trace [2022-04-06 22:34:51,540 INFO L499 BasicCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-04-06 22:34:51,543 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-04-06 22:34:51,742 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 22:34:51,743 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-04-06 22:34:51,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-04-06 22:34:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2092224394, now seen corresponding path program 47 times [2022-04-06 22:34:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094468170] [2022-04-06 22:34:51,743 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-04-06 22:34:51,743 INFO L85 PathProgramCache]: Analyzing trace with hash 2092224394, now seen corresponding path program 48 times [2022-04-06 22:34:51,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-04-06 22:34:51,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389177683] [2022-04-06 22:34:51,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-04-06 22:34:51,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-04-06 22:34:51,748 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-04-06 22:34:51,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1083078961] [2022-04-06 22:34:51,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-04-06 22:34:51,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-04-06 22:34:51,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-04-06 22:34:51,749 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 22:34:51,750 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 22:34:51,809 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-04-06 22:34:51,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-04-06 22:34:51,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 34 conjunts are in the unsatisfiable core [2022-04-06 22:34:51,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-04-06 22:34:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 176 proven. 18 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2022-04-06 22:34:52,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-04-06 22:34:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 135 proven. 8 refuted. 0 times theorem prover too weak. 468 trivial. 0 not checked. [2022-04-06 22:34:52,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-04-06 22:34:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389177683] [2022-04-06 22:34:52,294 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-04-06 22:34:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083078961] [2022-04-06 22:34:52,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083078961] provided 0 perfect and 2 imperfect interpolant sequences [2022-04-06 22:34:52,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-04-06 22:34:52,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2022-04-06 22:34:52,294 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-04-06 22:34:52,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094468170] [2022-04-06 22:34:52,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094468170] provided 1 perfect and 0 imperfect interpolant sequences [2022-04-06 22:34:52,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-04-06 22:34:52,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-04-06 22:34:52,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550987799] [2022-04-06 22:34:52,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-04-06 22:34:52,295 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-04-06 22:34:52,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-04-06 22:34:52,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-04-06 22:34:52,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-04-06 22:34:52,295 INFO L87 Difference]: Start difference. First operand 281 states and 316 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:34:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-04-06 22:34:52,627 INFO L93 Difference]: Finished difference Result 281 states and 316 transitions. [2022-04-06 22:34:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-04-06 22:34:52,628 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 128 [2022-04-06 22:34:52,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-04-06 22:34:52,628 INFO L225 Difference]: With dead ends: 281 [2022-04-06 22:34:52,628 INFO L226 Difference]: Without dead ends: 0 [2022-04-06 22:34:52,628 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 241 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-04-06 22:34:52,629 INFO L913 BasicCegarLoop]: 29 mSDtfsCounter, 11 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-04-06 22:34:52,629 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 141 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 80 Invalid, 0 Unknown, 20 Unchecked, 0.2s Time] [2022-04-06 22:34:52,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-04-06 22:34:52,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-04-06 22:34:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-04-06 22:34:52,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-04-06 22:34:52,629 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2022-04-06 22:34:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-04-06 22:34:52,630 INFO L478 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-04-06 22:34:52,630 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2022-04-06 22:34:52,630 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-04-06 22:34:52,630 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-04-06 22:34:52,631 INFO L788 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-04-06 22:34:52,649 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-04-06 22:34:52,834 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 22:34:52,836 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-04-06 22:35:05,296 WARN L232 SmtUtils]: Spent 12.15s on a formula simplification. DAG size of input: 817 DAG size of output: 786 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 22:35:30,393 WARN L232 SmtUtils]: Spent 24.94s on a formula simplification. DAG size of input: 799 DAG size of output: 777 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 22:35:57,268 WARN L232 SmtUtils]: Spent 24.83s on a formula simplification. DAG size of input: 800 DAG size of output: 772 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 22:36:03,362 WARN L232 SmtUtils]: Spent 5.79s on a formula simplification. DAG size of input: 795 DAG size of output: 765 (called from [L 182] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.or) [2022-04-06 22:36:12,527 WARN L232 SmtUtils]: Spent 6.64s on a formula simplification. DAG size of input: 276 DAG size of output: 7 (called from [L 149] de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.HoareAnnotationComposer.combineInter)